Mind-altering substances have been used by humans for thousands of years. In fact, ancient societies sometimes encouraged the consumption of drugs. Focusing on the archaeological study of how various entheogens have been used in the past, this volume examines why humans have social and psychological needs for these substances. Contributors trace the long-term use of drugs in ancient cultures and highlight the ways they evolved from being sacred to recreational in more modern times. By analyzing evidence of these substances across a diverse range of ancient cultures, the contributors explore how and why past civilizations harvested, manufactured, and consumed drugs. Case studies examine the use of stimulants, narcotics, and depressants by hunter-gatherers who roamed Africa and Eurasia, prehistoric communities in North and South America, and Maya kings and queens. Offering perspectives from many different fields of study, contributors illustrate the wide variety of sources and techniques that can provide information about materials that are often invisible to archaeologists. They use advanced biomolecular procedures to identify alkaloids and resins on cups, pipes, and other artifacts. They interpret paintings on vases and discuss excavations of breweries and similar sites. Uncovering signs of drugs, including ayahuasca, peyote, ephedra, cannabis, tobacco, yaupon, vilca, and maize and molle beer, they explain how psychoactive substances were integral to interpersonal relationships, religious practices, and social cohesion in antiquity. Contributors: Quetta Kaye | Victor D. Thompson | Thomas J. Pluckhahn | Sean Rafferty | Mark Merlin | Matt Sayre | Constantino Manuel Torres | Zuzana Chovanec | Jennifer A. Loughmiller-Newman | Justin Jennings | Daniel M. Seinfeld | Shannon Tushingham | Scott M. Fitzpatrick | Ancient Psychoactive Substances by Scott M. Fitzpatrick, Paper over Board | Indigo Chapters