Large Language Models (LLMs) have the potential to transform public international lawyering. ChatGPT and similar LLMs can do so in at least five ways: (i) helping to identify the contents of international law; (ii) interpreting existing international law; (iii) formulating and drafting proposals for new legal instruments or negotiating positions; (iv) assessing the international legality of specific acts; and (v) collating and distilling large datasets for international courts, tribunals, and treaty bodies.
The article uses two case studies to show how LLMs may work in international legal practice. First, it uses LLMs to identify whether particular behavioral expectations rise to the level of customary international law. In doing so, it tests LLMs’ ability to identify persistent objectors and a more egalitarian collection of state practice, as well as their proclivity to produce orthogonal or inaccurate answers. Second, it explores how LLMs perform in producing draft treaty texts, ranging from a U.S.-China extradition treaty to a treaty banning the use of artificial intelligence in nuclear command and control systems.
Based on our analysis of the five potential functions and the two more detailed case studies, the article identifies four roles for LLMs in international law: as collaborator, confounder, creator, or corruptor. In some cases, LLMs will be collaborators, complementing existing international lawyering by drastically improving the scope and speed with which users can assemble and analyze materials and produce new texts. At the same time, without careful prompt engineering and curation of results, LLMs may generate confounding outcomes, leading international lawyers down inaccurate or ambiguous paths. This is particularly likely when LLMs fail to accurately explain or defend particular conclusions. Further, LLMs also hold surprising potential to help to create new law by offering inventive proposals for treaty language or negotiations.
Most importantly, we highlight the potential for LLMs to corrupt international law by fostering automation bias in users. That is, even where analog work by international lawyers would produce different results, LLM results may soon be perceived to accurately reflect the contents of international law. The implications of this potential are profound. LLMs could effectively realign the contents and contours of international law based on the datasets they employ. The widespread use of LLMs may even incentivize states and others to push their desired views into those datasets to corrupt LLM outputs. Such risks and rewards lead us to conclude with a call for further empirical and theoretical research on LLMs’ potential to assist, reshape, or redefine international legal practice and scholarship.
Tuesday, April 1, 2025
Deeks & Hollis: Large Language Models and International Law
Biddolph: Queering Governance and International Law: The Case of the International Criminal Tribunal for the Former Yugoslavia
International law is brought into existence by actors from a variety of perspectives--international lawyers, state representatives, bureaucrats, and organizations--and as such, international law is riddled with contradictions. It is violent and violating, reducing complex lives and histories to "good" (lawful) and "bad" (criminal) bodies subject to protection, praise, or punishment. And yet it has potential to be a means of hope, resistance, and justice for victims, survivors, and oppressed communities.
In Queering Governance and International Law, Caitlin Biddolph examines the international legal space through queer, feminist, and postcolonial lenses. In doing so, she queers governance and international law, exposing the gendered and sexualized meanings behind legal concepts like violence, and critiquing legal status quos so that more transformative, liberatory, and queerer paths to justice might be dreamt and manifested within and beyond international law. Using as a case study the International Criminal Tribunal for the former Yugoslavia (ICTY), Biddolph traces the cis-heteronormative underpinnings of legal violence, and identifies ways that violence can be resisted and international law subverted to dismantle the very gendered and racial hierarchies it has reinforced.
Symposium: The Juridification of Justice
Monday, March 31, 2025
Lieblich: The Death and Life of the Prohibition on Forcible Reprisals
That forcible reprisals between states are unlawful is taken for granted in contemporary international law. However, events in recent years have highlighted the resurgence of retaliatory force, challenging the foundational principles of the prohibition. This article seeks to uncover the normative assumptions underlying the prohibition on reprisals, demonstrate how these assumptions are challenged in the current international moment, and propose ways in which the prohibition can be revitalized.
In the pre-UN Charter era, forcible reprisals were considered lawful on the basis of three normative assumptions: that there was no "common judge" among sovereigns and thus self-help was justified; that self-defense and punishment were intertwined; and that international law was concerned with the rights of states rather than those of individuals. The UN Charter, in its prohibition on reprisals, sought precisely to counter these assumptions. However, as the article shows, international polarization and permissive doctrines on the use of force – in particular, those blurring the distinction between defense and punishment – have consistently eroded these foundations. The article exemplifies these erosive dynamics by focusing on the retaliatory cycle between Iran and Israel in 2024, situating it within the current moment of international polarization.
The article then proposes a normative framework to revitalize the prohibition. Chiefly, it offers a novel theoretical definition of reprisals as a form of opportunistic harm, one that cannot be justified even in the absence of a common judge. By doing so, the article acknowledges the fragmentation of the current global order while reaffirming the intrinsic wrong of reprisals even in turbulent international times.
