But power in practice does not adhere to how different parties arbitrarily define where borders lie.
Most of nations of the world officially define Crimea to be within the Ukrainian border, but it is the Russian government who wields the actual, practical power there.
It took a rather long time for many countries to stop defining mainland China as falling within the power of the R.O.C. government, despite the R.O.C. wielding no practical power there any more, and the R.O.C. still defines mainland China as falling within it's power.
If “borders” of nations were defined descriptively based on sovereign entities having control over them, then they would certainly be more useful, but, this would also assume a simplified world where it is easy to decide what powerbase is sovereign, and what powerbase binarily has control over what surface of the planet; it is often not so simple and often multiple parties vie for control over a single area, and whether a powerbase be sovereign is not so easy to simply answer.
If the law is observed broken once, that is a falsification of the entire theory.
And I assume you live in a rather peaceful area if you think powers adheres to borders. In many parts of the world governments have a harm time enforcing their law upon fringe areas where effective anarchy is quite common. — the picture is certainly not as simple as you paint it.
Most of nations of the world officially define Crimea to be within the Ukrainian border, but it is the Russian government who wields the actual, practical power there.
It took a rather long time for many countries to stop defining mainland China as falling within the power of the R.O.C. government, despite the R.O.C. wielding no practical power there any more, and the R.O.C. still defines mainland China as falling within it's power.
If “borders” of nations were defined descriptively based on sovereign entities having control over them, then they would certainly be more useful, but, this would also assume a simplified world where it is easy to decide what powerbase is sovereign, and what powerbase binarily has control over what surface of the planet; it is often not so simple and often multiple parties vie for control over a single area, and whether a powerbase be sovereign is not so easy to simply answer.