As the world moves increasingly toward identitarian nationalisms, countries that display a commitment to being multi-ethnic, multi-religious republics with no legally privileged racial or religious classes will have an advantage.
I hope the United States can stay on this trajectory.
Advantage in what way? All I see is more potential for infighting, unclear hierarchies, less ability to stay on a sensible course. A republic based purely on merit is (I think) better than one guided by privilege, but by being multi-ethnic you are not by definition less privilege-based or more likely to succeed
