Altruism toward similar individuals evolves through kin selection

the verdict

SUPPORTED

the evidence backs this

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3 sources for · 0 against

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The claim that altruism toward similar individuals evolves through kin selection is strongly supported by evolutionary theory and familial selection models.

The analysis

The retrieved literature consistently confirms that inclusive fitness and kin selection provide the foundational framework for explaining the evolution of altruism among genetically related individuals.

Evidence for · 3

Social Evolution and Inclusive Fitness Theory

Recorded source metadata

James A.R. Marshall. Social Evolution and Inclusive Fitness Theory. 2015. https://doi.org/10.23943/princeton/9780691161563.001.0001

Inclusive fitness theory explains that altruistic behaviors toward genetic relatives evolve because they propagate shared genes.

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More for · 2

Survival cost sharing among altruistic full siblings in Mendelian population.

Recorded source metadata

Garay J, López I, Varga Z, Csiszár V, Móri TF. Survival cost sharing among altruistic full siblings in Mendelian population.. 2024. https://doi.org/10.1186/s12862-024-02317-z

Familial selection models demonstrate that altruism among siblings can evolve under conditions specified by Hamilton's rule.

Source citation format

Extraordinary siblings: Mole rats, marmosets, and Radcliffe-Brown.

Recorded source metadata

Jones D. Extraordinary siblings: Mole rats, marmosets, and Radcliffe-Brown.. 2025. https://doi.org/10.1371/journal.pone.0319385

Kin selection theory accounts for how organisms provide extraordinary altruistic advantages to close genetic relatives.

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The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8301 Aug 2026

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