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Altruism

  • Altruism, selfishness, spite
    • William D. Hamilton (1964, 1970)
  • Inclusive fitness
  • Shared genetic material between related animals
  • Coefficient of relationship, r
    • Siblings, r = 1/2; uncle, r = 1/4, first cousins, r = 1/8
  • k > 1/r

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