This image is from George Orwell's 1945 novella Animal Farm. The tale is an allegory for the Russian Revolution and life in Stalin's Soviet Union. In it, the boar Old Major (Karl Marx) plans a rebellion against the human owners of Manor Farm but dies before it can take place. Two young pigs, Snowball (Leon Trotsky) and Napoleon (Stalin) take up the cause and lead the animals in a successful revolution. The pigs take over leadership of the farm and this eventually leads to a power struggle between them. When Snowball announces plans to build a windmill, Napoleon opposes him and has his private army of attack dogs chase Snowball from the farm. Napoleon seizes power and builds the windmill, taking credit for the idea. From then on, Snowball is used as a scapegoat; when anything goes wrong on the farm, Napoleon spreads the word that Snowball is responsible, working from outside to sabotage the animals' efforts. He also has his dogs kill animals suspected of collaborating with Snowball in a series of purges. The parallels to Soviet Russia are obvious and ugly.