Be that as it may, it is also an imparitive thing to discuss. Facinating thing about human genetic variation is that if you take any trait, running for instance, while a genetic advantage may be present in some populations, the person with the greatest genetic advantage could be beaten by one with the greatest genetic disadvantage. (not counting genetic lameness or profound deformity here, just things like lung capacity, stride length etc.) that being said, the people with the genetic disadvantage are less likely to persue excelence in running because the effort exerted yields comparatively little payoff in the field.