Animal Farm is a satirical allegorical novella, in the form of a beast fable, by George Orwell, first published in England on 17 August 1945. It tells the story of a group of anthropomorphic farm animals who rebel against their human farmer, hoping to create a society where the animals can be equal, free, and happy. Ultimately, the rebellion is betrayed, and under the dictatorship of a pig named Napoleon, the farm ends up in a state far worse than before.

According to Orwell, Animal Farm reflects events leading up to the Russian Revolution of 1917 and then on into the Stalinist era of the Soviet Union, a period when Russia lived under the Marxist–Leninist ideology of Joseph Stalin. Orwell, a democratic socialist, was a critic of Stalin and hostile to Moscow-directed Stalinism, an attitude that was critically shaped by his experiences during the Barcelona May Days conflicts between the POUM and Stalinist forces, during the Spanish Civil War. In a letter to Yvonne Davet, Orwell described Animal Farm as a satirical tale against Stalin ("un conte satirique contre Staline"), and in his essay, "Why I Write" (1946).