Still making my way through What I Saw in America, in my odd bits of reading time.
In the chapter entitled "Wells and the World State", Chesterton addresses the folly of the fashionable notion, then being put forth by H. G. Wells and many others, that the world ought to be united under a single government. In so doing, he neatly explains the problems with the European Union... back in 1921.
Along the way, he offers this tidbit, which seems especially topical now, nearly a century later:
To make all politics cosmopolitan is to create an aristocracy of globe-trotters.