Citation
Settle, Jamie E.; Dawes, Christopher T.; Christakis, Nicholas A.; & Fowler, James H. (2010). Friendships moderate an association between a dopamine gene variant and political ideology. Journal of Politics. vol. 72 (4) pp. 1189-1198 , PMCID: PMC3265335Abstract
Scholars in many fields have long noted the importance of social context in the development of political ideology. Recent work suggests that political ideology also has a heritable component, but no specific gene variant or combination of variants associated with political ideology have so far been identified. Here, we hypothesize that individuals with a genetic predisposition toward seeking out new experiences will tend to be more liberal, but only if they are embedded in a social context that provides them with multiple points of view. Using data from the National Longitudinal Study of Adolescent Health, we test this hypothesis by investigating an association between self-reported political ideology and the 7R variant of the dopamine receptor D4 gene (DRD4), which has previously been associated with novelty seeking. Among those with DRD4-7R, we find that the number of friendships a person has in adolescence is significantly associated with liberal political ideology. Among those without the gene variant, there is no association. This is the first study to elaborate a specific gene-environment interaction that contributes to ideological self-identification, and it highlights the importance of incorporating both nature and nurture into the study of political preferences.URL
http://dx.doi.org/10.1017%2FS0022381610000617Keyword(s)
GeneticReference Type
Journal ArticleJournal Title
Journal of PoliticsAuthor(s)
Settle, Jamie E.Dawes, Christopher T.
Christakis, Nicholas A.
Fowler, James H.