David Director Friedman (born February 12, 1945) is an American economist, physicist, legal scholar, and libertarian theorist. He is known for his writings in market anarchist theory, which is the subject of his most popular book, The Machinery of Freedom (1973, revised 1989 and 2014). He has authored several other books and articles, including Price Theory: An Intermediate Text (1986), Law's Order: What Economics Has to Do with Law and Why It Matters (2000), Hidden Order: The Economics of Everyday Life (1996), and Future Imperfect (2008).
In his book The Machinery of Freedom (1973), Friedman sketched a form of anarcho-capitalism where all goods and services including law itself can be produced by the free market. This differs from the version proposed by Murray Rothbard, where a legal code would first be consented to by the parties involved in setting up the anarcho-capitalist society. Friedman advocates an incrementalist approach to achieve anarcho-capitalism by gradual privatization of areas that government is involved in, ultimately privatizing law and order itself. In the book, he states his opposition to violent anarcho-capitalist revolution.
Friedman is a longtime member of the Society for Creative Anachronism, where he is known as Duke Cariadoc of the Bow. He is known throughout the worldwide society for his articles on the philosophy of recreationism and practical historical recreations, especially those relating to the medieval Middle East. His work is compiled in the popular Cariadoc's Miscellany. He is sometimes credited with founding the largest and longest-running SCA event, the Pennsic War; as king of the Middle Kingdom he challenged the East Kingdom, and later as king of the East accepted the challenge...and lost.
^"The Machinery of Freedom" (PDF). p. 124. Retrieved 25 November 2012. Much is made in libertarian circles of the division between 'Austrian' and 'Chicago' schools of economic theory, largely by people who understand neither. I am classified as 'Chicago'.