Animal Farm is an allegory about a group of farm animals who rebel against their human farmer, hoping to create a society where animals can be equal, free, and happy. However, the pigs who lead the rebellion gradually become corrupt and oppressive, turning into tyrants worse than the humans they replaced.
The Rebellion
The story begins when the animals of Manor Farm, inspired by a wise pig named Old Major, rebel against their human owner, Mr. Jones. The animals successfully drive out the humans and rename the property Animal Farm. They establish Seven Commandments of Animalism, with the most important being that all animals are equal. The pigs, being the most intelligent animals, take leadership roles in organizing the farm.
The Rise of Napoleon
Two pigs, Napoleon and Snowball, emerge as leaders but soon conflict over the farm's direction. Napoleon uses trained dogs to chase Snowball away and becomes the farm's sole leader. Napoleon then rewrites history and uses propaganda to convince the other animals that Snowball was always a traitor and that Napoleon alone led the rebellion.
Corruption and Control
As time passes, Napoleon and the other pigs begin to adopt human behaviors and privileges. They sleep in beds, drink alcohol, wear clothes, and live in the farmhouse while the other animals work harder for fewer rewards. The pigs gradually change the Seven Commandments to justify their special treatment and power. The working animals, particularly the horse Boxer, remain loyal despite their poor treatment.
The Final Betrayal
Napoleon becomes increasingly tyrannical, using fear and violence to control the animals. The pigs begin to trade with neighboring human farms and adopt human customs completely. By the novel's end, the pigs walk on two legs, wear clothes, and play cards with humans. The other animals cannot tell the difference between the pigs and the humans they once opposed.
Main Message
Animal Farm demonstrates how revolutionary ideals can be corrupted by those in power. The novel suggests that without constant vigilance, even well-intentioned movements can become oppressive. The book serves as a warning about how leaders can manipulate language and history to control populations and maintain power. 
Answer