international relations in the post cold war era
Taking Preferences Seriously:
A Liberal Theory of International Politics Andrew Moravcsik This article reformulates liberal international relations (IR) theory in a nonideological and nonutopian form appropriate to empirical social science. Liberal IR theory elaborates the insight that state-society relationsÐthe relationship of states to the domestic and transna- tional social context in which they are embeddedÐhave a fundamental impact on state behavior in world politics. Societal ideas, interests, and institutions in¯uence state behavior by shaping state preferences, that is, the fundamental social purposes underlying the strate- gic calculations of governments. For liberals, the con®guration of state preferences matters most in world politicsÐnot, as realists argue, the con®guration of capabilities and not, as institutionalists (that is, functional regime theorists) maintain, the con®guration of informa- tion and institutions. This article codi®es this basic liberal insight in the form of three core theoretical assumptions, derives from them three variants of liberal theory, and demon- strates that the existence of a coherent liberal theory has signi®cant theoretical, methodologi- cal, and empirical implications. Restated in this way, liberal theory deserves to be treated as a paradigmatic alternative empirically coequal with and analytically more fundamen- tal than the two dominant theories in contemporary IR scholarship: realism and insti- tutionalism.
For detailed comments and criticisms, I am grateful above all to Anne-Marie Slaughter, who was there from the beginning, and to Lea Brilmayer, Lawrence Broz, Marc Busch, James Caporaso, Dale Copeland, David Dessler, Jeffry Frieden, Martha Finnemore, Charles Glazer, Michael Griesdorf, Stefano Guzzini, Ernst Haas, Stanley Hoffmann, Stephen Holmes, Ted Hopf, Alan Houston, David Lumsdaine, Robert Keohane, Yuen Khong, Larry Kramer, David Long, Steven Lukes, James Marquart, Lisa Martin, Jonathan Mercer, Henry Nau, Kalypso NicolaõÈdis, James Nolt, Joseph Nye, John Odell, Kenneth Oye, Robert Paarlberg, Daniel Philpott, Gideon Rose, Judith Shklar, David Skidmore, Allison Stanger, Janice Stein, Andrew Wallace, Celeste Wallander, Stephen Walt, Alexander Wendt, Mark Zacher, Fareed Zakaria, Michael ZuÈ rn, and three anonymous referees. I thank also two other critics: Peter Katzenstein encouraged a more direct comparison with constructivist approaches and John Mearsheimer invited me to state the liberal case vis-aÁ -vis realism in a series of public debates. I am also indebted to participants in seminars at the Program on International Politics, Economics, and Security (PIPES), University of Chicago; University of Konstanz; University of Toronto; University of California, San Diego; Olin Institute and Center for Inter- national Affairs, Harvard University; International Jurisprudence Colloquium, New York University Law School; Fletcher School, Tufts University; and the European University Institute. For research support, I thank Amit Sevak, Brian Portnoy, and PIPES. For more detailed and documented versions of this article, see Moravcsik 1992.
International Organization51, 4, Autumn 1997, pp. 513±53 r1997 by The IO Foundation and the Massachusetts Institute of Technology @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Grounding liberal theory in a set of core social scienti®c assumptions helps over- come a disjuncture between contemporary empirical research on world politics and the language employed by scholars to describe IR as a ®eld. Liberal hypotheses stressing variation in state preferences play an increasingly central role in IR scholar- ship. These include explanations stressing the causal importance of state-society re- lations as shaped by domestic institutions (for example, the ``democratic peace''), by economic interdependence (for example, endogenous tariff theory), and by ideas about national, political, and socioeconomic public goods provision (for example, theories about the relationship between nationalism and con¯ict). Liberal hypotheses do not include, for reasons clari®ed later, functional regime theory. Yet the conceptual lan- guage of IR theory has not caught up with contemporary research. IR theorists con- tinue to speak as if the dominant theoretical cleavage in the ®eld were the dichotomy between realism and (``neoliberal'') institutionalism. The result: liberal IR theory of the kind outlined earlier is generally ignored as a major paradigmatic alternative.
Worse, its lack of paradigmatic status has permitted critics to caricature liberal theory as a normative, even utopian, ideology. Postwar realist critics such as Hans Morgenthau and E. H. Carr took rhetorical advantage of liberalism's historical role as an ideology to contrast its purported altruism (``idealism,'' ``legalism,'' ``moralism,'' or ``utopianism'') with realism's ``theoretical concern with human nature as it actu- ally is [and] historical processes as they actually take place.'' 1Forty years later, little has changed. Robert Gilpin's in¯uential typology in international political economy juxtaposes a positive mercantilist view (``politics determines economics'') against a narrower and conspicuously normative liberal one (``economicsshoulddetermine politics''). Kenneth Waltz, a realist critic, asserts that ``if the aims . . . of states be- come matters of . . . central concern, then we are forced back to the descriptive level; and from simple descriptions no valid generalizations can be drawn.'' 2 Liberals have responded to such criticisms not by proposing a uni®ed set of positive social scienti®c assumptions on which a nonideological and nonutopian liberal theory can be based, as has been done with considerable success for realism and institutionalism, but by conceding its theoretical incoherence and turning instead to intellectual history. It is widely accepted that any nontautological social scienti®c theory must be grounded in a set of positive assumptions from which arguments, explanations, and predictions can be de- rived. 3Yet surveys of liberal IR theory either collect disparate views held by ``classical'' liberal publicists or de®ne liberal theory teleologically, that is, according to its purported optimism concerning the potential for peace, cooperation, and international institutions in world history. Such studies offer an indispensable source of theoretical and normative inspi- ration. Judged by the more narrowly social scienti®c criteria adopted here, however, they do not justify reference to a distinct ``liberal'' IR theory.
Leading liberal IR theorists freely concede the absence of coherent microfounda- tional assumptions but conclude therefrom that a liberal IR theory in the social scien- 1. See Morgenthau 1960, 4; Keohane 1989, 68, n. 17; and Howard 1978, 134.
2. See Waltz 1979, 65, 27; Gilpin 1975, 27 (emphasis in original); and Gilpin 1987.
3. See Bueno de Mesquita 1996, 64±65; and Keohane 1986.
514International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris ti®c sensecannotexist. Robert Keohane, an institutionalist sympathetic to liberal- ism, maintains that ``in contrast to Marxism and Realism, Liberalism is not committed to ambitious and parsimonious structural theory.'' Michael Doyle, a pioneer in ana- lyzing the ``democratic peace,'' observes that liberal IR theory, unlike others, lacks ``canonical'' foundations. Mark Zacher and Richard Matthew, sympathetic liberals, assert that liberalism should be considered an ``approach,'' not a theory, since ``its propositions cannot be . . . deduced from its assumptions.'' 4Accurate though this may be as a characterization of intellectual history and current theory, it is second- best social science.
I seek to move beyond this unsatisfactory situation by proposing a set of core assumptions on which a general restatement of positive liberal IR theory can be grounded. In the ®rst section of the article I argue that the basic liberal insight about the centrality of state-society relations to world politics can be restated in terms of three positive assumptions, concerning, respectively, the nature of fundamental so- cial actors, the state, and the international system.
Drawing on these assumptions, I then elaborate three major variants of liberal theoryÐeach grounded in a distinctive causal mechanism linking social preferences and state behavior. Ideational liberalism stresses the impact on state behavior of con¯ict and compatibility among collective social values or identities concerning the scope and nature of public goods provision. Commercial liberalism stresses the im- pact on state behavior of gains and losses to individuals and groups in society from transnational economic interchange. Republican liberalism stresses the impact on state behavior of varying forms of domestic representation and the resulting incen- tives for social groups to engage in rent seeking. 5 Finally, I demonstrate that the identi®cation of coherent theoretical assumptions is not simply an abstract and semantic matter. It has signi®cant methodological, theo- retical, and empirical implications. The utility of a paradigmatic restatement should be evaluated on the basis of four criteria, each relevant to the empirical researcher:
superior parsimony, coherence, empirical accuracy, and multicausal consistency.
First, a theoretical restatement should begeneral and parsimonious,demonstrat- ing that a limited number of microfoundational assumptions can link a broad range of previously unconnected theories and hypotheses. This restatement does so by show- ing howliberalism provides a general theory of IR linking apparently unrelated areas of inquiry. The theory outlined here applies equally to liberal and nonliberal states, economic and national security affairs, con¯ictual and noncon¯ictual situa- tions, and the behavior both of individual states (``foreign policy'') and of aggrega- tions of states (``international relations''). Liberal theory, moreover, explains impor- tant phenomena overlooked by alternative theories, including the substantive content of foreign policy, historical change, and the distinctiveness of interstate relations among modern Western states.
4. See Keohane 1990, 166, 172±73; Doyle 1986, 1152; Zacher and Matthew 1992, 2; Matthew and Zacher 1995, 107±11, 117±20; Hoffmann 1987, 1995; and Nye 1988.
5. For other such distinctions, see Keohane 1990; and Doyle 1983. Liberal Theory of International Politics515 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Second, a theoretical restatement should berigorous and coherent,offering a clear de®nition of its own boundaries. This restatement does so by demonstrating that institutionalist theories of regimesÐcommonly treated as liberal due to ideological and historical connotationsÐare in fact based on assumptions closer to realism than to liberalism.This helps to explain why IR theorists have found it difficult to distill a set of coherent microfoundational assumptions for liberal theory.
Third, a theoretical restatement shoulddemonstrate empirical accuracy vis-aÁ -vis other theories;it should expose anomalies in existing work, forcing reconsideration of empirical ®ndings and theoretical positions. This restatement of liberal theory meets this criterion byrevealing signi®cant methodological biases in empirical evalu- ations of realist theories of ``relative gains-seeking'' and constructivist analyses of ideas and IR due to the omission of liberal alternatives.If these biases were corrected, liberal accounts might well supplant many widely accepted realist and institutional- ist, as well as constructivist, explanations of particular phenomena in world politics.
Fourth, a theoretical restatement shoulddemonstrate multicausal consistency.By specifying the antecedent conditions under which it is valid and the precise causal links to policy outcomes, a theory should specify rigorously how it can be synthe- sized with other theories into a multicausal explanation consistent with tenets of fundamental social theory. This restatement does so by reversing the nearly universal presumption among contemporary IR theorists that ``systemic'' theories like realism and institutionalism should be employed as an analytical ``®rst cut,'' with theories of ``domestic'' preference formation brought in only to explain anomaliesÐa prescrip- tion that is both methodologically biased and theoretically incoherent. In its place, this restatement dictates the reverse:Liberal theory is analytically prior to both realism and institutionalism because it de®nes the conditions under which their assumptions hold.
If this proposed reformulation of liberal IR theory meets these four criteria, as I argue it does, there is good reason to accord it a paradigmatic position empirically coequal with and analytically prior to realism and institutionalism, as well as construc- tivism, in theory and research on world politics.
Core Assumptions of Liberal IR Theory Liberal IR theory's fundamental premiseÐthat the relationship between states and the surrounding domestic and transnational society in which they are embedded criti- cally shapes state behavior by in¯uencing the social purposes underlying state pref- erencesÐcan be restated in terms of three core assumptions. These assumptions are appropriate foundations of any social theory of IR: they specify the nature of societal actors, the state, and the international system.
Assumption 1: The Primacy of Societal Actors The fundamental actors in international politics are individuals and private groups, who are on the average rational and risk-averse and who organize exchange and collective action to promote differentiated interests under constraints imposed by material scarcity, con¯icting values, and variations in societal in¯uence. 516International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Liberal theory rests on a ``bottom-up'' view of politics in which the demands of individuals and societal groups are treated as analytically prior to politics. Political action is embedded in domestic and transnational civil society, understood as an aggregation of boundedly rational individuals with differentiated tastes, social com- mitments, and resource endowments. Socially differentiated individuals de®ne their material and ideational interests independently of politics and then advance those interests through political exchange and collective action. 6Individuals and groups are assumed to act rationally in pursuit of material and ideal welfare. 7 For liberals, the de®nition of the interests of societal actors is theoretically central.
Liberal theory rejects the utopian notion that anautomaticharmony of interest exists among individuals and groups in society; scarcity and differentiation introduce an inevitable measure of competition. Where social incentives for exchange and collec- tive action are perceived to exist, individuals and groups exploit them: the greater the expected bene®ts, the stronger the incentive to act. In pursuing these goals, individu- als are on the average risk-averse; that is, they strongly defend existing investments but remain more cautious about assuming cost and risk in pursuit of new gains. What is true about people on the average, however, is not necessarily true in every case:
some individuals in any given society may be risk-acceptant or irrational.
