Recently, after giving a broadcast on Charles Darwin, I received through the post a pamphlet, ‘Why are there “Gays” at all? Why hasn’t evolution eliminated “Gayness” millions of years ago?’, by Don Smith. The pamphlet points to a genuine problem; the prevalence of sexually ambiguous behaviour in our species is not understood, and is certainly not something that would be predicted from Darwinian theory. Smith’s motive for writing the pamphlet was as follows. He believes that the persecution of gays has been strengthened and justified by the existence of a theory of evolution which asserts that gays are of low fitness because they do not reproduce their kind. He also believes that gays can only be protected from future persecution if it can be shown that they have played an essential and creative role in evolution.
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