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The Evolution of Sociality

The Evolution of Sociality

(p.137) 7 The Evolution of Sociality
Adaptation in Metapopulations
Michael J. Wade
University of Chicago Press

This chapter contains a discussion of Maynard Smith’s conceptual distinction between kin and group selection. The author discusses the design and experimental study of kin selection for and against cannibalism as a test of the definitional distinction. The fallacy that societies are vulnerable to cheaters is discussed along with the concept of a “kin-selection mutation balance.” The results of models with three levels of selection as well as models of the effect of inbreeding on kin selection are presented. The synergistic coevolution of mating system and sociality are illustrated and the underlying processes governing the run-away evolution of sociality are discussed. The advantage of the multilevel selection perspective over the inclusive fitness perspective is illustrated by drawing from counter-factual predictions of inclusive fitness theory and its inability to account for underlying processes of genetic change.

Keywords:   coevolution of sociality and mating system, fallacy of cheaters as a universal threat to sociality, group selection, inbreeding, inclusive fitness theory, kin selection, multilevel selection theory

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