Liberal theory seeks to generalize about the social conditions under which the behavior of self-interested actors converges toward cooperation or con¯ict. Con¯ict- ual societal demands and the willingness to employ coercion in pursuit of them are associated with a number of factors, three of which are relevant to this discussion:
divergent fundamental beliefs, con¯ict over scarce material goods, and inequalities in political power. Deep, irreconcilable differences in beliefs about the provision of public goods, such as borders, culture, fundamental political institutions, and local social practices, promote con¯ict, whereas complementary beliefs promote harmony and cooperation. Extreme scarcity tends to exacerbate con¯ict over resources by increasing the willingness of social actors to assume cost and risk to obtain them.
Relative abundance, by contrast, lowers the propensity for con¯ict by providing the opportunity to satisfy wants without inevitable con¯ict and giving certain individuals and groups more to defend. Finally, where inequalities in societal in¯uence are large, con¯ict is more likely. Where social power is equitably distributed, the costs and bene®ts of actions are more likely to be internalized to individualsÐfor example, through the existence of complex, cross-cutting patterns of mutually bene®cial inter- action or strong and legitimate domestic political institutionsÐand the incentive for selective or arbitrary coercion is dampened. By contrast, where power asymmetries permit groups to evade the costs of redistributing goods, incentives arise for exploit- ative, rent-seeking behavior, even if the result is inefficient for society as a whole. 8 6. This does not imply a ``pre-social'' conception of the individual unencumbered by nation, commu- nity, family, or other collective identities but only that these identities enter the political realm when individuals and groups engage in political exchange on the basis of them; see, for example, Coleman 1990.
7. Kant 1991, 44.
8. Milgrom and Roberts 1990, 86±87. Liberal Theory of International Politics517 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Assumption 2: Representation and State Preferences States (or other political institutions) represent some subset of domestic society, on the basis of whose interests state offõcials de®ne state preferences and act purpo- sively in world politics.
In the liberal conception of domestic politics, the state is not an actor but a repre- sentative institution constantly subject to capture and recapture, construction and reconstruction by coalitions of social actors. Representative institutions and practices constitute the critical ``transmission belt'' by which the preferences and social power of individuals and groups are translated into state policy. Individuals turn to the state to achieve goals that private behavior is unable to achieve efficiently. 9Government policy is therefore constrained by the underlying identities, interests, and power of individuals and groups (inside and outside the state apparatus) who constantly pres- sure the central decision makers to pursue policies consistent with their preferences.
This is not to adopt a narrowly pluralist view of domestic politics in which all individuals and groups have equal in¯uence on state policy, nor one in which the structure of state institutions is irrelevant. No government rests on universal or unbi- ased political representation; every government represents some individuals and groups more fully than others. In an extreme hypothetical case, representation might empower a narrow bureaucratic class or even a single tyrannical individual, such as an ideal-typical Pol Pot or Josef Stalin. Between theoretical extremes of tyranny and democracy, many representative institutions and practices exist, each of which privi- leges particular demands; hence the nature of state institutions, alongside societal interests themselves, is a key determinant of what states do internationally.
Representation, in the liberal view, is not simply a formal attribute of state institu- tions but includes other stable characteristics of the political process, formal or infor- mal, that privilege particular societal interests. Clientalistic authoritarian regimes may distinguish those with familial, bureaucratic, or economic ties to the governing elite from those without. Even where government institutions are formally fair and open, a relatively inegalitarian distribution of property, risk, information, or organi- zational capabilities may create social or economic monopolies able to dominate policy. Similarly, the way in which a state recognizes individual rights may shape opportunities for voice. 10Certain domestic representational processes may tend to select as leaders individuals, groups, and bureaucracies socialized with particular attitudes toward information, risk, and loss. Finally, cost-effective exit options, such as emigration, noncompliance, or the transfer of assets to new jurisdictions or uses, insofar as they constrain governments, may be thought of as substitutes for formal representation. 11 9. Representative political institutions and practices result from prior contracts and can generally be taken for granted in explaining foreign policy; but where the primary interests and allegiances of indi- viduals and private groups are transferred to subnational or supranational institutions empowered to repre- sent them effectively, a liberal analysis would naturally shift to these levels.
10. Doyle 1997, 251±300.
11. North and Thomas 1973, 87.
518International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Societal pressures transmitted by representative institutions and practices alter ``state preferences.'' This term designates an ordering among underlying substantive out- comes that may result from international political interaction. Here it is essentialÐ particularly given the inconsistency of common usageÐto avoid conceptual confu- sion by keeping state ``preferences'' distinct from national ``strategies,'' ``tactics,'' and ``policies,'' that is, the particular transient bargaining positions, negotiating de- mands, or policy goals that constitute the everyday currency of foreign policy. State preferences, as the concept is employed here, comprise a set of fundamental interests de®ned across ``states of the world.'' Preferences are by de®nition causally indepen- dent of the strategies of other actors and, therefore, prior to speci®c interstate politi- cal interactions, including external threats, incentives, manipulation of information, or other tactics. By contrast, strategies and tacticsÐsometimes also termed ``prefer- ences'' in game-theoretical analysesÐare policy options de®ned across intermediate political aims, as when governments declare an ``interest'' in ``maintaining the bal- ance of power,'' ``containing'' or ``appeasing'' an adversary, or exercising ``global leadership.'' 12Liberal theory focuses on the consequences for state behavior of shifts in fundamental preferences, not shifts in the strategic circumstances under which states pursue them.
Representative institutions and practices determine not merely which social coali- tions are represented in foreign policy, but how they are represented. Two distinc- tions are critical. First, states may act in either a unitary or ``disaggregated'' way. In many traditional areas of foreign policy, ``politics stops at the water's edge,'' and there is strong coordination among national officials and politicians. In other areas, the state may be ``disaggregated,'' with different elementsÐexecutives, courts, cen- tral banks, regulatory bureaucracies, and ruling parties, for exampleÐconducting semiautonomous foreign policies in the service of disparate societal interests. 13Sec- ond, domestic decision making may be structured so as to generate state preferences that satisfy a strong rationality condition, such as transitivity or strict expected utility maximization, or so as to satisfy only the weaker rationality criterion of seeking efficient means. Recently, formal theorists have derived speci®c conditions under which nonunitary state behavior can be analyzed ``as if '' it were unitary and rational, implying that much super®cially ``nonrational'' or ``nonunitary'' behavior should actually be understood in terms of shifting state preferences. 14 Taken together, assumptions 1 and 2 imply that states do not automatically maxi- mize ®xed, homogeneous conceptions of security, sovereignty, or wealth per se, as realists and institutionalists tend to assume. Instead they are, in Waltzian terms, ``func- tionally differentiated''; that is, they pursue particular interpretations and combina- tions of security, welfare, and sovereignty preferred by powerful domestic groups 12. The phrase ``country A changed its preferences in response to an action by country B'' is thus a misuse of the term as de®ned here, implying less than consistently rational behavior; see Sebenius 1991, 207.
13. See Slaughter 1995; and Keohane and Nye 1971.
14. Achen 1995. Liberal Theory of International Politics519 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris enfranchised by representative institutions and practices. 15As Arnold Wolfers, John Ruggie, and others have observed, the nature and intensity of national support for any state purposeÐeven apparently fundamental concerns like the defense of politi- cal and legal sovereignty, territorial integrity, national security, or economic welfareÐ varies decisively with the social context. 16It is not uncommon for states knowingly to surrender sovereignty, compromise security, or reduce aggregate economic wel- fare. In the liberal view, trade-offs among such goals, as well as cross-national differ- ences in their de®nition, are inevitable, highly varied, and causally consequential. 17 Assumption 3: Interdependence and the International System The con®guration of interdependent state preferences determines state behavior.
For liberals, state behavior re¯ects varying patterns of state preferences. States require a ``purpose,'' a perceived underlying stake in the matter at hand, in order to provoke con¯ict, propose cooperation, or take any other signi®cant foreign policy action. The precise nature of these stakes drives policy. This is not to assert that each state simply pursues its ideal policy, oblivious of others; instead, each state seeks to realizeitsdistinctive preferences under varying constraints imposed by the prefer- ences ofother states. Thus liberal theory rejects not just the realist assumption that state preferences must be treated as if naturally con¯ictual, but equally the institution- alist assumption that they should be treated as if they were partially convergent, compromising a collective action problem. 18To the contrary, liberals causally privi- lege variation in the con®guration of state preferences, while treating con®gurations of capabilities and information as if they were either ®xed constraints or endogenous to state preferences.
The critical theoretical link between state preferences, on the one hand, and the behavior of one or more states, on the other, is provided by the concept of policy interdependence. Policy interdependence is de®ned here as the set of costs and ben- e®ts created for foreign societies when dominant social groups in a society seek to realize their preferences, that is, the pattern of transnational externalities resulting from attempts to pursue national distinctive purposes. Liberal theory assumes that the pattern of interdependent state preferences imposes a binding constraint on state behavior.
Patterns of interdependence or externalities induced by efforts to realize state pref- erences can be divided into three broad categories, corresponding to the strategic situation (the pattern of policy externalities) that results. 19 Where preferences are naturally compatible or harmonious, that is, where the externalities of unilateral poli- 15. Ruggie 1983, 265.
16. Ruggie 1982, 1983.
17. On the contradictions within Waltz's effort to avoid these ambiguities, see Baldwin 1997, 21±22.
18. Keohane 1984, 10; 1986, 193. Note that these are all ``as if '' assumptions. The world must be consistent with them, but need not ful®ll them precisely.
19. See Stein 1982; Snidal 1985; and Martin 1992.
520International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris cies are optimal for others (or insigni®cant), there are strong incentives for coexist- ence with low con¯ict.
Where, by contrast, underlying state preferences are zero-sum or deadlocked, that is, where an attempt by dominant social groups in one country to realize their prefer- ences through state actionnecessarilyimposes costs (negative externalities) on domi- nant social groups in other countries, governments face a bargaining game with few mutual gains and a high potential for interstate tension and con¯ict. The decisive precondition for costly attempts at coercion, for example, is neither a particular con- ®guration of power, as realists assert, nor of uncertainty, as institutionalists maintain, but a con®guration of preferences con¯ictual enough to motivate willingness to ac- cept high cost and risk. 20In other words, intense con¯ict requires that an aggressor or revisionist state advance demands to which other states are unwilling to submit.
Revisionist preferencesÐunderlying, socially grounded interests in revising the sta- tus quoÐare distinct from revisionist ``strategies,'' that is, a need to alter the status quo to protect enduring interests under new strategic circumstances. Liberals focus on the former, realists (and institutionalists) on the latter. Hence while both theories predict security con¯ict, they do so under different circumstances. For example, in- creased military spending in response to an adversary's arms buildup is a change in strategy with ®xed preferences consistent with realism; increased spending initiated by a new ruling elite ideologically committed to territorial aggrandizement is a pref- erence-induced change in strategy consistent with liberalism. 21 Where, ®nally, motives are mixed such that an exchange of policy concessions through coordination or precommitment can improve the welfare of both parties relative to unilateral policy adjustment (i.e., a collective action problem), states have an incentive to negotiate policy coordination. Games like coordination, assurance, prisoner's dilemma, and suasion have distinctive dynamics, as well as impose pre- cise costs, bene®ts, and risks on the parties. Within each qualitative category, incen- tives vary further according to the intensity of preferences.
For liberals, the form, substance, and depth of cooperation depends directly on the nature of these patterns of preferences. Hence where ``Pareto-inefficient'' outcomes are observedÐtrade protection is a commonly cited exampleÐliberals turn ®rst to countervailing social preferences and unresolved domestic and transnational distribu- tional con¯icts, whereas institutionalists and realists, respectively, turn to uncertainty and particular con®gurations of interstate power. 22 Liberal Theory as Systemic Theory These liberal assumptions, in particular the thirdÐin essence, ``what states want is the primary determinant of what they do''Ðmay seem commonsensical, even tauto- logical. Yet mainstream IR theory has uniformly rejected such claims for the past 20. Note that some rationalist analyses dismiss such risk-acceptant preferences as ``irrational''; see Fearon 1995.
