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It is known from theoretician in the field of kin selection that kin selection (inclusive fitness theory) and group selection are actually two sides of the same coin. In other words, these two concepts are actually only one single process.


  • Is group selection equivalent to kin selection for any evolutionary game or exclusively for the prisoner's dilemna?
  • Can you please provide an intuitive explanation of why kin- and group-selection are the same thing?
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I found this pnas.org/content/104/16/6736.full , Am I in the right direction? –  Devashish Das Jul 21 '14 at 13:02
Yes it seems to be in the right direction, given the title at least. This paper however failed (at first look) to give me a intuition of why these two concepts are the same process. Thanks @DevashishDas –  Remi.b Jul 21 '14 at 13:36

1 Answer 1

Regarding the equivalence of MLS and kin selection, here is how I see the equivalence between these two approaches to selection. MLS says that cooperation is favored when the response to between-group selection outweighs within-group selection. Price's equation tells us that this happens when the genetic variance between-groups is higher than the genetic variance within-groups. This is equivalent to saying that altruists tend to interact with other altruists and, accordingly, that the coefficient of relatedness increases.

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