On the individual level, higher intelligence has a protective effect against fatal car accidents, but does the same hold true when comparing populations?

It appears yes: national IQ correlates at r = -0.7 with country-level road-traffic death rates. MENA nations only:

Is 'mansplaining' actually necessary?
It may well be, as women know much less than men in almost every domain. This is especially true for finance, the general factor of knowing about things, and science-related knowledge.

Evidently, men are not mansplaining enough: You may be wondering "what's going on with factor 4?", and so did I. However, it ceases to be mysterious once you realize that factor 4 does not load at all on the second order general factor, and was also uncorrelated with factors 1 through 3. And look at the subtest loadings!

🪡🧵@jensenjeans recently used more data to refine national IQ estimates.
Here are the revised averages with 95% confidence intervals: Subsaharan-Africa (continental and islands):

This is not controlling for IQ. In a meta-analysis they found the openness–income association was largely, but not entirely, mediated by IQ.

Independent of intelligence, conscientiousness and extraversion are the strongest predictors of income:

https://twitter.com/UBERSOY1/status/1942746416473862325

The confidence intervals for the adjusted effect sizes are inferred. Here is the table from the paper:

if this makes you happy you’re part of the problem.

https://twitter.com/eigenrobot/status/1938573846698738095

tbf ‘the problem’ is chiefly genetic, so it’d be more apt to say that if this (in the context of us living in a dysgenic hellscape) doesn’t remind you of how sick and degenerate civilisation is now, your sexual disgust response has been mutated out of you

Values are heritable.🧵
The belief that ethics and values differ (both within and between populations) because of parenting, 'culture', or school indoctrination is widespread.
That genetics account for much of this variation, less so.

1. Moral beliefs aren't equally heritable: Some of this is due to some moral questions being more emotionally charged than others; how you feel about abortion is more genetic than how you feel about capitalism.

2. Visceral convictions (intuitive beliefs) tend to be more genetic regardless of the question being asked:

🧵on why these intuitions are wrong.

the association between ses and general honesty is entirely mediated by iq. independent of genetic intelligence, ses has zero predictive power.

surprisingly, being black still predicts dishonesty even in models that take iq into account:

https://twitter.com/JamesTate121/status/1935881158794838111

a swedish study found that iq still predicts violent offending rates between siblings, and controlling for ses variables in half brothers reared apart did not decrease the effect size.

so to ‘lessen crime’ you can’t just eliminate poverty — you need to increase intelligence.

are women genociding sensitive young men?

working with some fertility odds ratios for trait openness (a decent proxy for aesthetic sensitivity) from a study i was just reading, they appear to be a dying breed: the paper found a linear decrease in men’s fertility ORs per sd increase in openness across cohorts over time, with no indication of the trend slowing or reversing.

as β = ln(OR), we can derive a regression equation and compute E[β | Y = Yg] where g is a given generation.

🚨🧵
DO NOT let modernity gaslight you on the LQ (lard question). the claim lower bmis being more attractive is because of unattainable, ‘cultural’ beauty standards is environmentalist cope.

the default hypothesis: lower bmi signals fertility + genetic fitness.

guess what? t.co/NrPPOSUPIK


so what’s classed as ‘underweight’ (<18.5) isn’t associated with lower fertility or higher infant mortality. in fact, quite the opposite seems true. what about signs of fitness? intelligence is inversely associated with bmi: