Unlike the other societies you mentioned, the United States was born with a poison pill. Ever since the 1st slave ship arrived America’s been plagued with race issues that tear at the very fabric of its union.
Until the race hurdle has been cleared the United States will always be a society fighting to stay afloat while being tied to a brick.
The only new wrinkle is that a carpet bagger has skillfully used America’s inherited weakness as a political lever.
There will be damage to the Republic, but the lasting wound will of race may now never heal.