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Eusociality and Kin Selection

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Eusociality is cooperative brood care, overlapping generations, and division of labor; kin selection explains sterile workers via inclusive fitness.

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A sterile worker bee raises her queen's brood, sharing many of her genes, raising inclusive fitness despite zero direct reproduction.

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Selection does not act for the species' good — sterility persists because it raises the worker's own gene copies, not colony welfare.

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