The Conquest of Bread also known colloquially as The Bread Book, is an 1892 book by the Russian anarcho-communist Peter Kropotkin. Originally written in French, it first appeared as a series of articles in the anarchist journal Le Révolté. It was first published in Paris with a preface by Élisée Reclus, who also suggested the title. Between 1892 and 1894, it was serialized in part in the London journal Freedom, of which Kropotkin was a co-founder.

In the work, Kropotkin points out what he considers to be the defects of the economic systems of feudalism and capitalism and why he believes they thrive on and maintain poverty and scarcity. He goes on to propose a more decentralized economic system based on mutual aid and voluntary cooperation, asserting that the tendencies for this kind of organization already exist, both in evolution and in human society.

The Conquest of Bread has become a classic of political anarchist literature. It was heavily influential on both the Spanish Civil War and the Occupy movement.

Pyotr Alexeyevich Kropotkin (9 December 1842[ – 8 February 1921) was a Russian anarchist, socialist, revolutionary, historian, scientist, philosopher, and activist who advocated anarcho-communism.