Category: Human Behavior and Cognitive Science

Q: Curt: “Why would class size say something about average IQ?”

A group’s IQ is an average of the IQ of the individuals in the group. All groups demonstrate a somewhat normal distribution (bell curve) of IQ around that average – varying only in the width or narrowness of that distribution..
The class distribution is the result of the capacity to bear responsibility over time in the face of complexity. Which in turn is the result of genetic load (retention of neoteny and accumulation of mutational load (defects)).
This is why there is so little rotation between the classes over many centuries. The difference between group averages is represenative of the retention (success or failure of selection for or against anti-neoteny and mutational load).
The ‘general’ direction of all human evolution is neoteny which like wolves vs dogs, sacrifices impulsivity and aggression for agency (patience, thinking) and preservation of adaptive cooperation common in all young animals.
And this appears to have occurred in about four speciation events beginning in east africa, then the dry persian gulf, then in the cold tibetan steppe, then in europe, and lastly in perhaps the Ob river region in today’s Russia, but certainly between there and lake Bikal, 20k years ago (where blonde hair came from).
This yielded the four primary races (species) by their adaptation to the contients and latitudes: African, South Eurasian, European, and Asian and the hybrids of them given human adaptation that is also expressed as reproductive plasticity (males will have sex with anything from a sheep, to a monkey, to hole in a tree).
And the variation between races is largely neotenic evolution on one hand and preservation of the lower classes and their genetic load due to climate on the other.
So, while reducing the size of the lower classes (smaller cranium, lower iq, lower conscientiousness, lower self regulation) will improve the average gentics of any group, the relative number of people above the ‘smart fraction’ (~125) will remain constant. as such less evolved races would shrink, and some of them shrink dramatically which is why they won’t do it, and it won’t happen.)
And while the races are species by any other measure the meaning of species among humans is lessened because of human reproductive adaptability – even though all humans demonstrate an ingroup preference mediated by neotenic preference.

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