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Small-Scale Question Sunday for January 22, 2023

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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This is all pretty fair. I've included it on a whim but looking again it's weak, despite citing interesting literature. Retracted, thanks.

We don't have a solid way to talk about anything like Flynn effect in pre-modernity and pre-testing periods; and how 1900's Europeans would've scored on modern tests is not interesting. Personally I'm on the fence regarding the timeline of the current ranking emerging: there probably has «never» been parity between Europeans and Sub-Saharan Africans, but it is plausible that Europeans have been gaining in their advantage in historical time, and so this gap is not explained solely by cold winters or some other factor present for many millenia. On the other hand, cold winters theory seems to explain the pattern of the center of civilization moving up latitudes historically: it's as if building a complex society in the South is playing on easy mode, but then the society hits a limit, and novel technologies flow northward, enabling another round. Today, the most advanced nations in the East and West are indeed populated by people who have passed through the cold winter filter.

My reason for including it was: Breeder's equation, IQ heritability and net fertility differentials allow for meaningful (~0,5 SD) eugenic and dysgenic shifts on the scale of a few centuries, so arguments along the lines of "there wasn't enough time for X" are invalid. It's all speculative until we get good decent IQ PGS for different populations and test that ancient DNA, but I think it's likely that many civilizations have gone through a eugenic phase and subsequent dysgenic collapse, and as you say, Egyptian artisans may have been selected for IQ just like Europeans. This is bog standard cyclical history theory.

I think using genes is a dubious reason to explain why in a class based society, the rich upper class were able to be better off or more numerous in future generations then the poor generations.

Clark, in his oeuvre, demonstrates fertility more directly than by rates of family names going extinct, and his evidence from modern era Japan, China etc. does corroborate that upper classes have innate quality separate from class advantage.