I do not take any valuation on this part because Ayn Rand had already settled that for me. If Ron Paul leans towards the founding fathers ("natural rights come from god or nature"), Rothbard takes them as an axiom (the central peice of Libertarian ideology.) That axiom is not rooted in reality, thus Rothbardians end up with unworkable fantasies (anarchism.) The fun part, btw, is that Herman Hoppe tried to prove that natural rights are results of reason. Rothbard himself agreed with Hopper after reading his arguments. Even more fun - both Rothbard and Hoppe did not mention Ayn Rand, at all.