Marc Sageman

Marc Sageman, M.D., Ph.D., is a former foreign service officer who was based in Islamabad from 1987 to 1989, where he worked closely with Afghanistan's mujahedin. He has advised various branches of the U.S. government in the war on terror and is a forensic psychiatrist in private practice in Washington, D.C. His second book, Leaderless Jihad: Terror Networks in the Twenty-First Century, is also available from the University of Pennsylvania Press.