What is the central idea of passage 1? i really need !

Jack London wrote “The Call of the Wild” as a short adventure novel. He published it in 1903. The story is set in Yukon, Canada, during the 1890s when strong sled dogs were in high demand, this is really important to mention because the central character of the novel, Buck, the dog, was stolen from its owners and sold as a sled dog. Buck becomes gradually savage in the hard environment, where he is forced to fight to survive and dominate other dogs. By the end, he sheds the veneer of civilization, and relies on primitive instinct and arises as a leader in the wild.

Perhaps the strongest main idea of the passage is:

that sometimes pride is the only thing that can push you to survive in harsh environments, sometimes the only manner to thrive and progress in difficult situations is reversing to feral instincts and letting the wild animal inside of you to take control and fight your way to the top.