What is the belief system that the animals of animal farm adopt and what real political system does it represent?

In George Orwell's "Animal Farm," the animals initially adopt Animalism, which promotes equality and the idea that all animals are comrades. However, as the story progresses, this belief system becomes corrupted, leading to a totalitarian regime under the pigs, particularly Napoleon. This represents the rise of Stalinism in the Soviet Union, where the ideals of communism are subverted by authoritarian rule and the concentration of power in the hands of a few. Ultimately, the animals' initial aspirations for equality devolve into a hierarchy that mirrors the oppressive systems they sought to escape.