21. For example, Van Evera 1990±91, 32.
22. Grieco's study of NTB regulation is discussed later. Liberal Theory of International Politics521 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris half-century. At the heart of the two leading contemporary IR theories, realism and institutionalism, is the belief that state behavior hasironicconsequences. 23Power politics and informational uncertainty constrain states to pursue second- and third- best strategies strikingly at variance with their underlying preferences. 24Thus vary- ing state preferences should be treated as if they were irrelevant, secondary, or endog- enous. In his classic de®nition of realism Morgenthau contrasts it to ``two popular fallacies: the concern with motives and the concern with ideological preferences.'' 25 Neorealist Waltz's central objection to previous, ``reductionist'' theories is that in world politics ``results achieved seldom correspond to the intentions of actors''; hence ``no valid generalizations can logically be drawn'' from an examination of inten- tions. 26Though the interests it assumes are different, Keohane's institutionalism re- lies on a similar as if assumption: it ``takes the existence of mutual interests as given and examines the conditions under which they will lead to cooperation.'' 27In short, Powell observes that ``structural theories . . . lack a theory of preferences over out- comes.'' 28What states do is primarily determined by strategic considerationsÐwhat they can get or what they knowÐwhich in turn re¯ect their international political environment. In short, variation in means, not ends, matters most. 29 Liberal theory reverses this assumption: Variation in ends, not means, matters most.Realists and institutionalists, as well as formal theorists who seek to integrate the two, criticize this core liberal assumption because it appears at ®rst glance to rest on what Waltz terms a ``reductionist'' rather than a ``systemic'' understanding of IR.
In other words, liberalism appears to be a purely ``domestic'' or ``unit-level'' theory that ignores the international environment. In particular, realists are skeptical of this view because it appears at ®rst glance to be grounded in the utopian expectation that every state can do as it pleases. This commonplace criticism is erroneous for two important reasons.
First, state preferences may re¯ect patterns of transnationalsocietalinteraction.
While state preferences are (by de®nition) invariant in response to changing inter- state political and strategic circumstances, they may well vary in response to a chang- ing transnationalsocialcontext. In the political economy for foreign economic policy, 23. What about Marxism? Marxism provides distinctive normative insights (Doyle 1997), but its non- teleological positive assumptionsÐthe centrality of domestic economic interests, the importance of trans- national interdependence, the state as a representative of dominant social forcesÐare quite compatible with this restatement of liberalism. For examples, see the contribution by Frieden and Rogowski in Keo- hane and Milner 1996.
24. Waltz 1979, 60±67, 93±97.
25. The resulting ``autonomy of the political'' in geopolitics gives realism its ``distinctive intellectual and moral attitude''; see Morgenthau 1960, 5±7. The fact that Morgenthau distinguished nonrealist ele- ments of his own thought illustrates a further danger of de®ning realism not in terms of social scienti®c assumptions, but in terms of its intellectual history, that is, assuming that everything a ``realist'' wrote constitutes a coherent realist theory; see Morgenthau 1960, 5, 227.
26. Waltz follows Morgenthau almost verbatim: ``Neo-realism establishes the autonomy of interna- tional politics and thus makes a theory about it possible''; see Waltz 1979, 29, and also 65±66, 79, 90, 108±12, 196±98, 271.
27. See Keohane 1984, 6; and Hellmann and Wolf 1993.
28. Powell 1994, 318.
29. Ruggie 1983, 107±10.
522International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris for example, social demands are derived not simply from ``domestic'' economic assets and endowments, but from the relative position of those assets and endow- ments in global markets. Similarly, the position of particular values in a transnational cultural discourse may help de®ne their meaning in each society. In this regard, liberalism does not draw a strict line between domestic and transnational levels of analysis. 30 A second and more Waltzian reason why the charge of ``reductionism'' is errone- ous is that according to liberal theory the expected behavior of any single stateÐthe strategies it selects and the systemic constraints to which it adjustsÐre¯ect not sim- ply its own preferences, but the con®guration of preferences ofallstates linked by patterns of signi®cant policy interdependence. National leaders must always think systemically about their position within a structure composed of the preferences of other states. Since the pattern of and interdependence among state preferences, like the distribution of capabilities and the distribution of information and ideas, lies outside the control of any single state, it conforms to Waltz's own de®nition of sys- temic theory, whereby interstate interactions are explained by reference to ``how [states] stand in relation to one another.'' 31Hence the causal preeminence of state preferences does not imply that states always get what they want.
One implication of liberalism's systemic, structural quality is that, contra Waltz, it can explain not only the ``foreign policy'' goals of individual states but the ``sys- temic'' outcomes of interstate interactions. That systemic predictions can follow from domestic theories of preferences should be obvious simply by inspecting the litera- ture on the democratic peace. 32In addition, by linking social purpose to the symme- try and relative intensity of state preferences, liberalism offersa distinctive concep- tion of political powerin world politicsÐsomething traditionally considered unique to realist theory.
The liberal conception of power is based on an assumptionmoreconsistent with basic theories of bargaining and negotiation than those underlying realism: namely that the willingness of states to expend resources or make concessions is itself primar- ily a function of preferences, not capabilities. In this viewÐthe foundation of Nash bargaining analysis, which has been extended to IR by Albert Hirshman, Keohane, Joseph Nye, and othersÐbargaining outcomes re¯ect the nature and relative inten- sity of actor preferences. 33The ``win-set,'' the ``best alternative to negotiated agree- ment,'' the pattern of ``asymmetrical interdependence,'' the relative opportunity cost of forgoing an agreementÐall these core terms in negotiation analysis refer to differ- ent aspects of the relationship of bargaining outcomes on the preference functions of the actors. The capability-based power to threaten central to realism enters the equa- tion in speci®c circumstances and only through linkage to threats and side-payments.
Even where capability-based threats and promises are employed, preference-based determinants of the tolerance for bearing bargaining costs, including differential tem- 30. For example, see Gourevitch 1976.
31. Ruggie 1983, 90±91.
32. For a more general argument, see Elman 1996, especially 58±59.
33. See Harsanyi 1977; Hirshman 1945; and Keohane and Nye 1987, 733. Liberal Theory of International Politics523 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris poral discount rates, risk-acceptance, and willingness to accept punishment, remain central. 34 The liberal claim that the pattern of interdependence among state preferences is a primary determinant not just of individual foreign policies, but of systemic out- comes, is commonsensical. Nations are rarely prepared to expend their entire eco- nomic or defense capabilities, or to mortgage their entire domestic sovereignty, in pursuit of any single foreign policy goal. Few wars are total, few peaces Carthagin- ian. Treating the willingness of states to expend resources in pursuit of foreign policy goals as a strict function of existing capabilities thus seems unrealistic. On the mar- gin, the binding constraint is instead generally ``resolve'' or ``determination''Ðthe willingnessof governments to mobilize and expend social resources for foreign policy purposes.
Extensive empirical evidence supports this assumption. Even in ``least likely'' cases, where political independence and territorial integrity are at stake and military means are deployed, relative capabilities do not necessarily determine outcomes. A ``strong preference for the issue at stake can compensate for a de®ciency in capabili- ties,'' as demonstrated by examples like the Boer War, Hitler's remilitarization of the Rhineland, Vietnam, Afghanistan, and Chechnya. In each case the relative intensity of state preferences reshaped the outcome to the advantage of the ``weak.'' 35Such examples suggest that the liberal view of power politics, properly understood, gener- ates plausible explanations not just of harmony and cooperation among nations, but of the full range of phenomena central to the study of world politics, from peaceful economic exchange to brutal guerrilla warfare. Variants of Liberal Theory Like their realist and institutionalist counterparts, the three core liberal assumptions introduced earlier are relatively thin or content-free. Taken by themselves, they do not de®ne a single unambiguous model or set of hypotheses, not least because they do not specify precise sources of state preferences. Instead they support three sepa- rate variants of liberal theory, termed here ideational, commercial, and republican liberalism. Each rests on a distinctive speci®cation of the central elements of liberal theory: social demands, the causal mechanisms whereby they are transformed into state preferences, and the resulting patterns of national preferences in world politics.
Ideational liberalism focuses on the compatibility of social preferences across funda- mental collective goods like national unity, legitimate political institutions, and socio- economic regulation. Commercial liberalism focuses on incentives created by oppor- tunities for transborder economic transactions. Republican liberalism focuses on the nature of domestic representation and the resulting possibilities for rent-seeking be- havior.
34. See Raiffa 1982; Sebenius 1991; Evans, Jacobson, and Putnam 1993; and Keohane and Nye 1977.
35. See Morrow 1988, 83±84; and Mack 1975.
524International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Ideational Liberalism: Identity and Legitimate Social Order Drawing on a liberal tradition dating back to John Stuart Mill, Giuseppe Mazzini, and Woodrow Wilson, ideational liberalism views the con®guration of domestic so- cial identities and values as a basic determinant of state preferences and, therefore, of interstate con¯ict and cooperation. ``Social identity'' is de®ned as the set of prefer- ences shared by individuals concerning the proper scope and nature of public goods provision, which in turn speci®es the nature of legitimate domestic order by stipulat- ing which social actors belong to the polity and what is owed them. 36Liberals take no distinctive position on the origins of social identities, which may result from histori- cal accretion or be constructed through conscious collective or state action, nor on the question of whether they ultimately re¯ect ideational or material factors. 37 Three essential elements of domestic public order often shaped by social identities are geographical borders, political decision-making processes, and socioeconomic regulation. Each can be thought of as a public or club good; the effectiveness of each typically requires that it be legislated universally across a jurisdiction. 38Recall that for liberals, even the defense of (or, less obvious but no less common, the willing compromise of) territorial integrity, political sovereignty, or national security is not an end in itself, but a means of realizing underlying preferences de®ned by the de- mands of societal groups. According to assumption 2, social actors provide support to the government in exchange for institutions that accord with their identity-based preferences; such institutions are thereby ``legitimate.'' Foreign policy will thus be motivated in part by an effort to realize social views about legitimate borders, politi- cal institutions, and modes of socioeconomic regulation.
The consequences of identity-based preferences for IR depend, according to as- sumption 3, on the nature of transnational externalities created by attempts to realize them. Where national conceptions of legitimate borders, political institutions, and socioeconomic equality are compatible, thus generating positive or negligible exter- nalities, harmony is likely. Where national claims can be made more compatible by reciprocal policy adjustment, cooperation is likely. 39Where social identities are in- compatible and create signi®cant negative externalities, tension and zero-sum con- ¯ict is more likely. Parallel predictions about international politics follow from each of the three essential sources of ideational preferences: national, political, and socio- economic identity. 40Let us brie¯y consider each. 36. This concept is similar but narrower than Ruggie's ``legitimate social purpose'' and Katzenstein's ``collective identity''; see Ruggie 1983; Katzenstein 1996a, 6.
37. Here is a point of tangency with recent constructivist work; see Katzenstein 1996a, 5; Finnemore 1996, 27±28; and Wendt 1996, 7. Whether thefundamentalsources of societal preferences are ideational is the focus of a debate among general social theorists for which IR theorists lack any distinctive compara- tive advantage.
38. Fearon 1995.
39. Oye 1986.
40. Liberal theory need not and in general does not claim that shared identities emerge from chance interactions among ``atomistic'' individuals, or that nationality must re¯ect ``timeless'' factors like lan- guage, religion, or ethnicity. Identities need only be translated into political preferences through individual and group commitments; compare Finnemore 1996, 147. Liberal Theory of International Politics525 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris The ®rst fundamental type of social identity central to the domestic legitimacy of foreign policy comprises the set offundamental societal preferences concerning the scope of the ``nation,'' which in turn suggest the legitimate location of national bor- ders and the allocation of citizenship rights.The roots of national identity may re¯ect a shared set of linguistic, cultural, or religious identi®cations or a shared set of histori- cal experiencesÐoften interpreted and encouraged by both private groups and state policy. In explaining con¯ict and cooperation over borders and citizenship, realism stresses the role of relative power, and institutionalism stresses the role of shared legal norms, whereas ideational liberalism stresses the extent to which borders coin- cide with the national identities of powerful social groups. 41Where borders coincide with underlying patterns of identity, coexistence and even mutual recognition are more likely. Where, however, inconsistencies between borders and underlying pat- terns of identity exist, greater potential for interstate con¯ict exists. In such circum- stances, some social actors and governments are likely to have an interest in uniting nationals in appropriate jurisdictions, perhaps through armed aggression or seces- sion; other governments may intervene militarily to promote or hinder such efforts.
