An empire of liberty: the framework of American foreign policy -- America's imperial moment -- Theodore Roosevelt and the heel of Achilles -- Woodrow Wilson and the way to liberty -- Woodrow Wilson and the conscience of the world -- Franklin Roosevelt and the four freedoms -- Cold War liberalism from Truman to Reagan -- Bush, Clinton, and the triumph of Wilsonianism -- George W. Bush sees evil -- George W. Bush and the illusion of omnipotence