Here is a most recent Vatican document, during Pope Benedict XVI’s reign, discussing the need for such a universal public authority.
Even though I agree with all of these popes that such a world authority, working in the interest of the common good, would be a good thing, I have a problem with this because it’s kind of like saying, “We need a good and just king” or “We need a good and just government”. Who can disagree with that?
But, as we can see today, the several world powers are generally ambitious, corrupt, selfish, persecuting Christians, ALL OF THEM enforce abortion, some of them enforce sterilization.
Honestly, the only way I can see a unified world-wide public authority being good for mankind is if it’s
monarchical and chosen and ordained by the Popes, even answerable to the Popes, like the Holy Roman Empire originally was. Otherwise, I see no way that such authority would have the graces and moral direction necessary to govern the world justl
Why monarchical? Because Jesus said [Matt 7:13-14], “Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. For the gate is small and the way is narrow that leads to life, and
there are few who find it.”
Basically, most people are wrong and, therefore, democracy is inherently flawed. Also, in 2 Sam 23:3-4, we have “The God of Israel said, The Rock of Israel spoke to me, ‘He who rules over men righteously, Who rules in the fear of God, 4Is as the light of the morning when the sun rises, A morning without clouds, When the tender grass springs out of the earth, Through sunshine after rain.’”