I don’t know. Do men kill men, except in madness? Does any beast kill its own kind? Only the insects. These yumens kill us as lightly as we kill snakes. The one who taught me said that they kill one another, in quarrels, and also in groups, like ants fighting. I haven’t seen that. But I know they don’t spare one who asks life. They will strike a bowed neck, I have seen it! There is a wish to kill in them, and therefore I saw fit to put them to death.
The Word for World is Forest, Ursula K. Le Guin