David D. Friedman
David Director Friedman 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 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).
David Friedman is the son of economists Rose and Milton Friedman. He graduated magna cum laude from Harvard University in 1965, with a bachelor's degree in chemistry and physics. He later earned a master's (1967) and a Ph.D. (1971) in theoretical physics from the University of Chicago. Despite his later career, he never took a class for credit in either economics or law. He is currently a professor of law at Santa Clara University.