“Having to kill. That was an odd thought to me. Civilized people like to think they don’t have to kill, but I don’t know of any sentient species that didn’t evolve from predators. Hunting and killing are very difficult, much more so than fleeing death. They require complex instincts that eventually lead to the development of intelligence. In a way, all of man’s highest creations—from art to literature to science—only came about because of his basic need to kill.”