The book by George Orwell "Animal Farm", tells the story of a group of farm animals who rebel against their human farmer, hoping to create a society where the animals can be equal, free, and happy.
The animals are lead by the pigs, who are the smartest of the animals. At first, the pigs are assuring the rest of the animals that they are all equal, and will be treated as such.
Things quickly take a turn and the pigs start to gradually abuse their power, making the other animals work like slaves and die off from hunger
It's a commentary on the idea of a communistic society, where everyone is equal, but some are more equal than others...
The design works on a second layer, the pigs also represent the superpowers of the world, America, China, and Russia. Playing with the fate of the world like they would a game of cards.