A scientific field that studies the psychological processes leading to the commission of genocide or crimes against humanity, including group motivation, submission, shared emotions, and moral justification of violence. It focuses on understanding the mechanisms of the development of collective aggressive behavior, the role of group affiliation, and the influence of psychological dynamics on extremist decision-making. The aim of this area is to develop preventive strategies, humanitarian policies and awareness-raising programmes to counter collective extremism and strengthen societal resistance to violent deviance.