John Hagedorn is the author of People & Folks, Gangs, Crime, and the Underclass in a Rustbelt City. This book re-framed the study of gangs in the United States by focusing on the impact of deindustrialization. He is currently studying why Chicago’s homicide rate has not decline like New York City’s. He is beginning a study of “armed young men” around the world, including institutionalized gangs, para-militaries, militant fundamentalists, terrorists, and drug cartels. He is co-editor of Female Gangs in America: Essays on Girls, Gangs, and Gender, the only edited volume ever published in the U.S. on female gangs. He is the designer of the website: gangresearch.net and is currently writing a history of gangs in Chicago. He is an Associate Professor of Criminal Justice at UIC.