John Horgan

John Horgan is Distinguished University Professor in Georgia State University's Department of Psychology, where he directs the Violent Extremism Research Group. He is frequently consulted by law enforcement and national security agencies, and he has testified before Congress. His many books include The Psychology of Terrorism (second edition, 2014) and Divided We Stand: The Strategy and Psychology of Ireland's Dissident Terrorists (2012).

John Horgan is Distinguished University Professor in Georgia State University's Department of Psychology, where he directs the Violent Extremism Research Group. He is frequently consulted by law enforcement and national security agencies, and he has testified before Congress. His many books include The Psychology of Terrorism (second edition, 2014) and Divided We Stand: The Strategy and Psychology of Ireland's Dissident Terrorists (2012). See less