This is an interesting point, but I disagree that it has been around forever. I'd posit this is elementary of the state. But the state emerged not so long ago in an otherwise massive tract of history. And as to globalism, that's only somewhat correct. There are pieces of antiquity found all throughout the world, indicative of huge trade networks. Feathers from South America found on the East Coast of North America and artifacts of the Indus Valley people found in Western Europe. The speed at which that happens is, I don't think, particularly relevant. Even once in possession of such information the consequences are seldom manifest immediately. It's as much about maintaining the status quo and hierarchical stability as it is the process of civil evolution.

And it's easy to explain why: the more similar people are the more predictable and thus more controllable they become. Anyone in a position of power would love it if every word spoken was agreed upon and acted out as if their imagination was manifest. If every element of a given state was mechanistic rather than organic. Of course businesses are little states in their own way.

An interesting [unsourced] aside: I remember some comedian talking about their comeup, and that once they had what they wanted they became depressed. Telling the same jokes to different crowds and getting the same laughs over and over again. Peering into how easily people can be won, manipulated... I think it was Birbiglia. Be careful what you wish for, I guess.