New study: Intelligence and Group Differences in Preference for Breasts over Buttocks

George Francis and I have a new exciting study out, the formal and finalized version of George Francis' 2022 blogpost: Francis, G., & Kirkegaard, E. O. W. (2023). Intelligence and…

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Preferences can be sick: mental illness from an evolutionary perspective

In the continuing debate about mental illness, we have roughly the following situation: Bryan Caplan representing the Thomas Szasz camp Scott Alexander representing the pragmatist "define mental illness in a…

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Cold winters theory: a summary of the evidence and replies to objections

Cold winters theory gets at bad name, even from fellow hereditarians. In fact, the article about it was deleted from Wikipedia too. In my opinion that's because they are not…

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New paper out: Europeans Have Larger Testes than Sub-Saharan Africans but Lower Testosterone Levels

Together with Ed Dutton and Helmuth Nyborg: Dutton, E., Nyborg, H., & Kirkegaard, E. O. W. (2022). Europeans Have Larger Testes than Sub-Saharan Africans but Lower Testosterone Levels. Mankind Quarterly,…

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East Asian ability tilt and ideographic written language

https://twitter.com/whyvert/status/1392623731835506691 I have not, but Lynn has noted that East Asians have a relative advantage in visual-spatial ability, and that's their written language, possibly some gene-culture co-evolution. One study shows…

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