Chavín and the First Andean Civilization
High in the Andes, a temple complex drew pilgrims from across Peru for six centuries — not a capital of an empire but a destination, spreading a shared art style and religion far beyond anything it governed. Its underground galleries were built with ducts and channels that made water roar through the stone, and pilgrims were given hallucinogenic cactus before being led into the dark. The Chavín had no writing and no army anyone can find. They spread an idea across a region by making people come to it.
A belief system rises, spreads, institutionalizes, and then schisms — changing the rules people accept as legitimate.