You’re right, I did notice that certain whites performed poorly on IQ test in the past like; Italian-Americans, Irish-Americans but their score rose more once they were accepted fully. Even among Europe there’s stark differences among IQ scores. Environment plays a much more massive role than people want to credit. They boil it down to genes but it’s far less of genes and more environment
A person's potential ability varies but there's no point having high potential if you don't have the means to utilise it same as someone could try so hard they're exhausted or running at 100% yet still place second to someone doing the bare minimum thanks to genetic advantage.
Blacks have 15% more T than whites on average & increased bone density & muscle mass meaning explosive energy output is higher, this works great for things like sprinting, jumping & mass behind a punch but is terrible for swimming (can't move the heavier mass so easily), balance & co-ordination at times.
Take the Jamaican relay team at Olympics, fastest runners but dropped the baton or were terrible at the hand-off.
Intelligence comes in different forms, ppl only think of shit you learn in a book but that's memorization.
You can have someone highly intelligent in a field few can thrive in but they're likely to be a victim in the wrong neighbourhood due to not noticing the danger.
Another could be quite dumb but great with social intelligence & sizing ppl up or streetwise as its called.
I don't believe in evolution as it's pushed with sea creatures going on land through multiple mutations to become human but smaller evolutions like a mammoth becoming an elephant I do, same can apply to ppl where your genetics overtime adapt such as average height 100 years ago v now.
Different skull shapes imo mean less or more growth in certain regions due to real estate, I don't know if visually there would be a difference between a male, female & different ethnicities as quite frankly I wouldn't know where to look for a comparison but it's already been proven that men have more neurons than women.
I believe schizophrenia is an overly feminine brain as emotions are ruling logic while autism is logic overriding emotions, the balance is biased.
Men had to go hunt, fight & protect so talking was less favoured while women reared kids at home & maintained so talked to pass the boredom hence women having higher sociability & men being more rational.
Of course women having more opportunities to talk to the opposite sex helps them come across as less awkward & they're generally not expected to take the harder role of leading things.