Group aggression is an important concern for societies around the world. The field of intergroup relations, a sub-field of social-psychology, offers critical insight into the emergence of group conflict and aggression. This review examines the most influential theoretical frameworks from the field of intergroup relations, namely realistic conflict theory, relative deprivation theory, social identity theory, social dominance theory, and deindividuation theory. Associated empirical findings regarding groups synonymous with aggression, such as street gangs, hate groups, rebel and insurgent groups, and terrorist organizations, are explored. This review thus provides a critical overview of the current state of the field. It concludes with implications for the future of intergroup aggression research, drawing on integrated theories that account for both personal and situational factors.
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Authors: James Densley and Jillian Peterson