Enkidu Warrior
Ultramagnetic
These parts:
As long as religion and racial divisions exist, nations will exist. In other words, nations will always exist. Not just racial and religious, but all other kinds of divisions. Language, ideological differences, etcetera. Also, dictators don't willingly give up power for the sake of the people. So if you got a dictatorship, you got a nation.
If you've wasted enough of your life on this forum like I have, you will have seen plenty of American citizens who think war is a great means to accomplish goals. Also, there are plenty users on this forum that support tyrants and oppression.
Now that's just plain crazy. It's not going to happen. Cooperation for limited resources is crazy talk. Nations fight to take resources for themselves. On the individual level, people exploit resources for their own benefit. This also seems like the Prisoner's Dilemma. To put it simply, if everyone cooperated, then everyone gets a small benefit. If one guy decides to not cooperate, he can get a great benefit for himself and everyone else is hurt. I think I got it right.
John Bolton is basically the human incarnation of every generic Hollywood movie villain. You all know his stance on the UN. He also said, "Only one nation should be allowed to have nuclear weapons." Imagine guys like him cooperating for limited resources. Nope. Not gonna happen. (Cue the morons who will defend John Bolton with endless nitpicking.)
I'm not as pessimistic as you, though probably not that far off. Such a future will certainly be impossible if even the people who believe in its virtue dismiss it as fanciful. I think it's important to know what you want before you start making bargains for what you can realistically achieve, and in that spirit at least this document does have relevance. It is after all a set of principles rather than a program of government, and all principles tend to be tempered by what is possible. Even if we never rid the world of nations, wars and John Boltons, the world would still be a better place for having people committed to these Humanistic aims. There's a big difference between actually ending competition over limited resources and acting pragmatically with this goal as a guiding principle (by which I don't mean ignoring it while paying it lip service).