There are some immutable laws of nature, like gravity or the rotation of the earth. Or that weird smell in Terminal C at LaGuardia. But how nations organize themselves is not one of them. Empires rise, and empires fall. Sometimes civil wars cleave nations in two. Sometimes multiple nations join together. It varies.
Our country came about because there was commonality of purpose. As much as Jefferson and Hamilton couldn’t stand each other, they hated being ruled by the British even more. The rules and rights they devised still give us a common purpose today—but there’s no law of nature that says that those principles can only apply if we remain as one. (Read)