Biology and Philosophy

, Volume 18, Issue 5, pp 683–694

A new group-selection model for the evolution of homosexuality

  • Jeff Kirby
Article

Abstract

Abstract. Scientists have long puzzled over how homosexual orientation has evolved, given the assumed low relative fitness of homosexual individuals compared to heterosexual individuals. A number of theoretical models for the evolution of homosexuality have been postulated including balance polymorphism, "Fertile females", hypervariability of DNA sequences, kin selection, and "parental manipulation". In this paper, I propose a new group-selection model for the evolution of homosexuality which offers two advantages over existing models: (1) its non-assumption of genetic determinism, and (2) its lack of dependency on an inefficient altruism relation and family dynamics theory.

Altruism Evolution Genetic determinism Group selection Homosexual orientation 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Jeff Kirby
    • 1
  1. 1.Department of BioethicsDalhousie UniversityHalifax, NSCanada

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