There's also a problem with grouping individuals into races. What happens when a certain race has a higher IQ in the US than in another country? What about mixe

There's also a problem with grouping individuals into races. What happens when a certain race has a higher IQ in the US than in another country? What about mixed races? How do we group them? Wikipedia has a long article that dives into all these points: https://en.wikipedia.org/wiki/Race_and_intelligence https://en.wikipedia.org/wiki/Race_and_intelligence > The racial groups studied in the United States and Europe are not necessarily representative samples for populations in other parts of the world. Cultural differences may also factor in IQ test performance and outcomes. Therefore, results in the United States and Europe do not necessarily correlate to results in other populations. > Most people have an ancestry from different geographic regions, particularly African Americans typically have ancestors from both Africa and Europe, with, on average, 20% of their genome inherited from European ancestors. If racial IQ gaps have a partially genetic basis, one might expect blacks with a higher degree of European ancestry to score higher on IQ tests than blacks with less European ancestry, because the genes inherited from European ancestors would likely include some genes with a positive effect on IQ. Geneticist Alan Templeton has argued that an experiment based on the Mendelian "common garden" design where specimens with different hybrid compositions are subjected to the same environmental influences, would be the only way to definitively show a causal relation between genes and IQ. Summarizing the findings of admixture studies, he concludes that it has shown no significant correlation between any cognitive and the degree of African or European ancestry.