The modern dogma is that, uniquely among inherited characteristics, cognitive ability does not vary between different populations. The evidence for this belief is slender.
https://www.telegraph.co.uk/news/2020/12/15/black-applicants-significantly-likely-fail-raf-selection-tests/
https://pumpkinperson.com/2016/02/17/racial-differences-in-sat-scores/
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