It shows an evolution which will alienate him from society for the rest of his life. Indeed, Gulliver has found a race of talking horses that have the perfect society with no crime or vices or any form of corruption. These race of Houyhnhnms is the master of the island and rules over savage, dirty and grotesque humanoid creatures which are called the Yahoos. After spending sometime in the island, Gulliver feels more Houyhnhnm than human and considers humans a backward species. It is to be noted nonetheless, that Gulliver is rescued by a Portuguese captain that is very generous and sensitive and his refusal and disgust to acknowledge this implies that he still has the vice of pride very much ingrained in his nature.
According to evidence from the worldwide internet, it was stated that it was a sin directly from Atticus.
Atticus is an ancient philosopher exactly.
It is unusual that I don't have much more else to say, and I apologize that I can not explain anymore.
If this can be brainliest, I would appreciate it!