ObjectivePolitical attitudes are predicted by the key ideological variables of right‐wing authoritarianism (RWA) and social dominance orientation (SDO), as well as some of the Big Five personality traits. Past research indicates that personality and ideological traits are correlated for genetic reasons. A question that has yet to be tested concerns whether the genetic variation underlying the ideological traits of RWA and SDO has distinct contributions to political attitudes, or if genetic variation in political attitudes is subsumed under the genetic variation underlying standard Big Five personality traits.MethodWe use data from a sample of 1987 Norwegian twins to assess the genetic and environmental relationships between the Big Five personality traits, RWA, SDO, and their separate contributions to political policy attitudes.ResultsRWA and SDO exhibit very high genetic correlation (r = 0.78) with each other and some genetic overlap with the personality traits of openness and agreeableness. Importantly, they share a larger genetic substrate with political attitudes (e.g., deporting an ethnic minority) than do Big Five personality traits, a relationship that persists even when controlling for the genetic foundations underlying personality traits.ConclusionOur results suggest that the genetic foundations of ideological traits and political attitudes are largely non‐overlapping with the genetic foundations of Big Five personality traits.

中文翻译：

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右翼威权主义和社会统治取向的遗传基础解释了超越大五人格的政治态度


客观政治态度是通过右翼威权主义（RWA）和社会统治取向（SDO）的关键意识形态变量以及一些大五人格特征来预测的。过去的研究表明，人格和意识形态特征由于遗传原因而相关。一个有待检验的问题是，RWA 和 SDO 意识形态特征背后的遗传变异是否对政治态度有明显的贡献，或者政治态度的遗传变异是否包含在标准大五人格特征背后的遗传变异之下。方法我们使用来自 1987 年挪威双胞胎样本的数据，用于评估五大人格特质、RWA、SDO 之间的遗传和环境关系，以及它们对政治政策态度的单独贡献。结果 RWA 和 SDO 表现出非常高的遗传相关性（ r = 0.78）彼此之间以及与开放性和宜人性的人格特征有一些遗传重叠。重要的是，他们与政治态度（例如驱逐少数族裔）的遗传基础比大五人格特征更大，即使在控制人格特征的遗传基础时，这种关系仍然存在。结论我们的结果表明，意识形态的遗传基础特征和政治态度在很大程度上与大五人格特征的遗传基础不重叠。