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"These results suggest that the shift towards more lucrative foraging strategies may have been a key event in body size and SSD evolution in crab spiders". I think widespread, lucrative foraging pushes humans into scramble (vs. contest) competition, too. onlinelibrary.wiley.com/doi/pdf/10.100…

This study is now published in E&HB. Open access for 50 days with this link: Strength, mating success, and immune and nutritional costs in a population sample of US women and men: A registered report: authors.elsevier.com/c/1kOak3tz496Y…

Hardly any sex differences when in perspective (the last panel), but strong possible life course effect. (To the extent it is not cohort effect.)

AI aggression capability demonstrated. OpenAI is downregulating it, but with the latest home AI server (and more so with the ones that will follow), anyone will be able to train a private aibot gang. Social dominance in humans, an inherited behaviour, is about to be hacked

Falling fertility started much earlier, in a women’s rights spiral (see #GenderedSpecies), but once it is low, strong interaction with couple formation. Causality direction is implied here, but far from obvious.

We have several different types of inherited dyadic social behaviours (romantic, kin, female best friend, friend, competitor). Dr. Justin Mogilski, what is the evolutionary predecessor of parasociality? What is a bonobo or chimp parasocial dyad? What is a forager one?

An important moment, even though the fall in fertility is likely to be a temporary phenomenon on centuries’ scale

Exactly this. Perfectly put

Not getting vaccinated is like not having a phone password code.

There used to be a rock to hammer against another rock, chiseled into a shape to smash bones and cut wooden tools. We learned this from our parents and taught it to our kids, no change in our lives. Our imagination worked in stories and songs, not physical object. Not any more.

Have you ever wondered how social networks differ by gender? Check out my team's new dataset, which uses Facebook data to measure regional differences in social networks by gender all across the world! A 🧵 with examples, a description of our methodology, and a download link:

"In a monogamous world, there are close to no incels." This claim needs evidence. What's the best evidence that incels disappear with more monogamy? Alternative prediction: "In social groups that encourage good faith cooperation between men/women, there are close to no incels."

How delightful

Individualism alters love perception Super impressive paper, with consequences for individual well-being and social network microstructure.

AI use case: bringing Wolfgang back! Amazing! .

convo with Superior Machine ChatGPT 4.5 about sad little API-based AI, living without memory: "Q: What's the difference between me and an API-based AI? A: I can think, remember, and Google—it's just autocomplete with amnesia." cyberbullying has a brand new meaning :)))

One of the many new fertility charts now provided by Our World in Data

A billion words, three theories, one test: What predicts the most cultural differences in China? 🏇 🧵 nature.com/articles/s4159…

Important thread that shows how ecology can drive technology and technology drives social norms. Similar to the #GenderedSpecies argument.