[DontTellAnyone]

Because the data strongly suggests that racial differences in general intelligence exist and exist due to genetic differences between populations. This idea makes certain people almost foam at the mouth (I've witnessed this personally and I'm only barely exaggerating).

Stephen Hsu, former VP of research at MSU for example was recently "canceled" from his job because he stated - in a very milquetoast and reasonable way - that even though he's aware that this kind of thing has been used to oppress people in the past, studies (specifically genome wide association studies) suggest that racial differences in intelligence are real and largely due to underlying genetic differences and not just socio-economic factors.

[rjsw]

The genetic differences could be down to socio-economic factors though, such as some of your ancestors having been slaves and restricted in how they could choose a partner.

[viklove]

Evolution works on far, far longer timescales than you're suggesting.

[brnt]

Not really. It works on the timescale that specific causes are affecting the genepool. Europeans with below average immune systems were removed from the gene pool virtually overnight by the black death. Native Americans famously never had the 'benefit' of this event.

Similarly, there was an enormous selective pressure on Black slaves in the Americas, so it's certainly possible some effects took only a generation to be reflected in the gene pool.

However, when it comes to intelligence, no strong evidence exists saying it is genetically predetermined. Culture and rolemodel of parents are far greater determinants, implying selective pressure is unlikely to affect the general intelligence of a subgroup.