Free-market anarchism, or market anarchism, also known as free-market anti-capitalism and free-market socialism, is the branch of anarchism that advocates a free-market economic system based on voluntary interactions without the involvement of the state. A form of individualist anarchism, left-libertarianism libertarian socialism and market socialism, it is based on the economic theories of mutualism and individualist anarchism in the United States. Left-wing market anarchism is a modern branch of free-market anarchism that is based on a revival of such free-market anarchist theories. It is associated with left-libertarians such as Kevin Carson and Gary Chartier, who consider themselves anti-capitalists and socialists.