More than twenty years before con¯ict reemerged in the former Yugoslavia, Myron Weiner termed the resulting disruptive international behaviorÐa recurrent complex of aggression, exacerbation of nationalist ideologies, offensive alliance formation, and risk acceptance in foreign policyÐthe ``Macedonian syndrome.'' 42 Strong empirical evidence supports the proposition that disjunctures between bor- ders and identities are important determinants of international con¯ict and coopera- tion. In early modern Europe, interstate con¯ict re¯ected in part the competition between two communal religious identitiesÐeach of which, at least until domestic and international norms of tolerance spread, was perceived as a threat to the other. 43 Over the last century and a half, from mid-nineteenth-century nationalist uprisings to late-twentieth-century national liberation struggles, the desire for national autonomy constitutes the most common issue over which wars have been fought and great power intervention has taken place; the Balkan con¯icts preceding World War I and succeeding the Cold War are only the most notorious examples. 44The post±World War II peace in Western Europe and the reintegration of Germany into Europe were assisted by the reestablishment of borders along ethnic lines in the Saar and Alsace- Lorraine, as well as much of Eastern Europe. Even leading realists now concedeÐ though it in no way follows from realist premisesÐthat disputes between ``inter- mingled or divided nationalities'' are the most probable catalyst for war in Eastern Europe and the former Soviet Union. 45 41. See Jackson 1990; and Gilpin 1989.
42. See Weiner 1971; and Pillar 1983, 24±26.
43. Philpott 1996.
44. Holsti 1991. Even those who stress the absence of credible commitment mechanisms in explaining nationalist con¯icts concede the importance of underlying identities; see Fearon 1996, 56.
45. To be sure, Mearsheimer heroically asserts that nationalism is a ``second-order force in interna- tional politics,'' with a ``largely . . . international'' cause, namely multipolarity; see Mearsheimer 1990, 21.
This is testable: Is violent nationalism more of an international problem in Central and Eastern Europe than in Western Europe, as liberalism predicts, or an equal problem in both areas, as realism predicts?
526International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris A second fundamental type of social identity central to foreign policymaking isthe commitment of individuals and groups to particular political institutions.Realism accords theoretical weight to domestic regime type only insofar as it in¯uences the distribution of capabilities, institutionalism only insofar as it contributes to the cer- tainty of coordination and commitment. Ideational liberalism, by contrast, maintains that differences in perceptions of domestic political legitimacy translate into patterns of underlying preferences and thus variation in international con¯ict and coopera- tion. Where the realization of legitimate domestic political order in one jurisdiction threatens its realization in others, a situation of negative externalities, con¯ict is more likely. Where the realization of national conceptions of legitimate decision making reinforce or can be adjusted to reinforce one another, coexistence or coopera- tion is more likely. 46 Plausible examples abound. Thucydides accords an important role to con¯ict be- tween oligarchs and democrats in alliance formation during the Peloponnesian War.
In the seventeenth and eighteenth centuries, absolutist kings fought to establish dy- nastic claims and religious rule; in the nineteenth century, they cooperated to pre- serve monarchical rule against societal pressures for reform. 47The twentieth century has witnessed a struggle between governments backing fascist, communist, and lib- eral ideologies, as well as more recently a resurgence of religious claims and the emergence of a group of developed countries that share democratic norms of legiti- mate dispute resolutionÐa plausible explanation for the ``democratic peace'' phenom- enon. 48A more complex pattern, consistent with the preceding assumptions, may emerge when individual domestic actorsÐmost often national executivesÐexploit the legitimacy of particular international policies as a ``two-level'' instrument to increase their in¯uence over the domestic polity. This is a constant theme in modern world politics, from Bismarck's manipulation of domestic coalitions to the current use of monetary integration by today's European leaders to ``strengthen the state'' at home.
49 A third fundamental type of social identity central to foreign policyis the nature of legitimate socioeconomic regulation and redistribution.Modern liberal theory (as opposed to the laissez faire libertarianism sometimes invoked by critics as quintes- sentially ``liberal'') has long recognized that societal preferences concerning the na- ture and level of regulation impose legitimate limits on markets. 50 In a Polanyian vein, Ruggie recently reminds us that domestic and international markets are embed- ded in local social compromises concerning the provision of regulatory public goods. 51 Such compromises underlie varying national regulations on immigration, social wel- fare, taxation, religious freedom, families, health and safety, environmental and 46. Governments may actually have altruistic preferences (see Lumsdaine 1993) or may seek to create an international environment conducive to the realization of domestic values (see Moravcsik 1995).
47. See Nolt 1990; and Barkin and Cronin 1994.
48. Russett 1993, 30±38.
49. See Evans, Jacobson, and Putnam 1994; Wehler 1985; and Moravcsik 1994.
50. Holmes 1995.
51. Ruggie 1992. Liberal Theory of International Politics527 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris consumer protection, cultural promotion, and many other public goods increasingly discussed in international economic negotiations.
In the liberal view, state preferences concerning legitimate socioeconomic prac- tices shape interstate behavior when their realization imposes signi®cant transborder externalities. Evidence from the European Community (EC) suggests that substantial prior convergence of underlying values is a necessary prerequisite for cooperation in regulatory issue areas like environmental and consumer protection, many tax and social policies, immigration, and foreign policy, as well as for signi®cant surrenders of sovereign decision making to supranational courts and bureaucracies. Regulatory pluralism limits international cooperation, in particular economic liberalization.
Courts, executives, and parliaments mutually recognize ``legitimate differences'' of policy in foreign jurisdictions. 52Concerns about the proper balance between policy coordination and legitimate domestic regulation are giving rise to even more com- plex forms of cooperation. Hence regulatory issues play an increasingly important role in international economic negotiations such as the 1992 initiative of the EC, the Uruguay Round of GATT, NAFTA, and the U.S.±Japan Structural Impediments Ini- tiative. 53 Commercial Liberalism: Economic Assets and Cross-Border Transactions Commercial liberalism explains the individual and collective behavior of states based on the patterns of market incentives facing domestic and transnational economic actors. At its simplest, the commercial liberal argument is broadly functionalist:
Changes in the structure of the domestic and global economy alter the costs and bene®ts of transnational economic exchange, creating pressure on domestic govern- ments to facilitate or block such exchanges through appropriate foreign economic and security policies.
It is tempting, particularly for critics, to associate commercial liberal theory with ideological support for free trade. Yet as theory rather than ideology, commercial liberalism doesnotpredict that economic incentives automatically generate univer- sal free trade and peaceÐa utopian position critics who treat liberalism as an ideol- ogy often wrongly attribute to itÐbut instead stresses the interaction between aggre- gate incentives for certain policies and obstacles posed by domestic and transnational distributional con¯ict. 54The greater the economic bene®ts for powerful private ac- tors, the greater their incentive, other things being equal, to press governments to facilitate such transactions; the more costly the adjustment imposed by economic interchange, the more opposition is likely to arise. Rather than assuming that market structure always creates incentives for cooperation among social actors as well as states, or focusing exclusively on those issue areas where it does, as do some liberal 52. Burley 1992.
53. Ruggie 1995.
54. Compare Gilpin 1975, 27.
528International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris ideologies, liberal IR theory focuses on market structure as a variable creating incen- tives for both openness and closure.
Accordingly, many commercial liberal analyses start with aggregate welfare gains from trade resulting from specialization and functional differentiation, then seek to explain divergences from foreign economic and security policies that would maxi- mize those gains. To explain the rejection of aggregate gains, commercial liberals from Adam Smith to contemporary ``endogenous'' tariff theorists look to domestic and international distributional con¯icts. The resulting commercial liberal explana- tion of relative-gains seeking in foreign economic policy is quite distinct from that of realism, which emphasizes security externalities and relative (hegemonic) power, or that of institutionalism, which stresses informational and institutional constraints on interstate collective action. 55 One source of pressure for protection is domestic distributional con¯ict, which arises when the costs and bene®ts of national policies are not internalized to the same actors, thus encouraging rent-seeking efforts to seek personal bene®t at the expense of aggregate welfare. In this view, uncompetitive, monopolistic, or undiversi®ed sectors or factors lose the most from liberalization and have an incentive to oppose it, inducing a systematic divergence from laissez faire policies. Smith himself reminds us that ``the contrivers of [mercantilism are] the producers, whose interest has been so carefully attended to . . . our merchants and manufacturers''Ða view echoed by many liberals since. 56Recent research supports the view that protectionist pressure from rent-seeking groups is most intense precisely where distributional concerns of concentrated groups are strongest, for example, when industries are uncompetitive or irreversible investments (asset speci®city) impose high adjustment costs on concen- trated interests. Free trade is more likely where strong competitiveness, extensive intra-industry trade, or trade in intermediate goods, large foreign investments, and low asset speci®city internalize the net bene®ts of free trade to powerful actors, thus reducing the in¯uence of net losers from liberalization. 57 The distributional consequences of global market imperfections create a second sort of disjuncture between the aggregate bene®ts of economic interdependence and national policies. Modern trade theory identi®es incentives for strategic behavior where increasing returns to scale, high ®xed costs, surplus capacity, or highly concen- trated sources of supply render international markets imperfectly competitive. Firms hoping to create (or break into) a global oligopoly or monopoly, for example, may have an incentive to engage in predatory dumping abroad while seeking domestic protection and subsidization at home, even though this imposes costs on domestic consumers and foreign producers. Such policies can create substantial international con¯ict, since government intervention to assist ®rms can improve welfare for soci- ety as a whole, though usually not for all societies involved. 58 55. Grieco 1988; Gowa 1989; and Keohane 1984.
56. Ekelund and Tollison 1981, 25.
57. Milner 1988.
58. Keohane and Milner 1996, 39. Liberal Theory of International Politics529 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Commercial liberalism has important implications for security affairs as well. Trade is generally a less costly means of accumulating wealth than war, sanctions, or other coercive means, not least due to the minimization of collateral damage. Yet govern- ments sometimes have an incentive to employ coercive means to create and control international markets. To explain this variation, domestic distributional issues and the structure of global markets are again critical. Commercial liberals argue that the more diversi®ed and complex the existing transnational commercial ties and produc- tion structures, the less cost-effective coercion is likely to be. 59Cost-effective coer- cion was most pro®table in an era where the main sources of economic pro®t, such as farmland, slave labor, raw materials, or formal monopoly, could be easily controlled in conquered or colonial economies. Yet economic development tends to increase the material stake of social actors inexistinginvestments, thereby reducing their willing- ness to assume the cost and risk of coercion through war or sanctions. 60As produc- tion becomes more specialized and efficient and trading networks more diverse and complex, political extraction (for example, war and embargoes) become more disrup- tive, and pro®table monopolies over commercial opportunities become more difficult to establish. Both cross-cultural anthropological evidence and modern cross-national evidence link warfare to the existence of monopolizable resources; over the past century, it has remained the major determinant of boundary disputes. 61Yet the advent of modern industrial networks, particularly those based on postindustrial informa- tional exchange, has increased the opportunity costs of coercive tactics ranging from military aggression to coercive nationalization. 62 Republican Liberalism: Representation and Rent Seeking While ideational and commercial liberal theory, respectively, stress demands result- ing from particular patterns of underlying societal identities and economic interests, republican liberal theory emphasizes the ways in which domestic institutions and practices aggregate those demands, transforming them into state policy. The key variable in republican liberalism is the mode of domestic political representation, which determines whose social preferences are institutionally privileged. When po- litical representation is biased in favor of particularistic groups, they tend to ``cap- ture'' government institutions and employ them for their ends alone, systematically passing on the costs and risks to others. The precise policy of governments depends on which domestic groups are represented. The simplest resulting prediction is that policy is biased in favor of the governing coalition or powerful domestic groups.
A more sophisticated extension of this reasoning focuses on rent seeking. When particularistic groups are able to formulate policy without necessarily providing off- setting gains for society as a whole, the result is likely to be inefficient, suboptimal 59. Van Evera 1990.
60. Realist theory, with its assumptions of a unitary state and ®xed preferences, simply presumes that the greater the wealth and power of a state, the less the marginal cost of deploying it, thus reducing power to capabilities. Liberal theory suggests different predictions. The two are testable.
