Just as a side note, Europeans and Asians have a slice of Neanderthal DNA added to their genetic makeup from where the different migrations out of Africa met up and interbred. There is more of it in the people who migrated east so while it's a very small part of the genetic make up of those races, it's still there. Personally I think culture plays a much bigger part when it comes down to general intelligence and achievements of groups of people from different areas and regions of the world.