History also definitely shows that nepotistic or race-centered systems really did not work out fine. In fact the malinged systems made by rich white people were nepotistic and race-centered.

What history does show us is that systems that reward effort, and not just someone's heritage are the ones that have led to best outcomes.

Does history show things working out better when other groups make rules?

I don't think that was the point of the person you are resounding to. I think the point was that no single group should make all the rules.

Racism is bad and you should feel bad that you judge people based on their skin color.