Some historians believe that the Civil War was caused by a failure of the American political system, during the fifty years before the war, to solve

Some historians believe that the Civil War was caused by a failure of the American political system, during the fifty years before the war, to solve problems arising from states' rights and the expansion of slavery into the west. Other historians believe that the causes of the Civil War reside in a basic failure of the constitution to provide a framework for solving these problems. Evaluate the strength of both interpretations and explain which interpretation is more valid.