Optimism.

The central truth of their lives was the past, the dimming memory of the wild, ecstatic freedom of the plains, of the days when Comanche warriors in black buffalo headdresses rode unchallenged from Kansas to northern Mexico, of a world without property or boundaries. What Quanah had that the rest of his tribe in the later years did not was that most American of human traits: boundless optimism.

S.C. Gwynne, from Empire of the Summer Moon: Quanah Parker and the Rise and Fall of the Comanches, the Most Powerful Indian Tribe in American History