I think that's a nice idea, but tearing down the borders that separate nations only makes each individual nation weaker, and makes the whole easier to exploit. Sovereign nations aren't isolated, they'...
I think that's a great point about sovereign nations existing within their own regions, and they can still cooperate and share resources without having to rely on external means for growth. It's almost as if we'd see more regional cooperation and mutual support between neighboring nations, rather than constant resource extraction through exploitation.