True Nature: A Theory of Human Sexual Evolution. Parts 2–4

  • Christopher Gomes


Intelligence is of greater species survival value than instincts over long evolutionary periods. Sufficient increases in the intelligence of a species cause natural selection to favor a corresponding decrease in the species' instinctive makeup. The human line uniquely crossed a threshold of intelligence during evolution that allowed humans to lose their sexual instinct. Devoid of a sexual instinct, human sexual orientation is fully a function of individual experience. Exploratory behaviors that infants innately display involving their own body have the greatest potential to bias the formation of a homosexual orientation. To survive, societies have always had to counter this natural developmental pathway with a social environment that has encouraged heterosexuality and to varying extents restricted the expression of homosexuality.

intelligence instinct evolution sexual orientation homosexuality 


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Copyright information

© Gay and Lesbian Medical Association 2000

Authors and Affiliations

  • Christopher Gomes
    • 1
  1. 1.BramptonCanada L6X 1J1

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