North-East-Asians have highest average IQ in the world, even in the USA they usually outperform all other ethnic groups including whites. Most likely it is genetical and not cultural thing. In Africa populations usually have a bit lower average IQ which explains slower pace of development, anyway there is a lot talent in Africa too and many countries are doing somewhat good nowdays. Africa might be one day be as modern than Europe or USA. Huge potential in Africa. This have nothing to do with races/racism - just population in general, if you take 20 million smartest Africans and put them to one country it will be the most advanced country in the world.China, Japan, South Korea, Hong Kong ("special administrative region"), Singapore, Vietnam (developing now).