A study published in the journal Antiquity [2022] suggested an ancient South American civilization spiked a beer-like drink with psychoactive drugs as a way of maintaining social cohesion and forging new bonds with surrounding communities. The findings offer some of the clearest archaeological evidence demonstrating how ancient civilizations used psychoactive substances for recreation and social cohesion...The Wari civilization flourished in the Peruvian Andes... Excavations revealed evidence the Wari were brewing large quantities of a beer-like drink known as chicha. The alcoholic beverage is common to a number of ancient civilizations in the region, however, spiking it with a hallucinogenic substance...