All empires , nation states collapse, my friend. Japan as a national entity is over 3,000 years old, however, in that 3,000 years we were not always unified, and were under various names, kingoms, many rulers ascended the throne. The same applies for great historical empire-states such as Egypt, Persia, Indus Valley, Indian Subcontinent, Chinese mainland, The Middle East, Europe, Africa.
We are simply living in a particular time epoch. We only see what has happened thus far, and are limited in scope because we don't know the future. However, if history teaches us one thing, there is an end to everything. No empire, no nation state ever resisted total collapse.
America is not immune to this. She may not collapse any time soon, but, according to historical chronology, she , too, will endure the unendurable.
Like all great empires that have come and gone....
