Sinky: "My kingdom is not of this world."
Just because His Kingdom is not "OF" this world, does not mean, of course, that it is not "IN" this world.
Nice try, Sinky. But Christ definitely established His kingdom (the Church) IN this world. It is just not "OF" this world, because "this world" is Satan's abode.
So, you advocate the Pope as earthly ruler? The Papal States were a stellar example of why Popes are spiritual rulers.