Revised question: Your country in 3D no longer exists when Earth goes 4D ?

[Questioner]

That makes sense. One minor point: one actually can sometimes start a new country where the old country was, but it usually requires great conflict. For example, the U.S. revolutionaries did it, and the French made it a habit for a while. I imagine that in 4D+, leaving the original country would be more peaceful for that, like the way Canada became an independent country without a revolutionary war.