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    Carmelics

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    LoyalLoyalJusticeJustice
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    Home/Original/inverse
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    Inverse View

    It is not the case that Natural selection can increase the proportion of organisms with characteristic C in a population without C itself being genetically encoded.

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    Reasons For

    2 perspectives
    Reason for 1 of 2
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    • 1.Natural selection requires that the selected-for trait itself be heritable, not merely a downstream effect of a heritable disposition.
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    • 2.If C is causally produced by the nest rather than encoded in the genome, C's heritability is environmental and breaks the genotype-phenotype link selection requires.
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    • 3.Without direct heritability of C, selection increases N but cannot be said to select *for* C, making the claim equivocate on what selection targets.
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    Reason for 2 of 2
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    • 1.Sterelny and Griffiths's 'causal parity' thesis entails that privileging genetic encoding over developmental environment misidentifies what carries evolutionary information.
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    • 2.However, parity cuts both ways: if environmental and genetic causes are symmetric, then C's frequency increase is attributable to habitat selection, not natural selection proper.
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    • 3.Therefore the scenario redescribes niche construction or cultural inheritance, which are distinct evolutionary processes from natural selection acting on genetic variation.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.Organism O has a genetically encoded disposition N to build a special kind of nest.
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    • 2.Being raised in this kind of nest causes O-type offspring to develop characteristic C.
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    • 3.Os with characteristic C enjoy greater reproductive success than those without C.
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