" They talk about adrenaline, but Marder knew it was much more than adrenaline; it was a mystical cocktail that comes only from this one act, from killing men at the risk of yourself dying, a Pleistocene inheritance, disgusting and marvelous at the same time. Sports, even violent sports, were just a pale shadow of this. Why they’d never abolish war. "

― Michael Gruber , The Return