Open AccessThe evolutionary genetics of personality
Author(s) -
Penke Lars,
Denissen Jaap J. A.,
Miller Geoffrey F.
Publication year - 2007
Publication title -
european journal of personality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.839
H-Index - 84
eISSN - 1099-0984
pISSN - 0890-2070
DOI - 10.1002/per.629
Subject(s) - personality , behavioural genetics , psychology , selection (genetic algorithm) , big five personality traits , human evolutionary genetics , evolutionary biology , cognitive psychology , social psychology , genetics , developmental psychology , biology , artificial intelligence , computer science , genome , gene
Genetic influences on personality differences are ubiquitous, but their nature is not well understood. A theoretical framework might help, and can be provided by evolutionary genetics. We assess three evolutionary genetic mechanisms that could explain genetic variance in personality differences: selective neutrality, mutation‐selection balance, and balancing selection. Based on evolutionary genetic theory and empirical results from behaviour genetics and personality psychology, we conclude that selective neutrality is largely irrelevant, that mutation‐selection balance seems best at explaining genetic variance in intelligence, and that balancing selection by environmental heterogeneity seems best at explaining genetic variance in personality traits. We propose a general model of heritable personality differences that conceptualises intelligence as fitness components and personality traits as individual reaction norms of genotypes across environments, with different fitness consequences in different environmental niches. We also discuss the place of mental health in the model. This evolutionary genetic framework highlights the role of gene‐environment interactions in the study of personality, yields new insight into the person‐situation‐debate and the structure of personality, and has practical implications for both quantitative and molecular genetic studies of personality. Copyright © 2007 John Wiley & Sons, Ltd.