Aaron J. Leonard is a writer and historian with a focus on the history of radicalism and state suppression. He is the author of Heavy Radicals: The FBI's Secret War on America's Maoists and A Threat of the First Magnitude--FBI Counterintelligence & Infiltration: From the Communist Party to the Revolutionary Union. He is contributor to the History News Network, Jacobin, and Truthout. He has a BA in History from New York. He lives in Los Angeles.