For anyone who has tried to talk sense with a Teabagger or Christopublican, this should come as no surprise:
Conservatism Thrives on Low Intelligence and Poor Information
by George Monbiot
The Guardian (UK)
For a more scholarly explanation:
Bright Minds and Dark Attitudes
Lower Cognitive Ability Predicts Greater Prejudice Through Right-Wing Ideology and Low Intergroup Contact
Gordon Hodson and
Michael A. BusseriBrock University
Gordon Hodson, Department of Psychology, Brock University, 500 Glenridge Ave., St. Catharines, Ontario, Canada L2S 3A1 E-mail: ghodson@brocku.caAbstract
Despite their important implications for interpersonal behaviors and relations, cognitive abilities have been largely ignored as explanations of prejudice. We proposed and tested mediation models in which lower cognitive ability predicts greater prejudice, an effect mediated through the endorsement of right-wing ideologies (social conservatism, right-wing authoritarianism) and low levels of contact with out-groups. In an analysis of two large-scale, nationally representative United Kingdom data sets (N = 15,874), we found that lower general intelligence (g) in childhood predicts greater racism in adulthood, and this effect was largely mediated via conservative ideology. A secondary analysis of a U.S. data set confirmed a predictive effect of poor abstract-reasoning skills on antihomosexual prejudice, a relation partially mediated by both authoritarianism and low levels of intergroup contact. All analyses controlled for education and socioeconomic status. Our results suggest that cognitive abilities play a critical, albeit underappreciated, role in prejudice. Consequently, we recommend a heightened focus on cognitive ability in research on prejudice and a better integration of cognitive ability into prejudice models.