Abstract
This paper investigates the role of the concept of group heritability in group selection theory, in relation to the well-known distinction between ‘type 1’ and ‘type 2’ group selection (‘GS1’ and ‘GS2’). I argue that group heritability is required for the operation of GS1 but not GS2, despite what a number of authors have claimed. I offer a numerical example of the evolution of altruism in a multi-group population which demonstrates that a group heritability coefficient of zero is perfectly compatible with the successful operation of group selection in the GS2 sense. A diagnosis of why group heritability has wrongly been regarded as necessary for GS2 is suggested.
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Okasha, S. The concept of group heritability. Biology & Philosophy 18, 445–461 (2003). https://doi.org/10.1023/A:1024140123391
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DOI: https://doi.org/10.1023/A:1024140123391