This introduction sets the stage for the most creative period of constitutionalism in American history. During the five or six decades between the early 1760s and the early nineteenth century, Americans debated and explored all aspects of politics and constitution-making—the nature of power and liberty, the differing ideas of representation, the importance of rights, the division of authority between different spheres of government or federalism, the doctrine of sovereignty, the limits of judicial authority, and the significance of written constitutions. Rarely has any nation in such a short period of time discussed and debated so many issues of constitutionalism and created so many institutions of government, institutions that have lasted for over two hundred years.