How does Animal Farm present the theme that "absolute power corrupts absolutely"?

During the rebellion it seemed as if the animals were all working toward the same end. Afterward, Orwell demonstrates the fact that oppression is cyclical and the oppressed becomes the oppressor when given the chance. In otherwords, when Napoleon took power, he intended to keep it by any necessary means. By the novel’s end, the pigs are indistinguishable from the humans not only in behavior but also in appearance. Their transformation is complete when they adopt two-legged walking. They treat the animals in the autocratic manner of Jones. In this sense, the story has come full circle.