Let's think for a second.
Would such a world benefit mankind? Would it destabilize the current geo-economics? Is there even a remote possibility that we as humans let go of this ancient tradition of drawing lines on sand that have only served to create problems among masses and has done NOTHING good so far?
There is possibility. And I think it will happen somewhere in the future. It's also natural to happen because we are inventing faster and faster ways of transport. (faster trains, planes) We are crossing some travel barriers, and by that and by internet people are connecting more and more. We all must remember that we are earthlings in first place
