[Western] Intelligence tests do reveal large differences between European and sub-Saharan African nations
Case closed. The tests we designed cannot be questioned, so any assertion we make based on the data must be correct.
Of course, other tests and research contradicts this. And tests of people of African decent who have lived in Western nations for generations are far more in line with the socioeconomic ranges in standardized intelligence tests.
Turns out raising a baby with access to food, high quality healthcare, and parents that are native speakers of a western language tends to get you kindergartners that do pretty well on a Western intelligence test. Unless you're an arrogant dumb ass like Watson, this should not surprise you.
I've got no problem if there is real evidence of nature over nurture. But I'm a bit tired of having to tear through the tissue paper arguments presented on the topic. Obviously there is SOME contribution of nature. But even categorizing an individual's race by genetics is a bit problematic, because our current definitions have more to do with culture and nationality than with any solid boundary lines between what we might think of as race.
The whole topic is a pseudoscience, I'd put more faith in the bumps on my head because at least we can measure that.