The document summarizes several theories that attempt to explain prejudice and discrimination:
1) The frustration-aggression hypothesis argues that when goals are blocked, the resulting frustration leads to aggression, which is often displaced onto scapegoats like ethnic or religious minorities.
2) Adorno's authoritarian personality theory proposed that authoritarian child-rearing practices can lead to long-term clusters of prejudice by encouraging rigid thinking and identification with dominance. However, it does not fully explain rapid social changes in prejudice or its emergence on a societal level.
3) Social dominance theory attributes prejudice to acceptance of ideologies that legitimize social hierarchies and domination of some groups over others. People with a high desire for their own group