Yes, it would be cataclysmic. In the longer term though, I would argue that just about everyone on the planet would be a winner if the US empire were finally put down. You can’t really overstate how much of an impediment the US is to global human welfare and development.
okay, but the US is kiiiinda terrible, but if the US loses here then china/russia/iran win…
so its not like the US just goes away; the US is replaced by full autocratic
Uhhhh. Are you aware of just how happy the people of China are with their government? Harvard conducted a 15-year research project and found 95% of China approved of their government. I would LOVE to live in a place where we all felt like the government was actually doing we wanted to.
And to call it autocratic is just ridiculous. Autocracy is a very specific form of government. Every state you mentioned is a literal Republic.