True Nature: A Theory of Human Sexual Evolution. Parts 2–4
- Cite this article as:
- Gomes, C. Journal of the Gay and Lesbian Medical Association (2000) 4: 57. doi:10.1023/A:1009517724274
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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.