Every single day, the problems in America show us why nation-states function better.
America is a nation-state though?
A nation state is a state intended to serve as the homeland of a particular ethnic group or collection of ethnic groups.
Germans, Italians, Swedes, etc. are ethnic groups. ''Americans'' are not. That's the fundamental difference between America and the countries of Europe.And a lot of people would say that is what makes our country and the ideals it was founded on better than those nations states. Just sayin'.