This week on The Marketplace of Ideas, a conversation with David Friedman, professor of law at Santa Clara University and author of the classic work of 20th-century political philosophy The Machinery of Freedom. In his new book, Future Imperfect: Technology and Freedom in an Uncertain World, Friedman explores the law, the economics and the very sensory experience of a host of possible futures through the technologies likely to shape them, including universal surveillance, e-cash, designer kids, advanced encryption and nanotechnology.

The Marketplace of Ideas airs every Tuesday morning at 8am.