How does Buck's relationship with John Thornton contrast with his other owners?

Buck's relationship with John Thornton stands in stark contrast to his experiences with previous owners, primarily because it is characterized by a deep bond grounded in mutual respect and affection. Unlike the cruelty and abuse he faced from men like Hal and Charles, Thornton treats Buck with kindness and compassion, understanding him not merely as a tool for labor but as a being deserving of care. This nurturing relationship allows Buck to experience loyalty and love for the first time, showcasing a transformative connection that fulfills his emotional needs.

Thornton’s treatment of Buck also highlights the theme of friendship and loyalty that runs throughout "The Call of the Wild." This relationship allows Buck to shed the more primitive instincts he had developed to survive under harsher circumstances, reflecting a return to a more instinctual and primal state influenced by genuine companionship. Through this bond, Buck not only learns to trust again but also finds a purpose greater than mere survival, aligning him closely with Thornton and deepening their emotional connection.