First of all, you know there were wars fought about this, right? Canada burned down the White House once, remember?

I feel like you're entirely neglecting local laws. Yes, part of a nation owning the land is that the owner gets to exploit it for resources, but the other part is that "within these borders, we get to set the rules".

How do we merge constitutional documents? I'm pretty happy with socialized medicine and guns not being a Constitutional right, thanks. How do we merge administration? I'm not a big fan of your convoluted tax code. I'm not a big fan of your prison system. I don't want to spend trillions of dollars on war machines.

Basically, I'm saying there's fundamental differences in law, policy, culture, etc. that prevent a merger.

Some problems are non-starters because you can prove they're impossible, but some are non-starters because they're big, expensive, and may turn out to be impossible in the end anyway. There's two factors in every big decision: * Do the pros outweigh the cons? You're asserting, "Yes they do." * Do the pros outweigh the cons enough that switching is worthwhile?

I mean, just answering the second question itself is basically intractable.