and "world political authority" isn't necessarily synonymous with "world government," at least as the latter is popularly construed.
That said, any halfwit can see that sooner or later global government will be established. It's been attempted repeatedly throughout history. It has never been more imminent than now, the day when weapons of mass destruction, instaneous communication, near instantaneous travel, instantaneous capital formation, legacy stockpiles of weapons, highly trained militaries, and breakdown of social order in the West are manifest.
In fact, the high level of interaction in legal and commercial matters argues that in some senses, it already has. Would you have it not be so? If you think the market forces that push globalization, much less the unholy ambitions of men, can be tamed with legal structures you need to familiarize yourself with black markets. The Holy Father addresses this fact squarely, and argues for the very same thing he would argue for at any level of social development: truth in love for the human person.
Perhaps your disagreement with him is such you think he shouldn't address the realities of modern life, but he does, just like he's supposed to.
The problem is technology at the disposal of fallen human nature; the problem is not the Holy Father's diagnosis and prescription.
But why does the leader of the Roman Catholic Church have to codedly attempt to advance the NWO?
...he would argue for at any level of social development: truth in love for the human person.
Here we go again. What exacly does that mean in respect to the topic of this discussion? It's just more jumbled newspeak that would suggest we are our brothers' caretakers.
Our Savior didn't select Peter to continue His Church on earth so that a successor 20 or more centuries down the line would decide, for his flock as well as what's left of the Christian world, that socialism is a good thing!
Socialists, communists have a rough time earning their way into Paradise! That's what world government is all about.