[quote=@Hillan]
<Snipped quote by Blue Demon>

Exactly. So there must have been a change in regime, just like how the world must have fixed the environmental issues, food and water by the end of this century.
Either that, or they did nothing of it, and the reason America fell is because they simply were out of resources, civil strife and conflicts within their own borders. Like second American Civil War-levels of conflict.[/quote]

Sounds good to me. 

A tanking China would wreck everyone's economy though. Which could only work if America never quite recovered from it. Which is completely possible in that sort of scenario. Which would also lead to America being more easily defeated.

A win-win then.

[sub]EDIT: And that was a lot of 'which's. Hahaha. It's too early to brain.[/sub]