American conservatives generally consider individual liberty—within the bounds of conservative values—as the fundamental trait of democracy.[30][31] They typically believe in a balance between federal government and states' rights. Apart from some right-libertarians, American conservatives tend to favor strong action in areas they believe to be within government's legitimate jurisdiction, particularly national defense and law enforcement. Social conservatives—many of them religious—often oppose abortion, civil unions, and same-sex marriage. They often favor Christian prayer in public schools and government funding for private Christian schools.

Like most political ideologies in the United States, conservatism originates from republicanism, which rejects aristocratic and monarchical government and upholds the principles of the 1776 U.S. Declaration of Independence ("that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the Pursuit of Happiness") and of the U.S. Constitution, which established a federal republic under the rule of law. Conservative philosophy also derives in part from the classical liberal tradition of the 18th and 19th centuries, which advocated laissez-faire economics (i.e. economic freedom and deregulation)