Neil Walker holds the Regius Chair of Public Law and the Law of Nature and Nations at the University of Edinburgh. Previously he taught public law at Edinburgh for ten years (1986-96), was Professor of Legal and Constitutional Theory at the University of Aberdeen (1996-2000), and, most recently, was Professor of European Law at the European University Institute in Florence (2000-2008), where he was also the first Dean of Studies (2002-5). He has also held various visiting appointments, including at the University of Tilburg, Netherlands, University of Columbia, University of Cornell, University of Toronto, New York University and, most recently, Yale University. Professor Walker’s main area of expertise is constitutional theory. He has published extensively on the constitutional dimension of legal order at sub-state, state, supranational and international levels. He has also published at length on the relationship between security, legal order and political community. He maintains a more general interest in broader questions of legal theory as well as in various substantive dimensions of UK and EU public law. His most recent book is Intimations of Global Law (2015). He is a Fellow of the British Academy, and also a Fellow of the Royal Society of Edinburgh.