Murray Rothbard took Mises's price theory and drove it to a destination Mises never reached. Mises built the case that central planning fails because socialist planners cannot perform rational economic calculation without real market prices. Prices carry information that no committee can replicate. Rothbard accepted every word of this and asked the obvious follow-up: if state intervention distorts prices and destroys coordination, why stop your critique at the water's edge? Why exempt the state itself from the logic? The answer required property rights. Rothbard grounded everything in self-ownership. You own your body. By extension, you own what you mix your labor with, provided you homestead it from a prior unowned state. Every other right flows from this. Taxation is the seizure of your property under threat of imprisonment. From that foundation, Rothbard constructed anarcho-capitalism systematically, not as a utopian dream but as the logical terminus of taking rights seriously. Defense, arbitration, contract enforcement: private firms supply all of it in a competitive market. His 1973 book "For a New Liberty" laid this out with unflinching precision. His 1982 "The Ethics of Liberty" supplied the philosophical scaffolding. What Rothbard accomplished was a fusion, not a compromise. Mises gave him the economic engine. Locke and Lysander Spooner supplied the moral chassis. The result was a system where aggression has no legitimate institutional home, including Congress, including the Federal Reserve, including every bureaucrat drawing a salary your paycheck funded involuntarily.