FWIW, the human birth process is not viable without cultural accumulation. Baby heads are too damn big and kill women if they don't have a midwife to help them

FWIW, the human birth process is not viable without cultural accumulation. Baby heads are too damn big and kill women if they don't have a midwife to help them through. But it's a cycle and the midwife is only helpful herself because she has an oversized brain to pass along cultural knowledge.