The ironic things is that we seem to recognize it and try and do this exactly in the places where it's not really needed: take the "European Federation" ideal, it probably wouldn't be a net plus since almost all European nations produce basically functional states and provide OK levels of individual freedom. Otoh something like a Middle-Eastern Federation and a Central Asian Federation could solve a ton issues and really be useful. A bunch of mega-states would surely improve lives of people in most of Africa too.
Dunno why we're so taboo ridden and afraid to be open-minded when it comes to geo-politics on a planetary scale, we're stuck with these two horrible ideas of (1) independent nation-states and (2) general-globalism, that are neither any good, and we're totally afraid to think outside the box...