Modern destructive capacity makes understanding intergroup aggression a survival imperative

Evidence

Intergroup conflict is currently life-threatening in such diverse geographical contexts as the streets of Los Angeles, the mountain villages of Bosnia, and the forests of Uganda. While intergroup and interethnic violence has been a feature of human society for as long as anyone can remember, modern technological capacities for destructiveness mean that the understanding and control of aggressive impulses is imperative if our species is to survive. — John T. Jost and Jim Sidanius, Political Psychology, 134