Controlling for age, race, sex, education, family income, religion, current and past marital status and number of children, more intelligent people are more likely to prefer instrumental music than less-intelligent people. A 2019 Croatian study confirmed these findings, showing that people with lower intelligence preferred music with lyrics, rather than complex orchestrations. 467 teenagers performed a non-verbal intelligence test and were then asked to rank musical genres in order or preference. Those who recorded the highest IQ scores displayed a clear preference for instrumental music. On the other extreme, preference for rap music is significantly negatively correlated with intelligence.
I had a teacher at school many years ago a slightly barmy but amusing and pleasant teacher to whose name we all attached the prefix SAS (there were persistent rumours of his military service and he once beat up and dragged two would-be robbers to the constabulary). In my class he casually remarked that blacks and whites produce different pheromones and exhibit different reactions thereto, so each group dislikes the other group’s aroma. Although, it would seem blacks are generally attracted to whites given the high incidence of black on white rape, and black outrage when whites move away from the ghetto.
In Warhammer 30k, there are planets of human beings who have developed substantial genetic mutations, some to the point of being deemed “mutants” and worthy of extermination. If humanity did indeed emerge from Africa, those who mutated white skin, light eyes & hair, intelligence, swimming, low time preference, higher IQ, whether through environmental pressures, divine action, or neanderthal admixture, are regarded as “mutants” from the gold standard of, well, this:

Diane Abbott, the Shadow Home Secretary.
At present, there is considerable pressure for the mutant to die out, and for humanity to return to its allegedly original form. It seems that the white mutant has a deleterious and dysgenic mutation, namely an almost total lack of in-group preference, and an intellectual sense of shame at having evolved beyond the ape; a sense of shame which has been amply exploited by race hustlers and of course a certain tribe who are genetically predisposed to schizophrenia and an instinctive hatred of the white mutant.