“You’re a species of gangly distance runners, adapted to sweat and throw stuff. You like watching each other fuck. A few million years ago you developed culture in the form of survival techniques, and whoever learned culture the fastest could have the most babies. Your brains started to swell and reorganize themselves for cultural learning. The development of culture and the development of large brains drove each other in a feedback loop. Your brain grew as large as it could before exhausting the mother’s supply of calories—”
