From all data of IQ test, academic performance, intellectual achievement, career success, and comparison of complexity level of societies in the history, Africans under-performed Europeans and Asians in average so far. This is a fact and there is no need to deny it.
Africans appear to have some advantage in sport over Caucasian and in particular over Asians. Black athletes dominate in basketball, American football, field and track, and boxing although blacks are less successful in swimming and ski. Ski is a more expensive sport (expense for ski can exceed $100 per person per day in US), which may not be affordable for many black families. I believe that blacks have genetic advantage although there is some social factor in the amplification of this advantage.
In the art of music, blacks representation is disproportional in pop music. However, in the orchestra of classical music in America, there are more Caucasians and Asian. There are less black composers, conductors, violinists, and pianists comparing to black pop stars. So, I am not sure about music talents of blacks. Maybe, blacks have better talent in vocal and intuition but weaker in the field that requires more intensive and long term training.
Although as a group, Africans have under-performed over Caucasian and Asian so far in intellectual works, this does not constitute a reason to discriminate people of African origin. Followings are my arguments:
1) There are significant overlaps between the intelligence distributions of different racial groups. There are intelligent people from any racial groups. So it is better to treat people on individual base rather than on racial group. I found that less educated and less successful individuals have higher tendency to brag their racial pride. I was once told by a janitor that he is a proud white man. Obviously, he personally has nothing to be proud of, so he has to use his race and gender to brag himself. Well, some people call this type of people as white trash.
2) Human intelligence could evolve faster under certain environmental condition than we have thought. Although IQ score is significantly affected by environmental factor, most psychologists and I believe that it is also affected by genetic factor. However, it is not clear how fast the environment can transfer to genetics. Greek was one most intelligent people in the world, but current average Greek IQ score in not too high. Similarly, people from Egypt, Iraq and other Middle East countries where human civilization started first, have relatively lower IQ scores at present. Anglo-Saxons were probably considered as barbarian before 5th century. Maybe after a few hundred years, the average intelligence of Africans can match or even surpass Caucasians and Asians
3) There are competition and meritocracy in human society. However, human society is not purely Darwinian, at least in modern time. One of the great virtues of mankind is willing to help the weaker people. If it is indeed true that Africans have genetic disadvantage in average intelligence, it is responsibility of the stronger groups to help them since Africans also belong to human race and they might even share the same ancestors with Caucasians and Asians if the current mainstream anthropology theory is correct.