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Runaway cultural niche construction

Research output: Contribution to journalArticle

DOI

Abstract

Cultural niche construction is a uniquely potent source of selection on human populations, and a major cause of recent human evolution. Previous theoretical analyses have not, however, explored the local effects of cultural niche construction. Here, we use spatially explicit coevolutionary models to investigate how cultural processes could drive selection on human genes by modifying local resources. We show that cultural learning, expressed in local niche construction, can trigger a process with dynamics that resemble runaway sexual selection. Under a broad range of conditions, cultural niche-constructing practices generate selection for gene-based traits and hitchhike to fixation through the build up of statistical associations between practice and trait. This process can occur even when the cultural practice is costly, or is subject to counteracting transmission biases, or the genetic trait is selected against. Under some conditions a secondary hitchhiking occurs, through which genetic variants that enhance the capability for cultural learning are also favoured by similar dynamics. We suggest that runaway cultural niche construction could have played an important role in human evolution, helping to explain why humans are simultaneously the species with the largest relative brain size, the most potent capacity for niche construction and the greatest reliance on culture.

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Original languageEnglish
Pages (from-to)823-835
Number of pages13
JournalPhilosophical Transactions of the Royal Society. B, Biological Sciences
Volume366
Issue number1566
DOIs
Publication statusPublished - 27 Mar 2011

    Research areas

  • niche construction, cultural transmission, gene-culture coevolution, human evolution, spatially explicit models, HUMAN GENOME, EVOLUTIONARY CONSEQUENCES, SEXUAL SELECTION, LACTASE-PERSISTENCE, ADAPTIVE EVOLUTION, BEHAVIOR, TRAITS, MODELS, DIET

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