The Lauterpacht Centre for International Law (LCIL), University of Cambridge hosts a regular Friday lunchtime lecture series on key areas of International Law. Previous subjects have included UN peacekeeping operations, the advisory jurisdiction of the International Court of Justice, the crime of aggression, whaling, children and military tribunals, and theories and practices for proving individual responsibility criminal responsibility for genocide and crimes against humanity. This lecture, entitled 'Epistemic Communities in International Law', was delivered at the Lauterpacht Centre on Thursday 11th February 2016 by Andrea Bianchi, Professor of International Law at the Graduate Institute in Geneva, Dickson Poon Visiting Professor, King’s College London; and Visiting Professor, Faculty of Law, University of Vienna. For more information about the series, please see the LCIL website at http://www.lcil.cam.ac.uk/