The problem with this perspective is that for each scale you measure people (e.g. how fast they can swim) a different set of traits contribute (e.g. shoulder wi

The problem with this perspective is that for each scale you measure people (e.g. how fast they can swim) a different set of traits contribute (e.g. shoulder width, torso to height ratio). This means that you don't have a set of super humans that extraordinary at everything, but that for any arbitrary scale, the group with higher variance will tend to be over represented at the extremes.