Is Suicide Terrorism Really the Product of an Evolved Sacrificial Tendency? A Review of Mammalian Research and Application of Evolutionary Theory

Academic debates persist about the psychology of suicide terrorists, with one view being that they are psychologically healthy individuals who primarily engage in altruistic self-sacrifice to serve their family, organization, or cause. Some proponents of this view now argue that suicide attackers are actually responding to their evolved sacrificial tendencies. However, the present review questions this hypothesis. For one thing, it appears inconsistent with the evidence on which individuals become suicide bombers and why. More broadly, research from the animal kingdom suggests that there is an important limit to “selfless” or “altruistic” behavior among non-human mammals, which appear to have been naturally selected to save themselves rather than deliberately give up their lives to protect offspring from predation, infanticide, or starvation. Furthermore, kin selection theory suggests that intentional self-sacrifice would be maladaptive for virtually all mammals, including human beings, and that this behavioral tendency would not have been naturally selected after all.