When the apostle Paul proclaimed the new Christian Mystery to the factious congregation at Corinth, it was clear that this Eucharist was meant to replace the pagan Mystery that had been celebrated for over a millennium just a short distance away at the sanctuary of Eleusis. Christianity evolved within the context of Judaic and Hellenistic healing cults, magic, shamanism, and Mystery initiations. All four of these inevitably imply a sacred ethnopharmacology,...