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Darwin Correspondence Project

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Sexual selection in Commentary
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Darwin in letters, 1868: Studying sex

Summary

The quantity of Darwin’s correspondence increased dramatically in 1868 due largely to his ever-widening research on human evolution and sexual selection.Darwin’s theory of sexual selection as applied to human descent led him to investigate aspects of the…

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  • …   On 6 March 1868, Darwin wrote to the entomologist and accountant John Jenner Weir, ‘If …

Darwin in letters, 1867: A civilised dispute

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Charles Darwin’s major achievement in 1867 was the completion of his large work, The variation of animals and plants under domestication (Variation). The importance of Darwin’s network of correspondents becomes vividly apparent in his work on expression in…

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  • …   Charles Darwin’s major achievement in 1867 was the completion of his large work,  The …

Sexual selection

Summary

Although natural selection could explain the differences between species, Darwin realised that (other than in the reproductive organs themselves) it could not explain the often marked differences between the males and females of the same species.  So what…

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  • … Although natural selection could explain the differences  between  species, Darwin realised that …