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 'The Rule of Law in Inter-national Relations: Contestation despite Diffusion - Diffusion through Contestation', was delivered at the Lauterpacht Centre on Friday 27th January 2017 by Antje Wiener, Professor of Political Science and Global Governance at Hamburg University.