[nazgulnarsil]

only in those traditional forms of governance that are semi-compulsory to one degree or another. free immigration between competing systems of governance allow each unit to have coherence of vision while still allowing people to choose freely about what sort of ideological vision they agree with.

This was a genius political invention. The result was called something like the "unified states", but it was destroyed in a civil war and lost to history. I hear books from that civilization survive, but no one reads them.