61. See Huth 1996; and Keeley 1996.
62. See Van Evera 1990, 14±16, 28±29; and Kaysen 1990, 53.
530International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris policies from the aggregate perspectiveÐone form of which may be costly interna- tional con¯ict. 63 While many liberal arguments are concerned with the seizure of state institutions by administrators (rulers, armies, and bureaucracies), similar argu- ments apply to privileged societal groups that ``capture'' the state, according to as- sumption 2, or simply act independently of it. If, following assumption 1, most indi- viduals and groups in society, while acquisitive, tend also to be risk-averse (at least where they have something to lose), the more unbiased the range of domestic groups represented, the less likely they will support policies that impose high net costs or risks on a broad range of social actors. Thus aggressive behaviorÐthe voluntary recourse to costly or risky foreign policyÐis most likely in undemocratic or inegali- tarian polities where privileged individuals can easily pass costs on to others. 64 This does not, of course, imply the existence of a one-to-one correspondence be- tween the breadth of domestic representation and international political or economic cooperation, for two reasons. First, in speci®c cases, elite preferences may be more convergent than popular ones. If commercial or ideational preferences are con¯ict- ual, for example where hypernationalist or mercantilist preferences prevail, a broad- ening of representation may have the opposite effectÐa point to which I will return.
Elites, such as those leaders that constructed the Concert of Europe or similar arrange- ments among African leaders today, have been attributed to their convergent interests in maintaining themselves in office. Second, the extent of bias in representation, not democratic participation per se, is the theoretically critical point. Direct representa- tion may overrepresent concentrated, organized, short-term, or otherwise arbitrarily salient interests. Predictable conditions exist under which governing elites may have an incentive to represent long-term social preferences more unbiasedly than does broad opinion. 65 Despite these potential complexities and caveats, republican liberalism nonethe- less generates parsimonious predictions where con¯ictual policies impose extremely high costs and risks on the majority of individuals in domestic society. With respect to extreme but historically common policies like war, famine, and radical autarky, fair representation tends to inhibit international con¯ict. In this way, republican lib- eral theory has helped to explain phenomena as diverse as the ``democratic peace,'' modern anti-imperialism, and international trade and monetary cooperation. Given the prima facie plausibility of the assumption that major war imposes net costs on society as a whole, it is not surprising that the prominent republican liberal argument concerns the ``democratic peace,'' which one scholar has termed ``as close as any- thing we have to a law in international relations''Ðone that applies to tribal societies as well as to modern states. 66Liberal democratic institutions tend not to provoke such wars because in¯uence is placed in the hands of those who must expend blood and treasure and the leaders they choose. 67 63. Ekelund and Tollison 1981.
64. Milgrom and Roberts 1990.
65. See Keohane and Milner 1996, 52±53; and Wooley 1992.
66. Levy 1988, 662.
67. By analogy to Hirshleifer 1987. Liberal Theory of International Politics531 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris Often overlooked is the theoretical corollary of ``democratic peace'' theory: a re- publican liberal theory of war that stresses abnormally risk-acceptant leaders and rent-seeking coalitions. Substantial evidence shows that the aggressors who have provoked modern great power wars tend either to be risk-acceptant individuals in the extreme or individuals well able to insulate themselves from the costs of war or both.
Most leaders initiating twentieth-century great power wars lost them; Adolf Hitler and Saddam Hussein, for example, initiated con¯icts against coalitions far more powerful than their own. 68 In the same vein, Jack Snyder has recently deepened Hobson's classic rent-seeking analysis of imperialismÐwhereby the military, uncom- petitive foreign investors and traders, jingoistic political elites, and others who ben- e®t from imperialism are particularly well-placed to in¯uence policyÐby linking unrepresentative and extreme outcomes to logrolling coalitions. Consistent with this analysis, the highly unrepresentative consequences of partial democratization, com- bined with the disruption of rapid industrialization and incomplete political socializa- tion, suggest that democratizing states, if subject to these in¯uences, may be particu- larly war prone. Such ®ndings may challenge some variants of liberal ideology but are consistent with liberal theory. 69 The link between great-power military aggression and small-group interests in nonrepresentative states implies neither unceasing belligerence by autocratic re- gimes nor unquestioning paci®sm by democratic ones. Enlightened despotism or democratic aggression remains possible. The more precise liberal prediction is thus that despotic power, bounded by neither law nor representative institutions, tends to be wielded in a morearbitrarymanner by a wider range of individuals, leading both to a wider range of expected outcomes and a more con¯ictual average. Nonetheless, liberal theory predicts that democratic states may provoke preventive wars in re- sponse to direct or indirect threats, against very weak states with no great power allies, or in peripheral areas where the legal and political preconditions for trade and other forms of pro®table transnational relations are not yet in place. 70 Scholars also often overlook precise analogs to the ``democratic peace'' in matters of political economy. The liberal explanation for the persistence of illiberal commer- cial policies, such as protection, monetary instability, and sectoral subsidization, where such policies manifestly undermine the general welfare of the population, is pressure from powerful domestic groups. 71Thus in the liberal view the creation and mainte- nance of regimes assuring free trade and monetary stability result not primarily from common threats to national security or appropriate international institutions, but from the ability of states to overcome domestic distributional con¯icts in a way supportive of international cooperation. This may ultimately re¯ect the economic bene®ts of doing so, as commercial liberal theory suggests, but it can also be decisively helped or hindered by biases in representative institutions. Where such biases favor shel- tered groups, and substantial misrepresentation of this type is seen as endemic to 68. See Kaysen 1990, 59; and Mueller 1991, 23±44.
69. See Mans®eld and Snyder 1995; Snyder 1991; and Van Evera 1990, 18, 20.
70. Hopkins 1980.
71. For an overview, see Keohane and Milner 1996.
532International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris most contemporary representative institutions, rent-seeking groups are likely to gain protection through tariffs, subsidies, favorable regulation, or competitive devalua- tion. Where policymakers are insulated from such pressures, which may involve less democratic but more representative institutions, or where free trade interests domi- nate policy, open policies are more viable. 72 Broader Implications of Liberal Theory Do labels matter? I have explored three variants of liberal theory that share a set of assumptions. What is gained by subsuming them under a single rubric, as proposed here?
To demonstrate its utility for empirical research and theoretical inquiry, a paradig- matic restatement such as this must meet four criteria. First, its assumptions should highlight unexplored conceptual connections among previously unrelated liberal hy- potheses. Second, it should clearly de®ne its own conceptual boundaries in a manner conforming to fundamental social theory, in this case clearly distinguishing liberal hypotheses from ideologically or historically related hypotheses based on different social scienti®c assumptions. Third, it should reveal anomalies in previous theories and methodological weaknesses in previous testing, creating new presumptions about the proper theories and methods that structure empirical research. Fourth, it should de®ne how the theory in question can be combined rigorously rather than randomly with other theories to form coherent multicausal explanations.
Liberalism as a General Theory: Parsimony and Coherence One advantage of this restatement is that it suggests a theory of world politics that parsimoniously connects a wide range of distinctive and previously unrelated hypoth- eses concerning areas unexplained by existing theories. These hypotheses are not limited to cooperation among liberal states, but subsume liberal and nonliberal poli- ties, con¯ictual and cooperative situations, security and political economy issues, and both individual foreign policy and aggregate behavior. Its key causal mecha- nisms can be generalized to many issue areas. Thus liberal theory challenges the conventional presumption that realism is the most encompassing and parsimonious of major IR theories. Although not all liberal theories are easy to specify, hypotheses about endogenous tariff setting, the democratic peace, and nationalist con¯ict sug- gest that liberalism generates many empirical arguments as powerful, parsimonious, and ``efficient'' as those of realism. 73 Not only does liberal theory apply across a wide domain of circumstances, but its three variantsÐideational, commercial, and republican liberalismÐare stronger taken 72. See Wooley 1992; Bailey et al. 1997; contributions by Garrett and Lange and by Haggard and Max®eld in Keohane and Milner 1996; and Moravcsik 1994.
73. On the efficiency criterion, see King, Keohane, and Verba 1994, 182±87. Liberal Theory of International Politics533 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris together than separately. Not only do they share assumptions and causal mecha- nisms, but their empirical implications aggregate in interesting ways. It is widely accepted, for example, that economic development has a strong in¯uence on the viability of democratic governance, with its paci®c implications; liberal democratic governments tend in turn to support commerce, which promotes economic develop- ment. 74Karl Deutsch, Ernst Haas, and Nye, among many others, have explored how economic interaction can lead to transnational communication and the dissemination of scienti®c information, which may in turn promote secularizing cognitive and ideo- logical change. 75 Liberal theories can be analytically reinforcing even where they do not make par- allel predictions. Anomalies within one variant of liberal theory may be resolved by considering other variants. Positive movement along one liberal dimensionÐ patterns of national identity, democratic participation, or transnational economic trans- actionsÐmay condone or exacerbate the negative distortions along another liberal dimension. 76Norman Angell, whose commercial liberal claims are often parodied by secondhand critics, maintained that his well-known ``unpro®tability of war'' thesis in no way implies ``the impossibility of war,'' a doctrine he dismissed for republican liberal reasons as a ``ridiculous myth.'' 77 Where representative bias permits rent- seeking groups to control policy, aggregate incentives for welfare-improving trade are likely to have less effect. Indeed, recent studies reveal that the correlation be- tween economic interdependence and peace holds only (or most strongly) among liberal states. 78Conversely, where democratization heightens socioeconomic inequal- ity, nationalist cleavages, uneven patterns of gains, and losses due to interdependence or extreme heterogeneity of interestsÐas may have occurred in the former Yugosla- viaÐit may exacerbate international economic and political con¯ict. 79Such interac- tion effects among liberal factors offer a promising area for more detailed analysis.
Liberal theory also illuminates at least three major phenomena for which realism and institutionalism offer few, if any, predictionsÐanother indicator of greater parsi- mony. First,liberal theory provides a plausible theoretical explanation for variation in the substantive content of foreign policy. Neither realism nor institutionalism ex- plains the changing substantive goals and purposes over which states con¯ict and cooperate; both focus instead on formal causes, such as relative power or issue den- sity, and formal consequences, such as con¯ict and cooperation per se.
80By contrast, liberal theory provides a plausible explanation not just for con¯ict and cooperation, 74. Huntington 1991, 46±72.
75. See Deutsch 1954; Haas 1989; and Nye 1988.
76. Realist critics tend to overlook this. Howard's brilliant polemic against liberal theories of war often employs one liberal theory to debunk another; for example, the existence of nationalist irredentism is evidence against the claim that greater economic development and democratization lead to peace; see Howard 1986, 98±99, 130±31; compare Mans®eld and Snyder 1995.
77. Angell 1933, 53, 268±70.
78. Oneal 1996.
79. Fearon 1996.
80. Yet Ruggie concedes too much when he observes that ``power may predict the form of the interna- tional order, but not itscontent,'' because liberal theory does help predict bargaining outcomes and institu- tional form; see Ruggie 1982, 382.
534International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris but for the substantive content of foreign policy. Major elements of international order emphasized, but not explained, in recent criticisms of realism and institutional- ism include the difference between Anglo-American, Nazi, and Soviet plans for the post±World War II world; U.S. concern about a few North Korean, Iraqi, or Chinese nuclear weapons, rather than the greater arsenals held by Great Britain, Israel, and France; the substantial differences between the compromise of ``embedded liberal- ism'' underlying Bretton Woods and arrangements under the Gold Standard; diver- gences between economic cooperation under the EC and the Council for Mutual Economic Assistance; and the greater protectionism of the Organization for Eco- nomic Cooperation and Development's agricultural policy, as compared to its indus- trial trade policy. 81Liberal IR theory offers plausible, parsimonious hypotheses to explain each of these phenomena. 82 Second,liberal theory offers a plausible explanation for historical change in the international system.The static quality of both realist and institutionalist theoryÐ their lack of an explanation for fundamental long-term change in the nature of inter- national politicsÐis a recognized weakness. In particular, global economic develop- ment over the past ®ve hundred years has been closely related to greater per capita wealth, democratization, education systems that reinforce new collective identities, and greater incentives for transborder economic transactions. 83 Realist theory ac- cords these changes no theoretical importance. Theorists like Waltz, Gilpin, and Paul Kennedy limit realism to the analysis of unchanging patterns of state behavior or the cyclical rise and decline of great powers. Liberal theory, by contrast, forges a direct causal link between economic, political, and social change and state behavior in world politics. Hence, over the modern period the principles of international order have been decreasingly linked to dynastic legitimacy and increasingly tied to factors directly drawn from the three variants of liberal theory: national self-determination and social citizenship, the increasing complexity of economic integration, and liberal democratic governance. 84 Third,liberal theory offers a plausible explanation for the distinctiveness of mod- ern international politics.Among advanced industrial democracies, a stable form of interstate politics has emerged, grounded in reliable expectations of peaceful change, domestic rule of law, stable international institutions, and intensive societal interac- tion. This is the condition Deutsch terms a ``pluralistic security community'' and Keohane and Nye term ``complex interdependence.'' 85 Whereas realists (and constructivists) offer no general explanation for the emer- gence of this distinctive mode of international politics, liberal theory argues that the emergence of a large and expanding bloc of paci®c, interdependent, normatively satis®ed states has been a precondition for such politics. Consider, for example, the current state of Europe. Unlike realism, liberal theory explains the utter lack of com- 81. See Ruggie 1982; and Wendt 1994.
