Indian average intelligence: not a mystery
Talking about the current thing on X often results in viral posts: The replies are full of hostility for a variety of reasons, one of them being that Taleb posted…
Bedsharing/cosleeping and SIDS
There is probably going to be a lot of baby-related science posting. You will have to forgive me. On the other hand, my own reader survey shows that the fertility…
Babymaxxing
And so the day came, August 12, our first child joined the world: Given how great early life interventions work, I started immediately with important topics like British history: Kidding…
Do you like dogs, cats, both, or neither?
Back in March I published this study of pet preferences and human psychology: Kirkegaard, E. O. (2025). Do You Like Dogs, Cats, Both, or Neither? An Examination of Western Dating…
Proper embryo selection just landed
Today is an exciting day. First, the HHS announced a more open data policy (in the direction of my suggestions), and second and more importantly, a new company just went…
Video: Davide Piffer and I talk about ancient genomics, polygenic scores and history
The first of many videos for paid subscribers (on Substack). Actually, this first one will be free, and some later ones may also be free (which I will also post…
Odd sibling RDR results: is the problem measurement error in IBD?
You've probably seen the recent Scott Alexander discussion about heritability, with comments from key players and commentators in the field, but if not: Scott Alexander: Missing Heritability: Much More Than…
Intelligence (journal) is dead, long live Intelligence (&CA) journal
As Noah Carl covered at Aporia in December 2024, the old Intelligence journal experienced a hostile takeover by Elsevier and their woke academic friends. As a result, most of the…
Book review: The Intelligence Men: Makers of the I.Q. Controversy (Fancher 1985)
I've been reading old writings recently, which is why I was posting about Terman's views. Some years ago, I heard about the book called The Intelligence Men: Makers of the…
Lewis Terman on human diversity and intelligence in 1922
I've been reading through some old papers and stumbled across an exchange between journalist Walter Lippmann and Lewis Terman in 1922 (original). Unfortunately, I wasn't fast enough to convert my…
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