Prejudice and the extremist violence that arises from it are typically explained either by the psychopathology of individual perpetrators, or by their membership of extremist groups. This project will seek to reconcile these competing explanations. It will resolve the stalemate that has stalled progress in combating prejudice. This project develops a new framework specifying causal and reciprocal links between the novel concept of thwarted identity and psychopathology, ideology, and prejudice. Expected outcomes are novel targets for interventions to reduce prejudice and extremist violence, and new policy solutions that deliver significant benefit by addressing these pernicious social problems.