Quote from achilles28:
It's obvious real anatomical differences exist between races. The brain and it's wiring is as much a part of our biology as the number of fast twitch muscle fibers or the size of the male penis. According to IQ and Wealth of Nations, by nationality, South East Asians are top of the food chain. However, by ethnicity, I would argue Jews are the most intelligent, with honorable mention going to Northern Europeans. Specifically, Germans. This centuries revolutionary breakthroughs were spawned mostly from Germanic minds, many of which were Jewish - guided rocketry, the jet engine, theory of relativity, atomic weapons/power, space flight.
That said, I think Africans underscore, in part, due to lack of basic education and nutritional deficiencies. Raise a European like a ferrel child then test them. The outcome is predictable. Also, culture plays a huge role in shaping personality - enriching or destructive values, habits and behaviors. Mainstream North American black culture has basically gone to hell. But it's only done so recently. In the 50's and 60's, blacks were notably upright, moral, well-spoken and valued formal education. As an entire nation, American culture has degenerated remarkably since then. Black culture, even more so.