What man vs himself conflict in The Call of the Wild?

The main man vs himself conflict in The Call of the Wild is that of Buck's struggle to retain his humanity while embracing his wild instincts. As Buck is domesticated and then forced to confront the harsh realities of the Yukon, he faces the constant dilemma of choosing between following his animalistic, natural desires and remaining obedient to human commands. Throughout the novel, Buck grapples with this internal conflict as he is torn between his loyalty to John Thornton and his longing for the freedom and power of the wild.