"Man, being the strongest of all animals, differs from the rest; he was obliged to be his own domesticator; he had to tame himself. And the way in which it happened was that the most obedient, the tamest tribes are, at the first stage in the real struggle of life, the strongest and the conquerors. All are very wild then; the animal vigor, the savage virtue of the race has died out in none, and all have enough of it. But what makes one tribe—one incipient tribe, one bit of a tribe—to differ from another is their relative faculty of coherence. The slightest symptom of legal development, the least indication of a military bond, is then enough to turn the scale. The compact tribes win, and the compact tribes are the tamest. Civilization begins, because the beginning of civilization is a military advantage." Walter Bagehot