Collectivist anarchism believes in collective ownership and management of production and property resources. Mutualism, as envisioned by Proudhon, combines individual ownership with collective use of resources through free contracts between producers. Anarcho-syndicalism advocates for revolutionary unionism to overthrow capitalism and the state through general strikes and worker self-management, while anarcho-communism promotes completely free access to goods and voluntary communal organization based on principles of mutual aid.