Religious terrorist organizations, primarily Islamist groups, are far more likely than other ideologically-motivated groups to launch and fight a sustained insurgency, a new study shows.
Most terrorism analyses focus on the deadliest and mature terrorist groups, such as the Islamic State (ISIS), Hizballah, and Hamas, overlooking similar terrorist groups that die out early or pose a lesser threat. Why do some terrorist groups evolve into full-blown insurgencies, while others remain clandestin...