Seems to be quite a lot going on. Well, blame Jones, I suppose. Wikipedia:

The World Jones Made is set in the year 2002 AD. On a then-future post-apocalyptic Earth, there was a devastating conflict that involved the use of atomic weapons. Many American cities were targeted, and the People's Republic of China (and Soviet Union) also collapsed, leading to the imposition of a Federal World Government (Fedgov).

That seems unlikely to happen, doesn't it? But that's what we thought would happen, we young sci-fi consumers. Everything collapses and this naturally leads to the imposition of world government, when the opposite is the least likely outcome.