Since 9/11, images of fanatical jihadists have become the international symbol of terrorism. In the wake of the attacks, journalists and academics alike have taken up the task of trying to make sense of these seemingly alien terrorist organizations. Many of these sources have perpetuated the idea that terrorists are unknowable or irrational. What is often missed is the degree to which terrorists have motivations that can be grasped and understood. In his new text, Dekmejian places terrorism within a spectrum of political violence, creating a typology of terror based on scale and intent as...