This groundbreaking book challenges the dominant view of ideology held by both political scientists and political commentators. Rather than viewing ideological constructs like liberalism and conservatism as static concepts with fixed and enduring content, Professor Verlan Lewis explains how the very meanings of liberalism and conservatism frequently change along with the ideologies of the two major parties in American politics. Testing a new theory to help explain why party ideologies evolve the way that they do, this book traces the history of American political parties from the Hamiltonian Federalists and Jeffersonian Republicans of the 1790s to the liberal Democrats and conservative Republicans of today. Ideas of Power shows us how changing party control of government institutions, such as Congress, the presidency, and the Supreme Court, influences how party ideologies develop.