The collapse of large nations is a Good Thing for the working class majority: the elite always want large nations, especially large nations with lots of racial, cultural and language divisions. That makes it easier for the elite to control the nation. It's called the 'divide et impera' strategy. That was the founding principle of the USA (see the letter from madison from jefferson wherein madison writes that the divide et impera (divide and rule) tactic is the way to rule america (madison was worth 100 mill in today's dollars when he got his inheritance; jefferson, almost the same)).
When the elite can no longer hold large, divided nations together via violence and or propaganda, the working class majority form smaller, more homogeneous, less divided nations, nations that can be more easily controlled by the workers, and less easily controlled by the elite.
Factions are the friend of the rich and the enemy of the masses.
How do the elite create factions so they can rule? Enlarge the nation; import foreigners, especially those of another race and culture; create propaganda that focuses on identity politics; etc etc.
Of course the centrally controlled dogma of the american edu-propaganda system has programmed us to feel bad about collapse of nations. Oh, it's so sad that such and such nation is breaking up.
But that is an elite-centric propaganda meme. It is always a good thing when nations collapse and fall apart--a good thing from the perspective of the working class majority. Of course the more "educated" you are, the more you take the perspective of the elite--in general.