Animal Farm by George Orwell
The novel is an allegory. The story is about a group of farm animals that revolts against its human-master, to take control of the farm, hopeful that this will lead to its betterment.
But soon idealism is replaced by opportunism & greed for power. It’s a political satire & commentary on Russian Revolution and the misplaced romanticism around Russian socialism that existed back in the day.
More specifically it’s critical towards means & methods used by Joseph Stalin.
Generally speaking though, it describes politics & people in power and how they tend to manipulate their loyal but naive followers, with stunning accuracy.