Recent studies have documented a shift from moderate political attitudes to more extreme attitudes at the ends of the political spectrum. This can be seen in Political Correctness (PC) on the left, and white identitarian (WI) attitudes on the 'Alt-Right' (AR). While highly covered in mainstream media, limited academic research has investigated their possible antecedents and psychological correlates. The current study investigated the prevalence and psychological predictors of these attitudes. Utilising a quota-based sample of 512 U.S. participants, we found that extreme political attitudes were associated with various personality traits, social media use, and upbringing. PC attitudes were associated with agreeableness, black-white thinking, social-media use, and perceived overprotective parenting. WI attitudes were associated with low agreeableness and openness, and high black-white thinking. Our results show that extreme left and right attitudes are separated by individual differences, and that authoritarianism can be seen on both the left and the right.

It is well established that mainstream personality traits are associated with moderate, traditional political attitudes. However, very little is known regarding trait predictors of extreme political attitudes. In the current study (N ¼ 511 U.S. residents), we examined the relationships between the Dark Triad traits, Entitlement and three extreme political attitudes that are highly covered in mainstream media: White Identitarianism ('Alt-Right'), Political Correctness-Authoritarianism, and Political Correctness-Liberalism. We found that Dark Triad traits and Entitlement had incremental validity in the prediction of these 3 attitudes over demographic factors. The Dark Triad traits and Entitlement explained a substantial portion of variance in White Identitarianism and Political Correctness-Authoritarianism, and only a small portion of variance in Political Correctness-Liberalism. Across all attitudes, Psychopathy and Entitlement were the most consistent, strongest predictors. Results indicate that, from a Dark Triad perspective, Authoritarian PC advocates have more in common with extreme right advocates than those holding PC views related to compassion.

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