“Your race is appallingly alone in its world. No other mammalian species. No other ambisexual species. No animal intelligent enough even to domesticate as pets. It must color your thinking, this uniqueness. I don’t mean scientific thinking only, though you are extraordinary hypothesizers … But philosophically, emotionally: to be so solitary, in so hostile a world: it must affect your entire outlook.”

— Ursula K. Le Guin, The Left Hand of Darkness