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The origin of preferences and values is an unresolved theoretical problem in behavioural sciences. The Savanna-IQ Interaction Hypothesis, derived from the Savanna Principle and a theory of the evolution of general intelligence, suggests that more intelligent individuals are more likely to acquire and espouse evolutionarily novel preferences and values than less intelligent individuals, but general intelligence has no effect on the acquisition and espousal of evolutionarily familiar preferences and values. Ethnographies of traditional societies suggest that exclusively homosexual behaviour was probably rare in the ancestral environment, so the Hypothesis would predict that more intelligent individuals are more likely to identify themselves as homosexual and engage in homosexual behaviour. Analyses of three large, nationally representative samples (two of which are prospectively longitudinal) from two different nations confirm the prediction.

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H. E. Adams , L. W. Wright & B. A. Lohr (1996) Is homophobia associated with homosexual arousal? Journal of Abnormal Psychology 105, 440445.

G. R. Arabsheibani , A. Marin & J. Wadsworth (2005) Gay pay in the UK. Economica 72, 333347.

J. M. Bailey & R. C. Pillard (1991) A genetic study of male sexual orientation. Archives of General Psychiatry 48, 10891096.

R. Blanchard & A. F. Bogaert (1996) Biodemographic comparisons of homosexual and heterosexual men in the Kinsey interview data. Archives of Sexual Behavior 25, 551579.

M. L. Chivers , M. C. Seto & R. Blanchard (2007) Gender and sexual orientation differences in sexual response to sexual activities versus gender of actors in sexual films. Journal of Personality and Social Psychology 93, 11081121.

R. H. Crapo (1995) Factors in the cross-cultural patterning of male homosexuality: a reappraisal of the literature. Cross-Cultural Research 29, 178202.

C. B. Crawford (1993) The future of sociobiology: counting babies or proximate mechanisms? Trends in Ecology and Evolution 8, 183186.

F. B. M. de Waal (1989) Food sharing and reciprocal obligations among chimpanzees. Journal of Human Evolution 18, 433459.

F. B. M. de Waal , L. M. Luttrell & M. E. Canfield (1993) Preliminary data on voluntary food sharing in brown capuchin monkeys. American Journal of Primatology 29, 7378.

I. J. Deary , G. D. Batty & C. R. Gale (2008) Bright children become enlightened adults. Psychological Science 19, 16.

I. J. Deary , M. C. Whiteman , J. M. Starr , L. J. Whalley & H. C. Fox (2004) The impact of childhood intelligence on later life: following up the Scottish Mental Surveys of 1932 and 1947. Journal of Personality and Social Psychology 86, 130147.

L. M. Diamond (2008) Sexual Fluidity: Understanding Women's Love and Desire. Harvard University Press, Cambridge.

L. Ellis (1998) NeoDarwinian theories of violent criminality and antisocial behavior: photographic evidence from nonhuman animals and a review of the literature. Aggression and Violent Behavior 3, 61110.

L. Ellis & M. A. Ames (1987) Neurohormonal functioning and sexual orientation: a theory of homosexuality–heterosexuality. Psychological Bulletin 101, 233258.

P. D. Evans , S. L. Gilbert , N. Mekel-Bobrov , E. J. Vallender , J. R. Anderson , L. M. Vaez-Azizi (2005) Microcephalin, a gene regulating brain size, continues to evolve adaptively in humans. Science 309, 17171720.

G. G. Gallup Jr. & S. D. Suarez (1983) Homosexuality as a by-product of selection for optimal heterosexual strategies. Perspectives in Biology and Medicine 26, 315322.

C. Grov , D. S. Bimbi , J. E. Nanín & J. T. Parsons (2006) Race, ethnicity, gender, and generational factors associated with the coming-out processes among gay, lesbian, and bisexual individuals. Journal of Sex Research 43, 115121.

D. H. Hamer , S. Hu , V. L. Magnuson , N. Hu & A. M. I. Pattatucci (1993) A linkage between DNA markers on the X chromosome and male sexual orientation. Science 261, 321327.

M. G. Haselton & D. Nettle (2006) The paranoid optimist: an integrative evolutionary model of cognitive biases. Personality and Social Psychology Review 10, 4766.

J. M. Hilbe (2007) Negative Binomial Regression. Cambridge University Press, Cambridge.

S. Kanazawa (2001) De gustibus est disputandum. Social Forces 79, 11311163.

S. Kanazawa (2002) Bowling with our imaginary friends. Evolution and Human Behavior 23, 167171.

S. Kanazawa (2004a) The Savanna Principle. Managerial and Decision Economics 25, 4154.

S. Kanazawa (2008) Temperature and evolutionary novelty as forces behind the evolution of general intelligence. Intelligence 36, 99108.

S. Kanazawa (2010b) Evolutionary psychology and intelligence research. American Psychologist 65, 279289.

S. Kanazawa & J. E. E. U. Hellberg (2010) Intelligence and substance use. Review of General Psychology 14, 382396.

S. Kanazawa & D. L. Novak (2005) Human sexual dimorphism in size may be triggered by environmental cues. Journal of Biosocial Science 37, 657665.

S. Kanazawa & K. Perina (2009) Why night owls are more intelligent. Personality and Individual Differences 47, 685690.

M. R. Kauth (2000) True Nature: A Theory of Sexual Attraction. Kluwer, New York.

K. M. Kirk , J. M. Bailey , M. P. Dunne & N. G. Martin (2000) Measurement models for sexual orientation in a community of twin sample. Behavior Genetics 30, 345356.

R. C. Kirkpatrick (2000) The evolution of human homosexual behavior. Current Anthropology 41, 385413.

W. Leutenegger & J. T. Kelly (1977) Relationship of sexual dimorphism in canine size and body size to social, behavioral, and ecological correlates in anthropoid primates. Primates 18, 117136.

A. S. Miller & J. P. Hoffmann (1995) Risk and religion: an explanation of gender differences in religiosity. Journal for the Scientific Study of Religion 34, 6375.

A. S. Miller & R. Stark (2002) Gender and religiousness: can socialization explanations be saved? American Journal of Sociology 107, 13991423.

F. Muscarella (2000) The evolution of homoerotic behavior in humans. Journal of Homosexuality 40, 5177.

Q. Rahman , S. Abrahams & G. D. Wilson (2003) Sexual-orientation-related differences in verbal fluency. Neuropsychology 17, 240246.

R. Y. Shapiro & H. Mahajan (1986) Gender differences in policy preferences: a summary of trends from the 1960s to the 1980s. Public Opinion Quarterly 50, 4261.

D. Symons (1990) Adaptiveness and adaptation. Ethology and Sociobiology 11, 427444.

R. Trivers (2000) The elements of a scientific theory of self-deception. Annals of New York Academy of Sciences of the USA 907, 114131.

G. E. Tuttle & R. C. Pillard (1991) Sexual orientation and cognitive abilities. Archives of Sexual Behavior 20, 307318.

J. Weinrich (1978) Nonreproduction, homosexuality, transsexualism, and intelligence. Journal of Homosexuality 3, 275290.

D. Wirls (1986) Reinterpreting the gender gap. Public Opinion Quarterly 50, 316330.

L. M. Wolfle (1980) The enduring effects of education on verbal skills. Sociology of Education 53, 104114.

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Journal of Biosocial Science
  • ISSN: 0021-9320
  • EISSN: 1469-7599
  • URL: /core/journals/journal-of-biosocial-science
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