Paul H. Robinson is the Colin S. Diver Professor of Law at the University of Pennsylvania, and is a leading expert on criminal law. Professor Robinson holds law degrees from U.C.L.A., Harvard, and Cambridge. He has served as a federal prosecutor, as counsel for the U.S. Senate Subcommittee on Criminal Law, and as one of the original commissioners of the U.S. Sentencing Commission. He is an editor of Criminal Law Conversations (Oxford 2009), and author of Distributive Principles of Criminal Law: Who Should Be Punished How Much? (Oxford 2008) and Law Without Justice: Why Criminal Law Doesn't Give People What They Deserve (Oxford 2005).