To do that you need to break international law by declaring the treaties signed in the past null and void. You also need to break international law by refusing to negotiate with nations who never signed treaties, and want deals at least as good as nations who signed treaties.

There’s a very good reason why what you’re proposing is not what’s happening: it’s because you’re dealing with nation to nation negotiations, and the other nations want nothing of fairness and equality. They want their full rights, and denying them that is turning back the clock decades.