The nature of capitalism is criticized by anarchists, who reject hierarchy and advocate stateless societies based on non-hierarchical voluntary associations. Anarchism is generally defined as the libertarian philosophy which holds the state to be undesirable, unnecessary and harmful as well as opposing authoritarianism, illegitimate authority and hierarchical organization in the conduct of human relations. Capitalism is generally considered by scholars to be an economic system that includes private ownership of the means of production, creation of goods or services for profit or income, the accumulation of capital, competitive markets, voluntary exchange and wage labor which has generally been opposed by anarchists historically. Since capitalism is variously defined by sources and there is