Conservatism in the United States is a broad system of political beliefs in the United States that is characterized by respect for American traditions, republicanism, support for Christian values, moral universalism, pro-business and anti-labor union, anti-communism, individualism, advocacy of American exceptionalism, and a defense of Western culture from the perceived threats posed by socialism, authoritarianism, and moral relativism. Liberty is a core value, as it is with all major American parties. American conservatives consider individual liberty—within the bounds of American values—as the fundamental trait of democracy; this perspective contrasts with that of modern American liberals, who generally place a greater value on equality and social justice and emphasize the need for state intervention to achieve these goals. American conservatives believe in limiting government in size and scope, and in a balance between national government and states' rights. Apart from some libertarians, they tend to favor strong action in areas they believe to be within government's legitimate jurisdiction, particularly national defense and law enforcement. Social conservatives oppose abortion and same-sex marriage, while privileging traditional marriage and supporting Christian prayer in public schools.