“Law and the State are both conceptually and historically separable, and law would develop in an anarchistic market society without any form of State. Specifically, the concrete form of anarchist legal institutions–judges, arbitrators, procedural methods for resolving disputes, etc.–would indeed grow by a market invisible-hand process, while the basic Law Code (requiring that no one invade any one else’s person and property) would have to be agreed upon by all the judicial agencies, just as all the competing judges once agreed to apply and extend the basic principles of the customary or common law.”

–Murray N. Rothbard, The Ethics of Liberty