The reason to have more racial diversity on any team is because it's helpful to have different perspectives on any issue. And I also believe that. It's easier said than done, unfortunately.
This is what I find most magnetic about successful givers: they get to the top without cutting others down, finding ways of expanding the pie that benefit themselves and the people around them. Whereas success is zero-sum in a group of takers, in groups of givers, it may be true that the whole is greater than the sum of the parts.