Gregory Messenger

University of Liverpool

Gastprofessor, Dr.


Dr. Messenger joined Liverpool Law School as a Lecturer in 2015. He was previously Junior Research Fellow in Law at the Queen's College, Oxford where he also completed his BCL and DPhil degrees. He has previously taught public international law, world trade law, and international investment law at the Universities of Oxford and Durham as well as courses on English law at the University of Granada.

Dr. Messenger’s research examines conceptual issues arising from the development and application of international economic law. His research interests are principally in world trade law, trade and public health, sustainable development and trade (including fisheries subsidies), the regulation of commodities, and theoretical approaches to international law broadly conceived.

He is currently a Member on the ILA Committee on Sustainable Development and the Green Economy in International Trade Law. Under its mandate, the Committee seeks to 'analyse and study how far the rules-based international trading system (including but not limited to the WTO trading system) supports open, fair and development friendly trade, which is both socially inclusive and environmentally sustainable, and to formulate proposals for strengthening the international trading system as an enabling environment for sustainable development and a green economy.'

Dr. Messenger is involved in public outreach and knowledge exchange activities on trade related aspects of the UK's withdrawal from the United Kingdom. He is also actively involved with the work of the Law and Non-Communicable Diseases Unit, examining the role of world trade law in efforts to regulate sugar and other potentially harmful primary goods. This entails research and training missions for the Law & NCD Unit and the World Health Organization.

In summer term 2018 he held a lecture about 030459 Law of the World Trade Organization (14-18 May 2018) in the framework of the Elective Field of Spezialization "Law of International Relations".

This course examines the institutions and law of the World Trade Organization. As a lynchpin of the global economic system, the WTO is a key institution in international law: Its rules impact on a wide
range of areas, from industrial strategy to health policy, and can be enforced though a comparatively effective dispute settlement system. This course encourages critical analysis of these rules and how they function in their legal and political context.
During the course students will be introduced to: the WTO’s decision-making and dispute settlement systems; the core obligations of WTO law relating to both tariff and non-tariff barriers to trade; the regulation of technical barriers to trade and measures designed to protect human, animal, or plant life; the regulation of subsidies; the use of trade defence instruments; and the place of WTO law within the international legal order, identifying its relationship with human rights, public health, and the environment.
This course is delivered through mixed sessions: a combination of lectures and group exercises where practical and theoretical challenges are discussed and debated in class.