The dominant and primordial beast

After Buck is kidnapped (dognapped) from his home in California, Buck slowly begins to discover his inner "wolf". Buck begins to understand the laws of man and the hierarchy of dogs. He feels the power of his wildness breaking through his domesticated slumber. Buck feels his primal canine roots grow stronger as he fights, kills, pulls the sled, and discovers the wild. 

"The dominant primordial beast was strong in Buck, and under the fierce condition of trail life it grew and grew. Yet it was a secret growth. His newborn cunning gave him poise and control..."