82. Moravcsik 1992, forthcoming.
83. Huntington 1991.
84. See Barkin and Cronin 1994; and Keohane and Nye, 1971.
85. See Deutsch 1957; and Keohane and Nye 1977, chap. 2. Liberal Theory of International Politics535 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris petitive alliance formation among the leading democratic powers today. For ex- ample, the absence of serious con¯ict among Western powers over YugoslaviaÐthe ``World War I scenario''Ðre¯ects in large part a shared perception that the geopoliti- cal stakes among democratic governments are low. Similarly, liberalism makes more sense of the sudden reversal of East±West relations, a shift made possible by the widespread view among Russian officials (so interview data reveal) that Germany is ethnically satis®ed, politically democratic, and commercially inclined. 86 The Conceptual Limits of Liberalism: Why Functional Regime Theory Is Not Liberal A second advantage of the reformulation is to clarify the fundamental divergence between theories of state preferences and modern theories of international regimes.
This divergence helps explain why liberals have failed to identify a coherent set of social scienti®c assumptions underlying existing ``liberal'' IR theory.
Those who choose to de®ne liberal theory in terms of its intellectual history natu- rally con¯ate the belief in institutions with a concern about the societal sources of state preferences. Liberalism as an ideology and partisan movement has often been associated in the popular mind with advocacy of international law and organization, despite the views of many leading liberals. 87Others link these two arguments ideo- logically: Both seem to suggest an optimistic, ameliorative trend in modern world politics. Whatever the reason, contemporary ``functional'' theories of international regimes are often referred to as forms of ``neoliberal institutionalism,'' though it is fair to note that Keohane, originator of ``functional regime theory,'' has abandoned the term. Daniel Deudney and G. John Ikenberry's attempted restatement of liberal- ism goes furthest, asserting ¯atly that ``the peace of the West does not derive simply or mainly from the fact that its polities are all democracies,'' but from international institutions. 88 Imre Lakatos reminds us, however, that the coherence of scienti®c theories is measured not by their conclusions, but by the consistency of their ``hard-core'' as- sumptions. By this standard, neoliberal institutionalist theory has relatively little in common with liberal theory as elaborated here, because most of the analytic assump- tions and basic causal variables employed by institutionalist theory are more realist than liberal. Like realism, institutionalism takes state preferences as ®xed or exog- enous, seeks to explain state policy as a function of variation in the geopolitical environmentÐalbeit for institutionalists information and institutions and for realists material capabilitiesÐand focuses on the ways in which anarchy leads to suboptimal outcomes.
86. Wallander 1993.
87. Nearly all treatments of liberal IR theory combine institutionalist and preference-based strains in this way; see Doyle 1997; Keohane 1990; Russett 1993; Matthews and Zacher 1995, 133±37; Risse- Kappen 1996, 365; and Deudney 1995, 191±228. Despite a serious misreading of Kant, the English school trichotomy, which distinguishes Grotius from Kant, is more consistent; for example, see Wight 1991.
88. Deudney and Ikenberry 1994. For a liberal critique, see Moravcsik 1996.
536International Organization @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant Liberalism, by contrast, shares none of these assumptions. It permits state prefer- ences to vary while holding power and information constant, explains policy as a function of the societal context, and focuses on how domestic con¯ict, not interna- tional anarchy, imposes suboptimal outcomes. Therefore, contemporary regime theory ought more properly to be termed ``modi®ed structural realism'' (as it was initially) or ``institutionalism'' (as some now prefer), rather than ``neoliberal institutional- ism.'' 89This division permits us to speak of a coherent set of social scienti®c assump- tions underlying both. Rather than treated as parts of the same theoretical tradition, the two theories should be tested against one another or carefully crafted into explic- itly multicausal explanationsÐoptions explored in more detail in the next two sec- tions.
This is not to imply, however, that liberal theory is of no utility in analyzing international regimes. To the contrary, it contributes to such analysis in at least two distinctive ways. First, liberal theory explains when and why the con®guration of state preferences assumed by institutionalistsÐa mixed-motive collective action prob- lem that can be overcome by the centralized manipulation of information through common rulesÐis likely to emerge. Since, moreover, particular institutional struc- tures solve speci®c collective action problems, the con®guration of preferences per- mits us to predict detailed characteristics of international regimes. 90 Second, liberal theory deepens the institutionalist account of regime stability.
Realists argue that regime stability and expansion are functions of enduring hege- monic power; institutionalists maintain that the high interstate transaction costs of regime creation or renegotiation explain regime stability, even if patterns of func- tional bene®ts would recommend renegotiation. Liberal theory suggests an alterna- tive hypothesis: namely that international regimes are stable when societal individu- als and groups adjust so as to make domestic policy reversal (or even stagnation) costlyÐas neofunctionalist regional integration theorists have long argued. This ac- count is consistent with the transaction cost foundations of institutionalist reasoning but grounded in societal ``lock in'' effects and the resulting stability of state prefer- ences, not the costs of interstate bargaining, monitoring, and sanctioning. Such ``so- cial embeddedness'' may take the form of ®xed investments by private ®rms, ideo- logical commitments by political parties concerned about their reputation, costly institutional adaptation by domestic bureaucracies, or government investment in mili- tary defense. 91 The liberal view of regimes as ``socially embedded'' can be extended to suggest endogenous causes of regime change over time. International regimes that induce greater societal demands for cooperation are more likely to deepen or expand over time, whereas those that do not are likely to be fragile. One example is the liberal account of international law, which suggests that international rules and norms are most effectively implemented as ``horizontal commitments'' enforced by national courts and parliaments, not ``vertical commitments'' enforced by supranational ac- 89. Keohane 1985, 1989.
90. Martin 1993.
91. On institutional adaptation, see Keohane 1991. Liberal Theory of International Politics537 @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant tors, and that such horizontal commitments can generate self-sustaining momentum over time by empowering particular domestic groups. 92 Methodological Implications of Liberal Theory:
The Danger of Omission A third potential advantage of reformulating a social scienti®c theory is to increase its salience, thus compelling empirical studies to give serious consideration to hypoth- eses drawn from it and discouraging omitted variable bias. 93Powerful liberal hypoth- eses exist to account for many major phenomena in world politics, yet surprisingly few studies directly confront realist and institutionalist (or constructivist) hypotheses with their liberal counterparts. Instead, empirical studies tend to treat realism (or occasionally institutionalism or ``rationalism'') as an exclusive baseline. The result is not just incomplete analysis. It is omitted variable bias that in¯ates the empirical support for new theoretical propositions due to the exclusion of (correlated) liberal ones. Two recent examplesÐone realist, one constructivistÐdemonstrate the consid- erable empirical signi®cance of this bias. 94 The ®rst example comes from perhaps the most prominent debate in recent realist theoryÐnamely, that surrounding Joseph Grieco's ``relative-gains'' critique of insti- tutionalism. Based on an analysis of the implementation of nontariff barrier (NTB) provisions negotiated in the Tokyo Round of GATT, Grieco seeks to demonstrate that security concerns about relative gains, not fears of future cheating, motivate noncooperation, even in foreign economic policy. 95Yet in focusing on institutional- ism, Grieco ignores liberal explanations for noncooperation based on domestic institutions, ideas, and distributional con¯ict among domestic economic interests. 96 Subsequent interventions in the relative-gains debate by formal theorists, which have done much to clarify the strategic conditions under which particular strategies are likely to emerge, exacerbate this neglect by seeking to make a virtue of omission.
Emerson Niou and Peter Ordeshook see preferences as ``tangential to a theory of international systems. . . . We can conduct this discussion without references to goals.'' 97As a result, the relative-gains debate has remained extraordinarily narrow.
Both Grieco and those he criticizes treat national interests as ®xed and seek only to determinewhichexternal political constraintÐcapabilities or informationÐconsti- tutes the primary determinant of state behavior.
This neglect of liberal hypotheses would be of only abstract signi®cance had it not led all participants in the relative-gains debate to overlook the explanation of non- cooperation that most analysts of international trade policy, not to mention nearly all who actually conduct negotiations of this kind, consider decisiveÐnamely, pressure 92. See Slaughter 1995; Burley and Mattli 1993; and Moravcsik 1995.
93. Tetlock and Belkin 1996, 34.
94. King, Keohane, and Verba 1994, 168±82.
95. See Grieco 1988, 1990; and Baldwin 1993.
96. Grieco concedes this; see Grieco 1990, 486±88 n.
97. See Niou and Ordeshook 1994; Powell 1994, 318; and Snidal 1991.
538International Organization @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant from particularistic domestic groups with intense distributional concerns. Liberal preference-based explanations dominate the specialized economic, political science, and policy literature on trade, particularly in precisely those three areas where Grieco ®nds ``relative gains'': government procurement, industrial standard-setting, and ad- ministrative protection. Yet Grieco codes these three critical cases of interstate bar- gaining failure as con®rming his account, without considering alternative motiva- tions nor, except in one minor case, providing any direct evidence of national security concerns. Studies in other areas that do test liberal theories against realist alternatives reveal that pressure from economic special interests tends to dominate security con- cerns, even in ``least likely'' cases like military procurement. 98Since there is good reason to suspect omitted variable bias, our theoretical understanding of relative gains seeking would have been far more reliable (but also surely far less realist!) if the initial research design had included liberal hypotheses.
A second example of omitted variable bias is drawn from recent efforts to develop a constructivist approach to IR. Constructivism, though not yet formulated as a theory, is a welcome effort to broaden IR debates by focusing on ideational socialization.
Yet, like realist claims about relative gains, constructivist arguments are generally employed so as to prevent confrontation with preexisting liberal theory. The theoreti- cal introduction to a recent collection of constructivist essays,The Culture of Na- tional Security,for example, identi®es ``two major analytical perspectives on IR'':
Waltzian neorealism and the ``neoliberal'' regime theory of Keohane and Robert Axelrod. With only a few exceptions, recent constructivist work employs this di- chotomy, therefore neglecting liberal theories focusing on the relationship between con¯ict and democratic government, economic interdependence, and domestic coali- tionsÐtheories recognized as among the most powerful in contemporary security studies. 99 This is unfortunate. There are good a priori reasons to suspect that omitted variable bias is in¯ating the empirical support for any constructivist claim that remains un- tested against a liberal hypothesis. Not only do both liberal and constructivist argu- ments focus on variation in state preferences, but we know that the receptiveness to particular ideas is closely correlated with authoritative domestic institutions, patterns of interdependence, and existing patterns of cultural identity. ``Systemic'' construc- tivist claimsÐthe view that national ideas and identities result from the socializing ``feedback'' effects of previous international political interactionsÐare particularly vulnerable to such bias, because domestic preferences are the critical causal link between systemic socialization and state policy. Without a theory of domestic prefer- ence formation, how can a constructivist specify which feedback processes of social- ization matter, let alone when and how they matter? Sociologists have long since concluded that ``new institutionalist'' analyses of this kind are crippled unless con- 98. Moravcsik 1993.
99. Typical of the literature are Katzenstein 1996, 3, 12±13, 25, 37; and Wendt 1996. Finnemore is a welcome exception, whereas Risse-Kappen and Legro attempt syntheses; see Finnemore 1996; Risse- Kappen 1996; and Legro 1996. Liberal Theory of International Politics539 @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant joined with a reliable theory of actors and agency. 100 In short, in order to theorize rigorously about systemic social construction, we®rstrequire a liberal theory.
