But it did not all happen in a day, this giving over of himself, body and soul, to the man-animals. He could not immediately forego his wild heritage… - Jack London

The dominant primordial beast was strong in Buck

White Fang was glad to acknowledge his lordship, but it was lordship based upon superior intelligence and brute strength...There were deeps in his nature which had never been sounded. A kind word, a caressing touch of the hand, on the part of Gray Beaver, might have sounded these deeps; but Gray Beaver did not caress nor speak kind words. It was not his way.

As I, my real self, grew older, I entered more and more into the substance of my dreams. One may dream, and even in the midst of the dream be aware that he is dreaming, and if the dream be bad, comfort himself with the thought that it is only a dream. This is a common experience with all of us. And so it was that I, the modern, often entered into my dreaming, and in the consequent strange dual personality was both actor and spectator. And right often have I, the modern, been perturbed and vexed by the foolishness, illogic, obtuseness, and general all-round stupendous stupidity of myself, the primitive.