In 1943, there was an urgent need for Animal Farm. The Soviet Union had become Britain’s ally in the war against Nazi Germany, and criticism of Stalin’s brutal regime was either censored or discouraged. In any case, many intellectuals on the left still celebrated the Soviet Union, claiming that the terrors of its show trials, summary executions and secret police were either exaggerated or necessary.

But, to Orwell, Stalin was always a “disgusting murderer” and he wanted to remind people of this fact in a powerful and memorable way. But how to do it? A political essay would never reach a wide enough audience; a traditional novel would take too long to write. Orwell hit on the inspired idea of combining the moralism of the traditional ‘beast fable’ with the satire of Gulliver’s Travels.