Existing liberal hypotheses, moreover, offer a general account of variation in socializationÐa theory of when the transnational transmission of ideas mattersÐ something for which ``systemic'' constructivists as of yet lack an explanation. Social- ization effects, liberals predict, will re¯ect the extent of convergence or divergence among preexisting domestic institutions and ideas. For example, socialization toward con- vergent norms stems from convergent domestic institutions and ideas. Liberal institutions and norms may be particularly conducive to the promotion of peace and cooperation, but the argument implies that the convergence of certain other sorts ofnonliberalvalues, such as monarchy in the Concert of Europe or ``Asian values'' in ASEAN, may also have signi®- cant, if generally less striking, effects on world politics.
Consider, for example, the current revival of interest among constructivists in Deutsch's analysis of how transnational communication creates ``pluralistic security communities'' (PSGs) in which groups of states ``cease to contemplate'' military con¯ict. PSGs are said to demonstrate the importance of the socializing power of transnational ideas, the importance of ``common . . . we-feeling'' rather than ``conver- gent'' interests. 101 Yet Deutsch himself viewed liberal factorsÐan autonomous civil society with individual mobility, the rule of law, and competitive politicsÐas precon- ditions for transformative effects of high levels of international transactions and communi- cation. Is it just coincidence that of the of the twelve successful post-1750 PSGs identi®ed by Deutsch, ten or eleven were composed of liberal or nearly liberal states? 102 This analysis poses two general challenges to constructivism. First, it suggests that liberal variables are more fundamental than constructivist ones, because they de®ne the conditions under which high rates of communication and transaction alter state behavior. Second, it raises the possibility that domestic liberal factors may explain bothpeace and transactions, rendering the correlation between international commu- nication and peace not just secondary, but spurious. 103 Without directly confronting liberal theory, we cannot dismiss either possibility. Surely our understanding of world politics would be better served by more rigorous empirical confrontation between constructivism and liberalism. Better yet would be a sophisticated synthesis, as found in the ``liberal constructivist'' research program advocated by Thomas Risse- Kappen. This approachÐa ``constructivist interpretation of liberal theory''Ðbacks away from the notion that values result from interstate socialization and argues in- stead in a liberal vein that ideas and communication matter when they are most congruent with existing domestic values and institutions.
104 These examples demonstrate why it is essential to treat liberalism as a constant theoretical baseline against which either realist or constructivist hypotheses are 100. DiMaggio 1988, 10ff.
101. Adler and Barnett, forthcoming.
102. Deutsch 1957, 29±30, 36, 66±69, 123±24.
103. Oneal et al. 1996, 13.
104. For example, see Risse-Kappen 1996, 365; Legro 1996; Johnston 1995; Burley and Mattli 1993; Moravcsik 1995; and Sikkink 1993.
540International Organization @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant testedÐthat is, as a fundamental paradigmatic alternative in IR. Failure to control for underlying variation in state preferences has confounded recent attempts, quantita- tive and qualitative, to test monocausal realist theory in many other areas. These include the study of deterrence, hegemonic in¯uence, alliance formation, interna- tional negotiation, international monetary cooperation, multilateral cooperation, eco- nomic sanctions, and European integration. 105 Similar criticisms could be directed at functional regime theory; baseline predictions about the precise form and the subse- quent consequences of international regimes could be derived from liberal theory. 106 Failure to do so poses a clear threat to valid empirical inference.
We already see realists and constructivists ``borrowing'' liberal hypotheses, even where it undermines the ``hard core'' of theories. Realist Stephen Walt suggests that ``intentions'' should be included alongside power, proximity, and offense dominance in their speci®cation of ``threat.'' Constructivist Alexander Wendt is in retreat from his ``holistic'' or ``top-down'' claim that state identities are ideationally constructed by interaction of states (not societies) within the international system. Now he ac- cepts a view heavily dependent on ``unit-level changes in the structure of state- society relations,'' embedded in domestic (as well as international) institutions, which leads him to embrace phenomena for which well-established liberal theories have long provided widely accepted explanations, for example, the democratic peace, U.S.
fear of nuclear weapons in the hands of rogue states but not democratic allies, and the ``distinctiveness of the West.'' 107 The prognosis: Unbiased tests would very likely supplant numerous accepted realist, institutionalist, and constructivist explanations of state behavior with liberal accounts.
In the long run, comparative theory testing should be aimed at a clearer de®nition of the empirical domain within which each major theory performs best. Detailed predictions concerning these empirical domains go beyond the scope of this essay, since they require issue-speci®c analysis of at least three theories. We can nonethe- less conclude that oft-cited generalizations about the scope of realism and liberalism need to be revised fundamentally. Liberal theory remains important, even primary, even in what are currently considered ``least likely'' cases, for example, where there exist direct threats to national security, high levels of interstate con¯ict, and large numbers of nonliberal states. The restatement proposed here aims to facilitate empirical research that would move us beyond these simplistic assertions about the limited explanatory domain of liberal theory.
Liberalism and Theory Synthesis: The Priority of Preferences The previous section demonstrates that, as a monocausal theory, liberalism offers a theoretically coherent and empirically promising alternative to realism and institu- 105. See Fearon, forthcoming; Walt 1987, 21±28; Baldwin 1985; and Moravcsik, forthcoming. An instructive example is Martin, who ®nds liberal and institutionalist factors to be so closely correlated that quantitative analysis cannot distinguish themÐa result consistent with the existence of potential for sig- ni®cant omitted variable bias; see Martin 1992.
106. Martin 1993.
107. See Walt1987; Elman 1996, 33; Wendt 1996, 1±4, 6, 11, 28±30, 33±40, 109ff, 328±33, 344ff, 400ff. Liberal Theory of International Politics541 @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris tionalism, as well as to constructivism. Yet it is not always appropriate to employ a monocausal theory. If foreign policymaking is a process of constrained choice by purposive states, a view shared by realist, institutionalist, and liberal theory, there may well be cases in which acombinationof preferences and constraints shapes state behavior. In such cases, a multicausal synthesis, one that treats these theories not as substitutes but as complements, is required. If so, what synthetic model should prop- erly be employed? Fundamental theories should be formulated so as to provide rigor- ous means of de®ning their proper relationship to other theories.
A fourth important advantage of this theoretical restatement is that it offers a clearer and more internally consistent model for multicausal theory synthesis in IR than currently exists. It does so, moreover, by reversing the nearly universal presumption among IR theorists that ``liberalism makes sense as an explanatory theory within the constraints pointed out by . . . Realism.'' 108 Waltz, Keohane, and many others recom- mend that we synthesize theories by employing realism ®rst (with preferences as- sumed to be invariant) and then introducing competing theories of domestic politics, state-society relations, and preference change as needed to explain residual variance. 109 Yet this conventional procedure lacks any coherent methodological or theoretical justi®cation. Methodologically, the procedure overtly introduces omitted variable bias by arbitrarily privileging realist explanations of any phenomena that might be explained by both realist and liberal theories, without ever testing the latter explana- tion. Theoretically, the procedure is grounded in an incoherent underlying model.
The assumption of state rationality, central to realism, institutionalism, and most variants of liberalism, ought to imply precisely the opposite: Once we accept that both preferences and constraints are causally important,liberal theory enjoys analyti- cal priority in any synthesis.
To see why this is so and what it implies, one need only note that the assumption of rationality or purposive behavior central to realism (like the ``bounded rationality'' claims of institutionalism) implies action on the basis of a prior, speci®c, and consis- tent set of preferences. Unless we know what these preferences are (that is, unless we know the extent to which states value the underlying stakes), we cannot assess realist or institutionalist claims linking variation in the particular means available to states (whether coercive capabilities or institutions) on interstate con¯ict or cooperation.
Preferences determine the nature and intensity of the game that states are playing and thus are a primary determinant of which systemic theory is appropriate and how it should be speci®ed. Variation in state preferences often in¯uences the way in which states make calculations about their strategic environment, whereas the converseÐ that the strategic situation leads to variation in state preferencesÐis inconsistent with the rationality assumption shared by all three theories. 110 In short, liberal theory 108. See Keohane 1990, 192; and Matthew and Zacher 1996, 46.
109. See Waltz 1989, 1996, 57. There is ``something particularly satisfying about systemic explana- tions and about the structural forms of [systemic and structural] explanations''; see Keohane 1986, 193.
110. To be sure, as some constructivists and neofunctionalists argue, a reverse effect might occur by feedback over time from previous decisions, but such a dynamic process still presupposes an underlying liberal theory of state action.
542International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris explains when and why the assumptions about state preferences underlying realism or institutionalism hold, whereas the reverse is not the case.In situations where these assumptions do not hold, realism and institutionalism (as well as some variants of constructivism) are not just of limited importance, they are theoretically inappropri- ate and thus empirically irrelevant.
It follows that in any multicausal synthesis with realist and institutionalist theoryÐ that is, any analysis that remains open to the possibility that variation in state prefer- ences, as well as power and institutions, might in¯uence state policyÐliberal theory enjoys causal priority. Steven Krasner's well-known metaphor captures this insight:
If institutionalism determines whether governments reach the Pareto-frontier, and realism determines which point on the Pareto-frontier governments select, liberalism de®nes the shape of the Pareto-frontier itself. 111 Surely the latter task is primary. This conclusion should hardly be surprising to political scientists, for it is the unambigu- ous lesson of the classic literature on the methodology of studying power and in¯u- ence, whether in local communities or global politics. Robert Dahl's analysis of power teaches us that we cannot ascertain whether ``A in¯uenced B to do something'' (that is, in¯uence) unless we know ``what B would otherwise do'' (that is, prefer- ences). 112 The implication for realism is clear: Not only do we need to know what state preferences are, but unless they are arrayed so that substantial interstate con¯ict of interest exists and the deployment of capabilities to achieve a marginal gain is acceptable, realist theory is powerless to explain state behavior. Similarly, institution- alist explanations of suboptimal cooperation are appropriate only under circum- stances in which states have an interest in resolving particular interstate collective action problems. Kenneth Oye draws the implication: ``When you observe con¯ict, think DeadlockÐthe absence of mutual interestÐbefore puzzling over why a mutual interest was not realized.'' 113 The analytical priority of liberalism is not simply an abstract requirement of theo- retical consistency; it is empirically signi®cant. 114 Realists and institutionalists alike are retreating to what Keohane terms a ``fall-back position,'' whereby exogenous variation in the con®guration of state interests de®nes the range of possible out- comes,within whichcapabilities and institutions explain outcomes. 115 This implicitly concedes not just the need for multicausal synthesis, but the analytical priority of liberal theory.
The popularity of the ``fallback'' position also defuses a practical objection often raised against ``societal'' or ``domestic'' theories, namely that research into domestic preferences is overly demanding, if not impossible. To be sure, the investigation of national motivations poses particular challenges. State preferences must be clearly distinguished from strategies and tactics and then must be inferred either by observ- 111. Krasner 1993.
112. See Dahl 1969; Coleman 1990, 132±35; and Baldwin 1989, 4.
113. See Oye 1986, 6; and Morrow 1994.
114. This is not to prejudge whether liberal explanations provide greater or lesser explanatory power, which is an empirical question.
115. Keohane 1986, 183. Liberal Theory of International Politics543 @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant ing consistent patterns of state behavior or by systematically analyzing stable ele- ments internal to states, as revealed in decision-making documents, trustworthy oral histories and memoirs, patterns of coalitional support, and the structure of domestic institutions. 116 Yet the existence of such difficulties does not constitute a valid reason to neglect liberal theory. No respectable philosophy of science recognizes the diffi- culty of performing relevant empirical research with current techniques as a legiti- mate reason to abandon a promising scienti®c paradigm. Instead, scienti®c technique and training should adjustÐan argument for thorough training in languages and pri- mary-source analysis, as well as in rigorous theories of comparative politics. More- over, the popularity of the fall-back position demonstrates that the difficulty of ascer- taining preferences is not unique to liberalism. We have seen that even monocausal empirical tests of realist and institutionalist theories must control reliably for varia- tion in underlying preferences (not just strategies) of states.This requires precisely the same detailed research into domestic politics.Such a baseline control is, more- over, most reliable where backed by an explicit and generalizable theory of domestic preference formation, that is, a liberal theory. In short, research into domestic prefer- ence formation is unavoidable.
