I'm intrigued by opinions that should not be expressed - questions that should not be asked.
If I said, "New Zealanders are smarter than Australians", you might conclude I'm a New Zealander looking for a bite. You'd be right. But if I say, "whites are smarter than blacks", there'd be trouble. Why? I think there are two reasons. One is that a history of exploitation makes this no laughing matter. A belief in white superiority has been used to justify many atrocities.
The second reason, and the more interesting to me is that people are afraid that it might be believed.
Can one ethnic race be superior to another in anything? Let's say we select the five fastest women from a great nation of 1 billion. Pit them against the fastest women from a tiny island nation of 250,000. Who would you put your money on? The large nation is India, the small is Barbados. My money is safe on the five from Barbados.
I'm always amused by the refusal of athletic commentators to acknowledge the glaringly obvious. The 100 metre finalists are black! Their ethnic origin is west central Africa. They may be from Canada, the USA, the Caribbean, but their genes are not. Sure there's an occasional white finalist pumped up on Romanian steroids, but that only highlights the point!
I think that the average black is no faster than the average white. (I love these clumsy generalisations.) Well, maybe on average slightly faster, but not so that you'd notice. I don't think you'd notice the difference until you get to the elite. That's where the tiny difference shows up. Once you've selected the very fastest men and women on the planet, they are black.
My first trip to Kenya taught me lesson. As I stepped out into Nairobi I was surprised to see that Kenyans are fat and thin, tall and short, just like English people. Half of them looked like they wouldn't make it around the block (just like New Zealanders). Unknowingly, in the back of my mind was expecting a nation of long-distance runners. "Ah", the locals told me, "the runners all come from that region...", pointing vaguely into the distant mountains. The best up there are among the best in the world.
If one ethnic group has the edge in sprinting, another for endurance running, then can an ethnic race produce better thinkers? Ability to think is not on a linear scale like sprinting. But outstanding thinkers do... well... stand out.