Aaron Leonard is a writer and historian. He is author of Heavy Radicals: The FBI’s Secret War on America’s Maoists (Zero Books, 2015), and is currently completing A Threat of the First Magnitude—FBI Counterintelligence & Infiltration: From the Communist Party to the Revolutionary Union—1962-1974, to be published by Repeater Books, UK. He has been a regular contributor to Truthout, Rabble.ca, the History News Network, PhysicsWorld, and Canadian Dimension magazine. His research interests focus on twentieth century US history, particularly Sixties history and the repressive elements in play in that period. He is also a veteran political activist who has participated and written on events ranging from protests by Iranian students aiming to depose the Shah in the late 1970s, the street actions in the wake of the torture of Abner Louima in 1996, to the wave of demonstrations surrounding the US invasion of Iraq in 2003. He has a B.A. in Social Science with a concentration in History, magna cum laude, from New York University. He lives in Brooklyn, New York.