In his numinous and magical novel Cat's Cradle, Kurt Vonnegut introduced the idea of "granfalloons". These are random groupings of people who think, erroneously, that they have some shared destiny as a group, and for whom this delusion is a source of suffering and misguided action. Examples, famously, are given, thus:
Other examples of granfalloons are the Communist Party, the Daughters of the American Revolution, the General Electric Company, the International Association of Oddfellows - and any nation, anytime, anywhere.
I think of this statement, which has become a sort of mantra to me over the nearly 40 years since I read Cat's Cradle, literally every time I pass through an airport, see a reference to immigration or international trade, and about the half the time I am watching, listening to or reading the news. Especially when I read about things like this.