Napoleon is described early in the book as a "large, rather fierce-looking Berkshire boar." He is obviously gifted intellectually, as he, Snowball, and Squealer are the ones who develop Animalism out of the teachings of Old Major. He is also very cunning, as he demonstrates by repeatedly subverting the ideology and meaning of the animals' revolution to suit his own ends. He is ruthless, using the dogs to eliminate the "enemies" of the revolution, particularly the young porkers and the hens. He is pragmatic, turning his back on the core tenets of Animalism to reach out to the humans. Finally, he is completely corrupted by the power that he assumes in the wake of the Revolution. By the end of the book, he is indistinguishable from the very humans the animals fought to emanicipate themselves from in the first place.