If Jamaica does better than USA in track and field they must be doing something right, but what do you mean by generalizing to "black countries"? There might b

If Jamaica does better than USA in track and field they must be doing something right, but what do you mean by generalizing to "black countries"? There might be a bias towards track and field programs and careers in poor/small countries, thanks to cheap infrastructure and sustainability with very few athletes, and expensive sports that are practically reserved for relatively privileged people, e.g. swimming and horse riding, but confusing an athlete's race and their available opportunities is silly.