American constitutional theory has been cyclical, understanding the Constitution sometimes as a product of will and sometimes as a product of reason. Neither reason nor will ever completely disappears, but an age can usefully be characterized by either its majoritarian, consensual cast or its rationalist, scientific outlook. Chief Justice Marshall\u27s Court, for example, was committed to the idea of reason in politics: To Marshall, the Constitution was the product of political science. This faith in a convergence of constitutional order and a science of politics disappeared in the ante-bellum period. It was replaced by the belief that the Constitution rests on will alone. The purpose of constitutional interpretation, on this view, was to d...