Anti-imperialism in political science and international relations is a term used in a variety of contexts, usually by nationalist movements, who want to secede from a larger polity (usually in the form of an empire, but also in a multi-ethnic sovereign state) or as a specific theory opposed to capitalism in Marxist–Leninist discourse, derived from Vladimir Lenin's work Imperialism, the Highest Stage of Capitalism. A less common usage is by isolationists who oppose an interventionist foreign policy.