Social anarchism, also known as left-wing anarchism or socialist anarchism, is the branch of anarchism that sees liberty and social equality as interrelated. It advocates for a social revolution to remove oppressive forms of hierarchy, such as capitalism and the state. In their place, social anarchists encourage social collaboration through mutual aid and envision non-hierarchical forms of social organization, such as voluntary associations. Identified with the socialist tradition of Pierre-Joseph Proudhon, Mikhail Bakunin and Peter Kropotkin, social anarchism is often contrasted with individualist anarchism, due to the latter's criticism of socialism. Source: Wikipedia (en)