There is a theory that it was those who left the comfortable, evolved for niche that had to face challenges that made higher intelligence a greater survival advantage, so those who left Africa and faced a variety of new environments to which they had to adapt culturally became smarter.
Hence the average IQ for blacks around 85 versus 100 for whites and 105 for Asians.
Also read that the higher IQs for Asians is for SE Asians that have emigrated to the west though I think Japan and S Korea have a highly educated population.
India, quite a bit of China and SW Asia not so much.
> Hence the average IQ for blacks around 85 versus 100 for whites and 105 for Asians.
Black IQ in Africa is about 70. Black IQ in America is 85. The 105 IQ for east Asians doesn’t factor in Chinese peasants which are pretty stupid by most accounts. So we don’t have an accurate measurement for east Asia, but it’s clearly pretty high. Highest IQ group in the world is Ashkenazi Jews with an average IQ 112. White IQ has been dropping and is sitting around 97-98 right now white some countries like Germany at 99 and some like Portugal and the Ukraine at 93.