In a world based on mutual respects instead of trading wars, there should be no point to redo everything again in every country. If one country is very good at doing something, why try to re-implement it again?
That doesn't exist though; politician use globalism to paint all negative stuff (immigration, inflation, wars, climate change, whatever), people (including them) start to believe in it and there we are. Every rich country/country group will need to implement everything (energy, military, tech, food, health, etc) themselves to sustain themselves and 'normally' drive trade to cut prices but at any moment be able to fold into itself again.
Well we're finding out right now aren't we. Funny enough the guy who had such the beautiful vision that humanity was meant for the stars is at the center of disproving his life's work and cementing that were doomed for domestic squabbles until the end.