Seminar: The European Union and international law in times of Trump II
Calls for Papers: IG Workshops – 2025 ESIL Annual Conference (Updated)
- IG on International Criminal Justice: Reconstructing International Criminal Justice as It Unfolds (deadline: April 1, 2025)
- IG on the International Law of Culture: The Future and Past of ‘Progress’ in Cultural Heritage Law (deadline: 4 April 2025)
- IG on Migration and Refugee Law: De/Re-Constructing Asylum: New Actors, Processes and Spaces (deadline: 11 April 2025)
- IG on Feminism and International Law: Feminist Visions for Reconstructing International Law (deadline: April 15, 2025)
- IG on International Business and Human Rights: Reconstructing International Law: Structural Shifts Under the UN Binding Treaty on Business and Human Rights (deadline: 15 April 2025)
- IG on International Environmental Law: Reconstructing International Environmental Law Through Adjudication (deadline: 20 April 2025)
- IG on International Human Rights Law: The Reconstruction of Victimhood in International Human Rights Law (deadline: 20 April 2025)
- IG on International Organizations: (Re-)constructing International Organizations in the Work of the United Nations International Law Commission (deadline: 20 April 2025)
- IG on Energy and International Law: Reconstructing International Energy Law in Times of Crisis (deadline: 25 April 2025)
- IG on International Health Law: Global Health Law under Pressure: Facing Acute and Chronic Challenges (deadline: 10 May 2025)
Sunday, March 30, 2025
Skordas & Mardikian: Research Handbook on the International Court of Justice
This Research Handbook presents an in-depth examination of the International Court of Justice (ICJ). Contributing authors dissect the global governance functions of the ICJ and its impact on national legal orders worldwide.
Incorporating a comprehensive analysis of the key functions of the ICJ, including the attainment of international peace and law-making, leading experts situate the jurisprudence of the Court in a broader theoretical framework. They identify its core judicial practices and delineate its interactions with international and supranational courts and tribunals such as the International Tribunal for the Law of the Sea, the Court of Justice of the European Union and the Inter-American Court of Human Rights. Ultimately, this Research Handbook interrogates the centrality, power and authority of the ICJ and encourages further research in the field.
New Issue: La Comunità Internazionale
- Articoli e Saggi
- Irini Papanicolopulu & Daniele Mandrioli, Combating Transnational Crime at Sea: The Unfinished Integration Between UNTOC and UNCLOS
- Giada Giacomini, Emanuele Fratto Rosi Grippaudo, Spectrum of Anthropocentric Approaches to the Ecological Continuum: Environmental Protection Effectiveness and Legal Standing in Italy’s New Constitutional Framework
- Marco Argentini, La nozione di “contratto internazionale di investimento” alla luce dei lavori del working group UNIDROIT-ICC: un’estensione applicativa del test Salini?
- Osservatorio Diritti Umani
- Michela Chianese, La confisca di beni culturali illecitamente acquisiti dinanzi alla Corte europea dei diritti dell’uomo: riflessioni a margine del caso dell’Atleta di Fano
- Osservatorio Europeo
- Andrea Maria Pelliconi, La decisione Fronte Polisario II della Corte di giustizia dell’Unione europea e il diritto all’autodeterminazione del popolo Sahrawi
- Note e Commenti
- Mariaida Cristarella Oristano, Ancora sul dialogo tra corti e il primato del diritto dell’Unione europea: la sentenza della Corte costituzionale n. 181 del 2024
Saturday, March 29, 2025
New Issue: International Journal of Refugee Law
The latest issue of the International Journal of Refugee Law (Vol. 36, no. 4, December 2024) is out. Contents include:- Mariana Ferolla Vallandro do Valle, Fleeing Deprivation: Deducing Non-Refoulement Obligations from Economic, Social and Cultural Rights
- Erna Bodström, A Matter of Individual Discretion: Facilitating Performative Credibility in Asylum Interviews
- Arjumand Bano Kazmi, Pakistan’s Judicial Engagement with International Refugee Law
- Özlem Gürakar Skribeland, The Turkish Council of State’s Engagement with International Refugee Law in Cases Involving ‘Non-European’ Refugees
Thursday, March 27, 2025
Arato: The Institutions of Exceptions
International economic law binds states’ hands in the interest of liberalizing markets in various ways, including cross border trade in goods and services (trade) and capital (investment). The treaty regimes for both trade and investment do this by disciplining states through legal rules, while preserving a modicum of governmental power over policy. Though not always recognized as such, the preservation of policy space in these regimes typically involves exceptions-style reasoning by adjudicators – formally in the case of most trade and some investment treaties, and informally in the investment treaty regime more generally. This "exceptions paradigm" of justification has worked well in the trade regime, where it has been especially key to securing a workable balance between market disciplines and regulatory policy space in the WTO/GATT context. But it has been less successful at striking a reasonable balance in the investment regime – irrespective of whether the paradigm has been formally codified in an exceptions clause. This Article seeks to explain why, by focusing on the institutions within which this mode of justification is embedded. Certain institutional differences between these regimes help explain the varied success of exceptionalism in trade and investment, in particular: the right of action (public vs private); the degree of judicial centralization (ad hoc arbitration vs court system); and the available remedies (retrospective compensation vs prospective injunctive relief). I argue that it is trade law’s public-oriented institutions that have made the exceptions clause workable – not the other way around. By contrast, investment law’s private-oriented institutions make that system particularly inhospitable to exceptions-style justification.
