Theories are systematic and evidenced-based approaches to processes and phenomena. They help us categorize, understand, and predict outcomes. This article argues that multi-theoretical approaches to problem-solving and research trump single-theory research. The article chronicles the multi-theoretical approach to terrorism, crime, and mass shootings in an undergraduate homeland security course. The course applies five theories: social movement theory, social identity theory, radicalization, general strain theory, and lone-actor grievance-fueled violence to terrorism, crime, and mass shootings. 


John Comiskey

John Comiskey, Ed.D., is an Associate Professor of Homeland Security at Monmouth University. John is a retired NYPD Lieutenant and U.S. Coast Guard Reserve Senior Chief Petty Officer. He holds an M.A. in Homeland Security from the Naval Post Graduate School and a Doctor of Education from St. John Fisher University. John’s research interests include mass shootings, climate security, and homeland security curricula. John is the Editor of Journal of Security, Intelligence, and Resilience Education.

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No. 4 Theoretical Pathways to Terrorism, Crime, and Mass Shootings