Richard Allen Posner is currently a judge on the United States Court of Appeals for the Seventh Circuit. He is one of the most influential living legal theorists and a major voice in the law and economics movement, which he helped start while a professor at the University of Chicago Law School. He currently serves as a lecturer at the Law School.

Posner is the author of nearly 40 books on jurisprudence, legal philosophy, and several other topics, including The Problems of Jurisprudence; Sex and Reason; Overcoming Law; Law, Pragmatism and Democracy; and The Problematics of Moral and Legal Theory.