Hated by his kind and by mankind, indomitable, perpetually warred upon and himself waging perpetual war, his development was rapid and one–sided. This was no soil for kindliness and affection to blossom in. Of such things he had not the faintest glimmering. The code he learned was to obey the strong and to oppress the weak. Grey Beaver was a god, and strong. Therefore White Fang obeyed him. But the dog younger or smaller than himself was weak, a thing to be destroyed. His development was in the direction of power. In order to face the constant danger of hurt and even of destruction, his predatory and protective faculties were unduly developed. He became quicker of movement than the other dogs, swifter of foot, craftier, deadlier, more lithe, more lean with ironlike muscle and sinew, more enduring, more cruel, more ferocious, and more intelligent. He had to become all these things, else he would not have held his own nor survive the hostile environment in which he found himself.