What theme is central to Buck’s journey throughout the story?

The central theme of Buck’s journey in "The Call of the Wild" is the struggle for survival in the wilderness. Throughout the story, Buck transitions from a domesticated pet living a comfortable life in California to a wild creature navigating the harsh conditions of the Yukon. This transformation highlights the primal instincts that emerge when Buck is faced with the challenges of survival, such as finding food, bonding with other dogs, and understanding the dynamics of pack life.

Buck’s experiences illustrate not only the physical challenges of survival but also the emotional and psychological hurdles he must overcome. As he learns to harness his instincts, he becomes more attuned to the laws of nature, realizing that survival often depends on strength, adaptability, and a willingness to confront danger. This theme is vividly portrayed through Buck's evolution and ultimately culminates in his acceptance of his wild heritage.

Other themes like the conflict between man and machine, the struggle for wealth, and the importance of friendship may play secondary roles, but none resonate as strongly throughout Buck’s entire journey as his determination to survive in a brutal and unforgiving wilderness.