The priority of liberalism in multicausal models of state behavior implies, further- more, that collective state behavior should be analyzed as atwo-stage processof constrained social choice. States ®rst de®ne preferencesÐa stage explained by lib- eral theories of state-society relations. Then they debate, bargain, or ®ght to particu- lar agreementsÐa second stage explained by realist and institutionalist (as well as liberal) theories of strategic interaction. 117 The two-stage model offers a general struc- ture for research design and theoretical explanation. In those cases where liberal factors only in¯uence strategic outcomes directly, through preferences and prefer- ence intensities (ain Figure 1), liberalism can be tested as a monocausal hypothesis against alternative realist or institutionalist factors (cin Figure 1). Liberal factors may also in¯uence outcomes indirectly, because the nature of preferences helps de- termine (bin Figure 1) the nature and strength of the causal relationship between strategic circumstances and actions (cin Figure 1). Recall that preferences do not simply shape outcomes, they tell us which realist or institutionalist factors are impor- tant and how they relate to state behavior. In such cases, explaining (or at least controlling for) variation in state preferences is analytically prior to an analysis of strategic interaction. Without a prior analysis of preferences, only monocausal formu- lations of realist or institutionalist theory can be tested. 118 The primacy of liberal theory in such multicausal explanations may appear to be an abstract admonition, yet precisely this two-stage approach has characterized lib- eral theory and practice from Kant's philosophy to the practical calculations by the American architects of the post±World War II settlement. Throughout, multicausal or 116. On the methodological advantages of analyzing ``corporate'' rather than ``personal'' actors, see Coleman 1990, 513, 933ff.
117. See Morrow 1988; Ruggie 1982; and Legro 1996.
118. Watson and McGaw 1970, chap. 15.
544International Organization @xyserv1/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 kris two-stage liberalism makes sense of what have long been considered contradictions and ambiguities in classic liberal thought and modern liberal statecraft.
Consider Wilson's proposal for the League of Nations, often cited as the epitome of liberal ``legalism'' and ``utopianism.'' At ®rst glance, Wilson's proposal seems to re¯ect a naive con®dence in international institutions. Understood as an implicit social science theory, not ideology, we see that it was neither utopian nor fundamen- tally institutionalist. It rested instead on a pragmatic two-stage liberal view, andits failure actually con®rms liberal predictions.
From the start, Wilson was skeptical about theautonomousin¯uence of interna- tional institutions. He cared little about their precise form, because he viewed them as no more than ``a symbolic affirmation of the `rightness' of democracies in their mutual relations.'' 119 Thus, for example, his initial draft of the Covenant included no provisions for international law or a supranational court; both were eventually added only at the insistence of more conservative (and more cynical) foreign and domestic politicians. Instead what he termed the ``®rst point'' to remember about the League was not institutionalist but liberal: Its membership was to be restricted to those coun- tries enjoying republican government and national self-determination. Insofar as the League was to rely on public opinion, it was to be solelydemocraticpublic opinion.
Based on a multicausal liberal analysis, Wilson explicitly identi®ed a set of narrow preconditions under which collective security institutions could succeed. The League, he argued, would function only if nationally self-determining democracy was a nearly universal form of government among great powers, which in turn controlled an over- whelming proportion of global military power. In 1917, Wilson believed this situa- tion to be imminent: ``There are not going to be many other kinds of nations for 119. Holsti 1991, 187. FIGURE 1. A two-stage model of state behaviorLiberal Theory of International Politics545 @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant long. . . . The Hapsburgs and the Hohenzollerns are permanently out of business.'' 120 Given Wilson's underlying theory, is it surprising that the League had become mori- bund by 1936, after twelve European countries had moved from democracy to dicta- torship? Or that this shift isolated democratic France and Britain, exacerbating their oft-noted geopolitical dilemmas in Manchuria and Abyssinia? Here we again see the virtue of de®ning liberal theory in a nonideological manner: The failure of the League, often cited as a realist refutation of liberalideology,in fact con®rms liberal IRtheory.
Multicausal liberalism helps to explain not only ambitious schemes for cooperation like collective security, but ``realist'' policy outcomes like power balancing and bipolar con¯ict.
Kant, for example, recognized the balance of power as an unstable, second-best mechanism suitable only to a particular set of circumstances de®ned by liberal theory, namely relations among nonrepublican states. In theoretical terms, realism was embedded in a deeper and more encompassing transhistorical liberal theory of social development. The balance of power serves to limit the ``vigorous . . . rivalry'' among states, permitting the progressive emergence of republican government and commerce (as well as, though clearly secondary, international rules), which would in turn steadily diminish the relevance of interstate balanc- ing. Like Wilson, Kant remained skeptical of strong international institutions, focusing instead on the development of societal preferences. 121 A form of multicausal liberalism very similar to that espoused by Kant underlay the post±World War II U.S. policy of containmentÐa policy traditionally treated as the embodiment of realism. Containment was never simply power balancing. It was an integrated multicausal liberal grand strategy, as made explicit after World War I by Wilson and John Dewey, then after World War II by George Kennan. Kennan, in this regard a liberal, linked the European threat to the nature of the Soviet regime; it is often forgotten that nine-tenths of the seminal ``X'' article was given over to an analysis of Soviet domestic beliefs. 122 A Western military deterrent would be re- quired, he argued, only until the Bolshevik revolution had run its course, whereupon the Soviet system would collapse of its own accord. Thus the decisive Western ac- tions in the Cold War, according to Kennan, were the reconstruction of Germany and Japan as capitalist democracies through policies like the Marshall Plan. The goal of the policy was the transformation of social purposes and state preferences in Western countries, neither of which would assume much importance in a purely realist analy- sis. This multicausal liberal interpretation of containment banishes various ambigu- ities and tensions in Kennan's thought that have bedeviled biographersÐnot least his singular synthesis of balance-of-power thinking and strident antimilitarism. 123 The conduct and conclusion of the Cold War proceeded precisely as Kennan's two-stage liberal model had predicted. Realist power balancing served throughout as 120. See Wilson in Foley 1923, 64±65, see also 58±59, 64±65, 74±87, 147, 198±99; Kuehl 1969, 340±44; Foley 1923, 129; and Wolfers and Martin 1956, 178.
121. Kant 1991, 49, 92, 112±14.
122. See Kennan 1947; and Gellman 1984, 37, 83±105, 130±38.
123. ``To nearly everyone with an opinion on the subject, it seems plain that there have been two George Kennans. . . . Kennan the Cold Warrior [and] Kennan the peacemonger, the dovish historian''; see Gellman 1984, xiii.
546International Organization @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant a static, interim instrument to maintain the status quo, but shifting state preferences explain the outbreak and eventual passing of the con¯ict. By 1959, standing in a Moscow exhibit of kitchenware, Richard Nixon and Nikita Khrushchev declared that the Cold War would be won and lost not through relative military capabilities, but through the relative economic prowess and ideological attractiveness of the two superpowers. Economic stagnation and a measure of ideological change in the East predated foreign policy change. If the West, as Khrushchev rashly promised, had been buried under the superior economic performance of the East, the outcome might well have been different. 124 These examples demonstrate the ability of multicausal liberal theory to explain critical twentieth-century foreign policy decisions, such as those taken in 1918, 1947, and 1989, even when national security interests are fully engaged. 125 In interpreting such cases, the major difference between realists and liberals lies not, as is often claimed, in the observation that states are concerned about security threats and bal- ancing; this ®nding is consistent with a multicausal liberal explanation. Where the two theories genuinely differ is on the sources of security threats themselves, with realists attributing them to particular con®gurations of power, institutionalists attrib- uting them to uncertainty, and liberals attributing them to ideological, institutional, and material con¯ict among state preferences. If liberal theory contributes to explain- ing core realist cases such as bipolar con¯ict, there is good reason to believe that the most powerful in¯uences in world politics today are not the deployment of military force or the construction of international institutions, but the transformation of domes- tic and transnational social values, interests, and institutions. Conclusion: The Virtues of Theoretical Pluralism Liberal IR theory is not simply an ideological foil for more realistic and rigorous theories, as its critics claim, nor an eclectic collection of hypotheses linked only by common intellectual history and normative commitment, as its proponents are cur- rently forced to concede. It is instead a logically coherent, theoretically distinct, empirically generalizable social scienti®c theoryÐone that follows from explicit as- sumptions and generates a rich range of related propositions about world politics that reach far beyond cases of cooperation among a minority of liberal states. By reformu- lating liberalism as theory rather than ideology, we have repeatedly seen that what are often treated as liberal failures become liberal predictions.
Moreover, liberalism exhibits considerable potential for theoretical extension. Aside from the myriad opportunities for empirical testing and theoretical re®nement of speci®c hypotheses, a number of broader areas are poised for theoretical innovation.
Relaxing the assumption of unitary state behavior would support a range of ``two- 124. Jervis 1996.
125. King, Keohane, and Verba 1994, 209±12. Liberal Theory of International Politics547 @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant level'' hypotheses about the differential ability of various domestic state and societal actors to pursue semiautonomous transnational activities. Relaxing the assumption that decision making is static would support analyses of change over time. Greater attention to feedback from prior decisions mediated by intervening liberal factors like domestic ideas, institutions, and interests might provide ®rmer microfoundations for theories of regime stability and changeÐan area of potential collaboration with constructivists and historical institutionalists. Finally, the rich interaction among do- mestic and transnational ideas, interests, and institutions is only beginning to be explored.
A ®nal word to those readers who object to using the termliberalto distinguish this restatement. Such potential critics fall into two groups. One group is likely to ®nd this formulation of liberal theory too narrow, the other too broad.
The ®rst group of critics will protest that this restatement fails to acknowledge the full richness of the intellectual history and, in particular, the normative implications of liberalism. This criticism is correct, but the omission is deliberate. This article does not aim to provide a comprehensive intellectual history of classical liberal inter- national thought, nor a self-sufficient guide to the normative evaluation of policy, but to distill a coherent core of social scienti®c assumptions for the narrower purpose of explaining international politics. 126 The project is best judged on its own termsÐthe four criteria outlined in the preceding sectionÐnot its ®delity to prior usage.
The second group of critics will complain that liberalism has too many de®nitions as it stands, most too vague to be useful. Some reject altogether the use of ``isms'' to designate foundational theoretical positions in IR. This criticism is semantic rather than substantive. In contrast to other fundamental divisionsÐfor example, those be- tween domestic and systemic ``levels of analysis,'' optimistic and pessimistic prog- noses, or realist, liberal, and Marxist ideologiesÐthe tripartite division among real- ism, liberalism, and institutionalism is fully consistent with the foundation of rationalist social theory, which divides the determinants of social behavior into three categories:
interests, resources, and institutions or information. 127 Those who view state behav- ior as the result of a process of constrained choice would do well to champion rather than criticize efforts to impose greater theoretical coherence and consistency on theo- ries of rational state behavior.
Either type of critic may nonetheless prefer to call liberal theory a ``societal,'' ``state-society,'' ``social purpose,'' or ``preference-based'' theory. The central claims of this article, however, remain intact. First, major IR theories should be divided into those that stress the pattern of state preferences, the distribution of resources, and the institutional provision of information. Second, greater priority should be given to the further development of the ®rst category. This development need not proceed ad hoc, but can be achieved by grounding such efforts in the common assumptions and causal processes proposed here. Only further research can reveal their full empirical power; yet existing studiesÐfrom explanations of the democratic peace to endogenous tariff 126. Nonetheless, the empirical claims advanced here have normative implications; see Doyle 1997.
127. Coleman 1990.
548International Organization @xyserv3/disk3/CLS_jrnl/GRP_inor/JOB_inor619/DIV_619z01 jant theory to theories relating domestic institutions and ideas to foreign policyÐsuggest considerable promise. Third, a liberal theory of state preferences is the most funda- mental type of IR theory. Hypotheses that endogenize changes in state preferences deserve equal treatment in monocausal explanations and analytical priority in multi- causal ones, because liberal theory de®nes the theoretical and empirical domains in which it is appropriate even to consider realist and institutionalist claims. Thus those who ignore liberal theory do not simply sacri®ce comprehensiveness; they under- mine valid empirical evaluation of their own theories. Only by building on these three conclusions can liberals and their critics supplant debates over labels with debates over data.
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