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Prof Marc Weller

Prof Marc Weller

Professor of International Law and International Constitutional Studies

University Teaching Officer

Hughes Hall

Office Phone: 01223 767 238


Marc Weller is Professor of International Law and International Constitutional Studies in the Department of Politics, University of Cambridge. He holds Doctorates in International Law and International Relations, in Law, and in Political and Social Sciences from the Universities of Cambridge, Frankfurt and Hamburg. He is a barrister (Middle Temple) and Associate Tenant at Dougthy Street Chambers, a fully qualified and accredited meditator and a Fellow of the Chartered Institute of Arbitrators. His teaching focuses on public international law and the law of international organizations, in particular the United Nations.

Professor Weller joined the Faculty of Law of the University of Cambridge in 1990 and served as Deputy Director of the Centre of International Studies from 1997-2000. From 2000-2009 he was the Director of the European Centre for Minority Issues. In that role he directed headquarters operations and a growing field staff active in numerous projects addressing governance and inter-ethnic relations in South Eastern Europe and the Caucasus region. He developed the profile and portfolio of activities of the Centre, raising in excess of Euro 15 million for its activities from governments and other institutions. At the Centre, he guided and conducted conflict settlement activities involving Georgia, Moldova (Transdnistria), Bosnia and Herzegovina, Macedonia and Kosovo and served as mediator addressing the Moldova-Gagauzia autonomy dispute. He has also repeatedly served as expert and facilitator for the Council of Europe.

In 2000, Professor Weller founded the Cambridge-Carnegie project on the Settlement of Self-determination Disputes. He has led this initiative since then, raising close to USD 2 million for its implementation. In addition to its academic outputs, the project has resulted in an international network of experts supporting ethnic peace-making around the world. In 2011, he launched a major international research activity in cooperation with the United Nations Secretariat relating to peace-making and peace agreements which has also attracted significant funding. Similarly, he is heading a major international project on transitions in international law, also conducted in cooperation with the United Nations.

Professor Weller served as legal advisor during the 1999 Rambouillet Conference on Kosovo and senior legal advisor for Kosovo in the UN-led Vienna process of Final Status Negotiations between Kosovo and Serbia of 2006/7. Moreover, he was a senior expert for the African Union in relation to the North-South Sudan pre-referendum negotiations of 2009/10.

During 2011/12 he served as Senior Mediation Expert in the Department of Political Affairs of the United Nations Secretariat in New York. In that role, he advised on the transitions in Cote d’Ivoire, Egypt, Yemen and Libya, on the Doha Peace Process for Darfur and on the stabilization of Somalia. Subsequently, he served as a legal advisor to the UN and League of Arab States Joint Special Envoy for Syria, Kofi Annan. He remains Senior Consultant to the UN Special Advisor on Yemen, Jamal Benomar and serves as Senior Mediation Expert for Lakhdar Brahimi, the Joint Special Representative of the UN Secretary-General for Syria..

Professor Weller has served as Counsel in major international litigation, including in the International Court of Justice, and as expert in national legal proceedings. He remains an active member of the United Nations Mediation Roster and is a member of the UK Stabilization Unit (FCO, DFID and MoD) cadre of Deployable Civilian Experts.

Professor Weller has been Director of Studies at the Hague Academy for International Law and Visiting Professor in the University of Paris and at other institutions. He is the author, editor or co-editor of some 25 major books and a large number of academic journal articles and book chapters. 

Key Publications

  • Marc Weller and Jessie Hohmann, eds., Commentary on the UN Declaration on Indigenous Rights, Oxford University Press, forthcoming 2014.
  • Marc Weller, ed., Handbook on the Use of Force in International Law, Oxford University Press, forthcoming 2013, 1375 pages.
  • Marc Weller, ed., (Katherine Nobbs, Assistant Editor), Political Participation of Minorities, Oxford University Press, 2010, 855 pages.
  • Marc Weller, Iraq and the Use of Force in International Law, Oxford University Press, 2010, 285 pages.
  • Marc Weller and Katherine Nobbs, eds., Asymmetrical State Design as a Tool of Ethnopolitical Conflict Settlement, Pennsylvania University Press, 2010, 320 pages.
  • Marc Weller, Contested Statehood: Kosovo’s Struggle for Independence, Oxford University Press, 2009, 328 pages, also published in translation as Shtetesia e kuntestuar, Koha Publishing House, 2009.
  • Marc Weller, Escaping the Self-determination Trap, Martinus Nijhoff Publishers, 2008, 224 pages.
  • Marc Weller, Negotiating Statehood: The Vienna Negotiations on Kosovo, Chaillot Paper No. 114, European Union Institute for Security Studies, 2008, 95 pages.
  • Marc Weller, Denika Blacklock and Katherine Nobbs, eds, The Protection of Minorities in the Wider Europe, Palgrave, Macmillan, 2008, 296 pages.
  • Marc Weller and Stefan Wolff, eds., Institutions for the Management of Ethnopolitical Conflict in Eastern and Central Europe, Council of Europe Press, 2008, 274 pages.
  • Marc Weller, Peace Lost: Missed Opportunities for Conflict Prevention in Kosovo, Martinus Nijhoff Publishers, 2008, 230 pages.
  • Marc Weller and Barbara Metzger, eds., Settling Self-determination Conflicts, Nijhoff Publishers, 2008, 768 pages.
  • Marc Weller, ed., Universal Minority Rights, A Commentary on the Jurisprudence of International Court and Treaty Bodies, Oxford University Press, 2007, 524 pages.
  • Marc Weller and Stefan Wolff, eds., Internationalized State-building after Violent Conflict: Dayton after Ten Years, Routledge, 2007, 108 pages.
  • Marc Weller, ed., The Rights of Minorities: Commentary on the European Framework Convention for the Protection of National Minorities, Oxford University Press,  2005, 688 pages, paperback edition 2006.
  • Marc Weller and Alexander H. E. Morawa, eds., Mechanisms for the Implementation of Minority Rights, Council of Europe Press, 2005, 264 pages.
  • Marc Weller and Stefan Wolff, authors and eds., Autonomy, Self-Governance and Conflict Resolution, Routledge, 2005, 320 pages.
  • Marc Weller and Jorn Kuehl, authors and eds., Minority Governance in Action, Danish University Press, 2005, 350 pages.
  • Marc Weller, The Kosovo Conflict: The Conduct and Termination of Hostilities and the Renewed Search for a Settlement,  Documents & Analysis Publishing, 2001, 504 pages.
  • Marc Weller, The Crisis in Kosovo 1989-1999, Documents & Analysis Publishing, 1st ed., 1999, 2nd ed., 2001, 504 pages.
  • Daniel Bethlehem and Marc Weller, The Yugoslav Crisis in International Law: General Issues, Cambridge University Press, 1997, 711 pages.
  • Marc Weller, Regional Peace-keeping and International Enforcement: The Liberian Crisis, Cambridge University Press, 1994, 465 pages.
  • Marc Weller, Iraq and Kuwait: The Hostilities and their Aftermath, Cambridge University Press, 1993, 750 pages.
  • Marc Weller, Democracy and Politics in Burma, Craftsman Press, 1993, 453 pages.
  • Daniel Bethlehem, Christopher Greenwood, Elihu Lauterpacht and Marc Weller, The Kuwait Crisis: Basic Documents, Cambridge University Press, 1991, 330 pages.