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Greenbeard Genes: Theory and Reality
Philip G Madgwick1, Laurence J Belcher1, Jason B Wolf1
1Milner Centre for Evolution, and Department of Biology & Biochemistry, University of Bath, Bath BA2 7AY, UK.
Abstract:
Greenbeard genes were proposed as a cartoonish thought experiment to explain why altruism can be a selfish strategy from the perspective of genes. The likelihood of finding a real greenbeard gene in nature was thought to be remote because they were believed to require a set of improbable properties. Yet, despite this expectation, there is an ongoing explosion in claimed discoveries of greenbeard genes. Bringing together the latest theory and experimental findings, we argue that there is a need to dispose of the cartoon presentation of a greenbeard to refocus their burgeoning empirical study on the more fundamental concept that the thought experiment was designed to illustrate.
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