Before Colombia became one of the world’s largest producers of cocaine in the 1980s, traffickers from the Caribbean coast partnered with American buyers in the 1970s to make the South American country the main supplier of marijuana for a booming US drug market, fueled by the US hippie counterculture. How did Colombia become central to the creation of an international drug trafficking circuit? Marijuana Boom is the story of this forgotten history. Combining deep archival research with unprecedented oral history, Lina Britto deciphers a puzzle: Why did the Colombian coffee republic, a model of Latin American representative democracy and economic modernization, transform into a drug paradise, and at what cost?