Death God said:
True, but something similar might happen or something will wrong somewhere causing alliances to falter and burn out.
I'd rate the likelihood of the Chinese/USA alliance faltering at about the same as the Taliban turning themselves into US forces en masse and saying "we're tired of this war, you can have this land, it's like, no big deal, and by the way we hear Christianity is really cool, can you distribute some Bibles to the villages around here, thanks". I mean, it
could happen, I suppose, it's certainly within the realms of physical possibility... but realistically, it's not likely.