The relationship between IQ and distance from Africa is complex, and there are multiple factors that can influence IQ, including location, genetic distance, and latitude: Location Countries that are closer together geographically tend to have more similar IQs than countries that are farther apart. Genetic distance Genetic distance is a proxy for cultural distance, and is positively correlated with IQ differences. Latitude Latitude can influence cognitive ability, even in tropical climates. A study of seven regions in Sudan found a trend of lower IQs in the southern region, compared to the northern regions. Sub-Saharan Africa Some studies have found that the low IQ scores in Sub-Saharan African countries drive the correlation between national IQ and geographic distance. Evolutionary theories Some theories predict that people who settled farther away from the EEA evolved higher levels of intelligence. However, Sub-Saharan Africans are predicted to have lower general intelligence than people in Europe, Asia, and the Americas.
https://bbs.wenxuecity.com/memory/1441481.html
非常有名的书。这个结论，是根据全球各地的人的基因变异的层度做出来的。引进这个分析方法的人类学家，得了诺贝尔奖。这个不应该有争议。
达尔文认为人类智力完全可以用进化论来解释，偏高智力的个体对人与自然的交互过程中有较好的认知、适应、生存能力和性选择力，更具有遗传优势。服从进化论的东西，一定是在生存压力下选择出来的。比如欧洲犹太人就是因为被限制在从事商业、金融和其他非体力劳动密集型行业，再加上近亲结婚造成的高IQ。
下面的文章和谷歌查询也有一些类似结果。
https://www.researchgate.net/figure/Human-capital-IQ-and-genetic-distance-with-emphasis-on-continents_fig2_275463969
https://www.pnas.org/doi/full/10.1073/pnas.0507611102?doi=10.1073/pnas.0507611102
另外google 找的：
The relationship between IQ and distance from Africa is complex, and there are multiple factors that can influence IQ, including location, genetic distance, and latitude: Location Countries that are closer together geographically tend to have more similar IQs than countries that are farther apart. Genetic distance Genetic distance is a proxy for cultural distance, and is positively correlated with IQ differences. Latitude Latitude can influence cognitive ability, even in tropical climates. A study of seven regions in Sudan found a trend of lower IQs in the southern region, compared to the northern regions. Sub-Saharan Africa Some studies have found that the low IQ scores in Sub-Saharan African countries drive the correlation between national IQ and geographic distance. Evolutionary theories Some theories predict that people who settled farther away from the EEA evolved higher levels of intelligence. However, Sub-Saharan Africans are predicted to have lower general intelligence than people in Europe, Asia, and the Americas.