It is often said that morality cannot be legislated; yet changes in civil rights laws and policies have been accompanied...

It is often said that morality cannot be legislated; yet changes in civil rights laws and policies have been accompanied by changes in attitudes. Since the passage of civil rights laws, the number of white Americans who support integrated schools has steadily risen, while the number of white Americans who describe their neighborhoods, friends, and co-workers as "all white" has steadily decreased. How does theory help explain this?