Sylvia has these thoughts about buck after reading the call of the wild. 1. buck learns that he must obey the man with the club if he wishes to survive. 2. buck learns that, even among the dogs on his team, there can only be one true leader. 3. buck learns that he must be careful around certain animals because he could be killed like curly was killed. based on these thoughts, which thesis statement would be most appropriate for a literary analysis of themes within the novel? one major theme within the call of the wild is "both the wild and civilization have rules." buck learns this lesson as he deals with both civilization and the wild within the novel. as seen within the call of the wild, buck learns that both the wild and civilization have rules. this is a major theme that is developed throughout the novel. based on what buck learns within the call of the wild, "both the wild and civilization have rules" is a major theme of the novel. this is true of humans within society as well. buck learns the hard way that he must sometimes adapt to the rules of both civilization and the wild if he wishes to survive. this supports the idea that "both the wild and civilization have rules" is a major theme within the call of the wild.