content: There are many people in the US who literally build their own light aircraft. They fly them in air shows, competitions, travel, etc. Not one or two, there are thousands of them. There are several magazines that cater to them, YouTube videos and thousands of books on the subject. They build planes that perform better than what is commercially available.  They do this in their own time, with their own money, for the fun of it. Yet in africa, where the roads are absolute shit and the distances make car travel so impractical that remote villages don't see people years on end the government can't even put together a basic bush plane for humanitarian aid, emergency medical services, surveying and wild life services or any of the hundreds of things they desperately need them for.  The discrepancy between white people and black people may be just 20 IQ points, but when the top 5% produce 95% of innovation the results are astronomical.