The distribution of IQ scores by gender is also a big one. To deny differences is race you would have to basically throw out the theory of evolution, I've seen many already calling to ban studies on differences in intelligence. China will take over the world if that happens because they will create superhumans with it.

If you want something really uncomfortable you should look into genetic heterozygosity and differentiation in humans.

https://lesacreduprintemps19.files.wordpress.com/2011/06/woo...