Most prejudice reduces to two personality types

Evidence

The implications of McFarland and Adelson’s discovery, should it reappear in other populations and with other measures, overpower one. For if you want to explain the many kinds of prejudice exposed in this situation, they are largely matters of personality. And only two kinds of personality are basically involved: the social dominator and the rightwing authoritarian. — John T. Jost and Jim Sidanius, Political Psychology, 953

Categorization

• DEEPTHINKING: This is a striking reduction of prejudice to two personality variables — a claim that compresses an entire literature and invites sustained reflection because it seems to sideline situational causes. It resists one-sentence summary and stays with a reader.
• corroborated: 2 independent passages support this claim — John T. Jost and Jim Sidanius, Political Psychology, 953
• XREF: connects to: Group prejudice links to general personality traits rather than to psychiatric illness. — Rolf Wiggershaus, The Frankfurt School: Its History,…, 1833