Overwhelming evidence of recent evolution in West Eurasians
David Reich's team has a new kickass preprint out: Akbari, A., Barton, A. R., Gazal, S., Li, Z., Kariminejad, M., Perry, A., ... & Reich, D. (2024). Pervasive findings of…
Sexual maturation and intelligence, Rushton not vindicated
A reader sent me Seb Jensen's blogpost about nerds, which includes the following: People in the Terman’s study of the gifted were more likely to be tall, broad-shouldered, have matured…
Rushton vindicated again: developmental speed vs. intelligence
A few days ago, geneticist Shai Carmi posted a new study on Twitter. And then he deleted his tweet and reposted a "I disavow" version. Well, what happened is that…
What do ancient genomes show about recent human evolution?
Davide Piffer and I have a new study out: Piffer, D., & Kirkegaard, E. O. W. (2024). Evolutionary Trends of Polygenic Scores in European Populations From the Paleolithic to Modern…
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…
Taking the human extended phenotypes seriously
Back in 1982 Richard Dawkins wrote a book called The Extended Phenotype, which argued that the "phenotype should not be limited to biological processes such as protein biosynthesis or tissue…
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…
What are the race differences in sexual behavior?
Suppose you wanted to know about race differences in sexual behavior, how would you find out? Well, you could ask people, and if self-reports are accurate and don't have some…
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…
The origins of cold winters theory
Richard Lynn famously spent a few decades collecting data on human intelligence around the world. Eventually, he was able to generate world maps of average intelligence levels by nations and…
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