Rights are what you get if a bunch of rational, self-interested people get together and say, "What ought we be allowed to do without interference?"

There is a single, correct, rational answer to that: you ought to be allowed to do anything that doesn't initiate force against someone else. All rights are a function of that single fundamental observation.

Every rational, fully self-interested person (who has studied the topic a lot) will agree on this.

So that's where rights come from... they are a human construct, but there's also a single, objectively correct answer.

So they don't come from "Laws of Nature" or the Founding Fathers.