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 agression, whaling, children and military tribunals, and theories and practices for proving individual responsibility criminal responsibility for genocide and crimes against humanity. This lecture, entitled 'Why does the Right of Self-Determination have Internal and External Aspects', was delivered at the Lauterpacht Centre on Friday 28th October 2011 by Dr James Summers, Lecturer in Law, University of Lancaster. For more information about the series, please see the LCIL website at www.lcil.cam.ac.uk