William Twining is Emeritus Quain Professor of Jurisprudence of University College London and an established and eminent figure in the field of legal theory. He is widely published with Cambridge University Press and has been a co-editor of the Law in Context series since its inception in 1965. Other recent publications include Rethinking Evidence (Cambridge, 2006), Human Rights, Southern Voices (Cambridge, 2009), General Jurisprudence (Cambridge, 2009) How to Do Things with Rules (with David Miers, Cambridge, 2010) and Karl Llewellyn and the Realist Movement (2nd edition, Cambridge, 2012).