Conservatism is a major political ideology in the United States. American conservatism is different from European conservatism, and it has its roots in American Republicanism and classical liberalism. In contemporary American politics, it is usually associated with the Republican Party. Characteristics of conservative principles include limited government, respect for American traditions, support for Judeo-Christian values, moral universalism, individualism and defense against perceived threats posed by communism and socialism. Economically, U.S. conservatives support fiscal conservatism, economic liberalism, "laissez faire" capitalism, and opposition to government intervention in economy. In foreign policy, American conservatives usually advocate a strong national defense. They support the doctrine of "American exceptionalism", a belief that the U.S. is unique among nations and that its standing and actions do and should guide the course of world history.