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    Home/Original/inverse
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    Inverse View

    It is not the case that Altruism evolves under perfect correlation between partners.

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    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.Perfect correlation between partners is an idealized limit condition that never obtains in natural populations with any degree of mixing.
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    • 2.Hamilton's own inclusive fitness framework requires only that relatedness r > cost/benefit ratio, not perfect assortment, for altruism to spread.
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    • 3.A model that requires perfect correlation to generate altruism explains evolutionary altruism only under conditions that vacate the explanandum's biological interest.
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    Reason for 2 of 2
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    • 1.Skyrms and Kitcher argue that correlation-based models conflate the causal mechanism of altruism's spread with a mere bookkeeping redescription of self-interest.
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    • 2.If altruists only ever interact with altruists under perfect correlation, the fitness gain accrues to a closed group, making 'altruism' indistinguishable from sophisticated within-group self-interest.
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    • 3.Sober and Wilson's levels-of-selection analysis shows that what appears as altruism under perfect correlation is better described as group selection, not genuine other-directed sacrifice.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.Under perfect correlation, selfish types are always paired with selfish types and altruists with altruists, so P(S partner/S) = P(A partner/A) = 1.
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    • 2.This assumption implies W(A) = 11 and W(S) = 5.
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    • 3.When W(A) > W(S), altruism evolves.
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