He is an academic economist with a doctorate in physics who has spent the past twenty-two years teaching at a law school. His first book, The Machinery of Freedom: Guide to a Radical Capitalism, was published in 1973 and includes a description of how a society with property rights and without government might function. Throughout his works, he offers a consequentialist defense of libertarianism.
One recent non-fiction book, Future Imperfect: Technology and Freedom in an Uncertain World, examines the implications of a variety of technological revolutions that might happen over the next few decades. His latest book is Legal Systems Very Different from Ours, covers systems from Periclean Athens through modern Amish and Romany societies, including some in where law enforcement was private and decentralized.
He is also the author of two novels, and, with his wife, has self-published a medieval and renaissance cookbook, and a book related to their hobby of historical recreation.