Leif Wenar is chair of Philosophy and Law at King's College London. He earned his degrees in Philosophy from Stanford and Harvard, where he worked with John Rawls and Robert Nozick. He has been a visiting professor at Princeton and a fellow of the Carnegie Council Program in Justice and the World Economy. This spring he will be William H. Bonsall visiting professor at Stanford. Leif Wenar’s new book is Blood Oil: Tyrants, Violence.