Imagine if you didn't have to have a citizenship to any country in particular, and that you could obtain a citizenship to the world. These days the people who lead countries are so afraid of everyone, even their own people, so much so, that almost everyone is confined to the area they were born for their entire lifetime. Imagine if you could have a document that stated that you ally with no one, that you belong to the planet alone. Something that would allow you to roam freely and indulge in all the cultures of the world, and not be looked upon as though you're something freshly scrapped off the bottom of a shoe. If you could travel to the most war torn countries, and be looked at only with admiration, and the thought that, "there is a man who harbors no ill will towards anyone, a thing of beauty." Or, even if you traveled to the most beautiful places on Earth, and were looked at as a simple person, and bring a smile to the viewers face because they see your existence as a beautiful thing in itself, the fact that you're alive is a miracle to them... To only be known as a soul that wants life to move forward for the better of everyone.
Now imagine if every person on this planet had a citizenship to the world... Where would those war torn countries be? Where would be considered the most beautiful places on Earth?
...What could humanity achieve then?