Isaac Campos is the author of Home Grown: Marijuana and the Origins of Mexico’s War on Drugs (University of North Carolina Press, 2012). Campos is an assistant professor of history at the University of Cincinnati. His book traces the intellectual history of marijuana from Europe to Mexico and the ways in which usage of the drug was portrayed – as a source of madness and violence — in the Mexican media. Campos turns on its head the popular myth that drug regulation in Mexico derives from US sources. For political scientists and for all those interested in the issue, the book offers a deep historical context for the current “war on drugs” and related violence in the US and in Mexico.