Neoconservatism is a political philosophy that emerge in the United States from the rejection of the social liberalism, moral relativism, and New Left counterculture of the 1960s. It influenced the presidential administrations of Ronald Reagan and George W. Bush, representing a realignment in American politics, and the defection of some liberals to the right side of the political spectrum; hence the term, which refers to being 'new' conservatives. Neoconservatism emphasizes foreign policy as the paramount responsibility of government, maintaining that America's role as the world's sole superpower is indispensable to establishing and maintaining global order.