The novel “Call Of the Wild”, by Jack London, explains many themes throughout the book. An important theme throughout the novel is “Kill or be killed.” While Buck is trying to adapt to his new surroundings, he has to learn how to survive and fight. Each owner and dog in the novel has to survive for themselves just like Buck does throughout the whole novel. If Buck doesn’t kill for food or for his new owners throughout the novel, he could be killed himself. When Buck and Spitz get into a fight, Buck has a risk of dying, so he ends up killing Spits for leading dog. If Buck doesn’t kill Spitz, Spitz could kill Buck, and stay the lead dog. Later on in the novel, Buck gets attacked by a wolf, if Buck wants to survive, he'll have to get fully wild