Prejudice is a bane of humanity. Unjustified aversive beliefs and affect are the primary proximal causes of aversive behavior toward groups. Such beliefs and sentiments cause aversive speech and physical violence. They also serve as justification for denying people rights and opportunities. Prejudice also creates a deadweight loss. For instance, many people refuse to trade with groups they dislike. Prejudice is the reason why so many people lead diminished lives.
So why do so many people have incorrect aversive beliefs about other groups (and commensurately, unjustified positive beliefs about their group)?
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