"The Army, of course. It's a shell defense, and most of our troops are overseas, killing brown people, and they force us to pay for it, but it stops them, yup yup, it sure does."
I already explained to you (in another thread), that the fighting overseas is mostly about our government's failure to address economical issues, and I provided you with reading material on that subject in various other threads. Your "fantasy-world" will be run rampant with abuse of the environment, just as it is today by corporations. I asked you to learn about ecological economics and steady state growth, which you have ignored.
I do not maintain that we live in an ideal world. Far from it. However, I do believe that your world is worse, and won't last anyway, because it's human nature that humans will gravitate towards those who seem to be accumulating power - thus your NAP laws will evolve into various versions of SSOLWADNNAP.
Hence, governments will form in different regions.