| Quote #1
[…] and he stormed and raged at them through the bars. They only laughed and poked sticks at him, which he promptly assailed with his teeth till he realized that that was what they wanted. Whereupon he lay down sullenly and allowed the crate to be lifted into a wagon. (1.23)
Buck chooses to submit when he realizes the futility of fighting.
| Quote #2
As he spoke he fearlessly patted the head he had so mercilessly pounded, and though Buck's hair involuntarily bristled at touch of the hand, he endured it without protest. When the man brought him water he drank eagerly, and later bolted a generous meal of raw meat, chunk by chunk, from the man's hand. (1.39)
Buck sometimes chooses pragmatism over pride; he is too hungry and worn out to refuse food from the man that beat him.
| Quote #3
Though his dignity was sorely hurt by thus being made a draught animal, he was too wise to rebel. (2.5)
Buck’s adaptation to the wild involves a mental component as well as a physical one – he learns when to fight and when to submit.