Animal Farm is a novella by George Orwell, and is the most famous satirical allegory of Soviet totalitarianism. Published in 1945, the book reflects events leading up to and during the Stalin era. Orwell, a democratic socialist, and a member of the Independent Labour Party for many years, was a critic of Joseph Stalin, and was suspicious of Moscow-directed Stalinism after his experiences with the NKVD during the Spanish Civil War.

The book was chosen by Time Magazine as one of the 100 best English-language novels (1923 to 2005) and was number 31 on the Modern Library List of Best 20th-Century Novels.