There are differences in average intelligence between groups, but not in the way I think you're claiming. First of all, the IQ delta between Jews in the US and other white people has collapsed since 1960, and the overrepresentation of Jews in highschool and college level academic competitions has also collapsed. This isn't due to Jews becoming less intelligent on average but rather the average white child becoming more intelligent thanks to the Flynn effect[1]. And you're grouping all white people together, but back in the day all the poor subsistence farmers immigrating from Ireland and Italy and Eastern Europe had IQs in the 80s too. Of course, their children born and raised in US cities had roughly the same IQs as other white people. And during the cold war the IQs of the people in West Germany pulled more than 10 points ahead of the people in East Germany, but with reunification IQs have converged again.
All of which is to say, we have strong evidence of differences in IQ between groups, but we have pretty much no evidence of genetic IQ differences between groups. We know that environmental factors[2] play a huge role in population level IQ and are quite sufficient to explain the differences we can observe. Could one group have a genetic advantage? Sure, but I don't feel I have any reason to believe it's white people who are naturally smarter than black people as opposed to vice versa.
[1]https://en.wikipedia.org/wiki/Flynn_effect
[2]Well, there's vitamin D deficiency but that's so easily fixed by nutrition that I'm calling it an environmental factor despite the role genetics plays.
Thank you. I didn't go into these points in my post for fear of covering too much ground, but you have written them up well. Lead, nutrition, and environment are all big factors.
All of which is to say, we have strong evidence of differences in IQ between groups, but we have pretty much no evidence of genetic IQ differences between groups. We know that environmental factors[2] play a huge role in population level IQ and are quite sufficient to explain the differences we can observe. Could one group have a genetic advantage? Sure, but I don't feel I have any reason to believe it's white people who are naturally smarter than black people as opposed to vice versa.
[1]https://en.wikipedia.org/wiki/Flynn_effect [2]Well, there's vitamin D deficiency but that's so easily fixed by nutrition that I'm calling it an environmental factor despite the role genetics plays.