Pierre-Joseph Proudhon is considered the father of anarchism due to his writings and activism in the mid-19th century.

Mutual aid is the idea that individuals and groups can cooperate and support each other without the need for coercion or hierarchy.

Pierre-Joseph Proudhon emphasized the importance of voluntary associations and decentralized decision-making in his anarchist philosophy.

The Jura Federation was an anarchist commune established by Mikhail Bakunin in Switzerland in 1871.

Peter Kropotkin argued that mutual aid is a natural instinct among humans and other animals in his book Mutual Aid: A Factor of Evolution.

Mother Earth was an anarchist journal founded by Emma Goldman in 1906.

Mikhail Bakunin argued that the state is inherently oppressive and should be abolished in his book Statism and Anarchy.

The Spanish Civil War was an anarchist uprising in Spain that lasted from 1936 to 1939.

Pierre-Joseph Proudhon argued that anarchism is compatible with a free market economy in his book What Is Property?.

The Anarchist Federation was an anarchist organization founded by Errico Malatesta in 1891.

Peter Kropotkin argued that anarchism is a form of socialism in his book The Conquest of Bread.

The Ukrainian Civil War was an anarchist uprising in Ukraine that lasted from 1918 to 1921.

Max Stirner argued that anarchism is a form of individualism in his book The Ego and Its Own.

The National Confederation of Labor was an anarchist organization founded by Buenaventura Durruti in 1936.

Voltairine de Cleyre argued that anarchism is a form of feminism in her book The Anarchist Revolution.