“You’re right: we should give up responsibility for making any difficult moral judgments, and surrender to the dictates of natural selection. Evolution cares so much about our happiness that no one who’s obeyed an inherited urge has ever suffered a moment’s regret for it. History is full of joyful case studies of people who followed their natural instincts at every opportunity—fucking whoever they could, stealing whatever they could, destroying anything that stood in their way—and the verdict is unanimous: any behavior that ever helped someone disseminate their genes is a recipe for unalloyed contentment, both for the practitioners, and for everyone around them.” Tarek gripped the lectern tightly, but continued in the same calm voice. “You’re so gloriously, indisputably right: if there is sentient life behind the border, we should wipe these creatures out of existence, on the mere chance that they might do the same to us. Then we can learn to predicate everything else we do on the same assumptions: there is no other purpose to life than an eternity of grim persistence, and the systematic extinguishment of everything—outside ourselves, or within us—that stands in the way of that goal.”