Conference: Cambridge International Law Journal 14th Annual Conference
Lecture: Mälksoo on “Russian and Soviet justifications of war and approaches to jus ad bellum: from the Great Nordic War (1700-1721) to Ukraine in 2022”
Call for Papers: Asian Cities and the International Legal Order
Tuesday, March 25, 2025
New Issue: European Journal of International Law
The latest issue of the European Journal of International Law (Vol. 35, no. 4, November 2024) is out. Contents include:- Editorial
- Editorial: EJIL: News!; In This Issue; In This Issue – Reviews; EJIL Role of Honour; EJIL Peer Review Prize; Are We Missing Your Peer Review?; On My Way Out – Advice to Early Career Scholars VIII: Best Practice for Workshopping Projected Edited Collections (Books, Symposia) in 10 Not So Easy Steps; My Patria Is The Book: 10 Good Reads 2024
- EJIL Interview
- Sarah M H Nouwen & Joseph H H Weiler, ‘On my way out … for real!’ A Conversation with Joseph H.H. Weiler on the Occasion of His Stepping Down as EJIL Editor in Chief
- Articles
- Radha Ivory, The Concept of International Law Reform and the Case of Negotiated Settlements in Foreign Bribery Matters
- Andreas Buser, Exercising Planetary Jurisdiction: On the Legality and Legitimacy of Unilaterally Mitigating Planetary Ecological Footprints
- Jedidiah J Kroncke & Haimo Li, The Global Scope of Competitive Legalities in the Early 19th-Century South China Sea: The Topaz Incident
- Roaming Charges
- Places with a Soul: A Darkening World
- Book Review Symposium: International Law and Techology
- Dimitri Van Den Meerssche, International Law and Technology as a Critical Project: A Collective Reading
- Abhimanyu George Jain, In/visibilities
- Marie Petersmann, Refusing Algorithmic Recognition
- Christine Schwöbel-Patel, In the Service of Keeping Capital Moving
- André Dao, A Historiography of Amnesia: Beyond Data, Big Tech and the (Re)Turn to Human Rights
- Angelina Fisher, From In(-)formation to Infrastructural Turns: The Digital Futures of Human Rights Law and Practice
- Review Essay
- Vladyslav Lanovoy, Due Diligence in International Law: A Useful Renaissance or ‘All Things to All People’?
- Book Reviews
- Renske Vos, reviewing Deval Desai. Expert Ignorance: The Law and Politics of Rule of Law Reform
- Silvia Steininger, reviewing Laurence Burgorgue-Larsen, The 3 Regional Human Rights Courts in Context: Justice That Cannot Be Taken for Granted
- Book Review Symposium: The Hague Academy
- Phattharaphong Saengkrai, A Transcivilizational Perspective at the Hague Academy: A Critical Review
- Mario J A Oyarzábal, The Hague Academy of International Law and Latin America
- Rodolfo Ribeiro C Marques, Contestation, Emulation, Reformation: Latin American Legal Thought at the Hague Academy of International Law
- Justina Uriburu, Windows to Worlds: Eduardo Jiménez de Aréchaga’s Teachings at the Hague Academy
- The Last Page
- Thus Spoke JHH Weiler
Monday, March 24, 2025
Call for Papers: Annual Postgraduate Conference in International Law and Human Rights
Sunday, March 23, 2025
Workshop: EU Accession to the ECHR: Procedural Hurdles and Prospects Before the ECtHR
Saturday, March 22, 2025
Call for Panel Proposals: International Law Weekend 2025
The American Branch of the International Law Association has issued a call for panel proposals for International Law Weekend 2025, which will take place in New York City on October 23-25. The theme is "Crisis as Catalyst in International Law." The call is here. The deadline is April 20, 2025.
Friday, March 21, 2025
New Issue: International Criminal Law Review
The latest issue of the International Criminal Law Review (Vol. 25, no. 1, 2025) is out. Contents include:- Matthew Gillett, Georgia Moloney, & Anne-Lise Chaber, Proving Ecocide: The Plight of Pangolins as a Case Study for Fusing Ecological Science with International Law
- Linda Mushoriwa & Windell Nortje, A Failure by African States or a Gap in the Law? An Appraisal of the African and International Legal Framework for the Protection of Child Soldiers
- Ana Martin, Intersectional v. Narrow Approaches to Sexual and Gender-Based Crimes: Contrasting Outcomes and Gleaning Useful Techniques
- Livia Benschu, Gender Persecution and the Sarah O. Case: Strengthening the Rome Statute through Domestic Trials
- Evelyne Owiye Asaala, African Philosophical Contributions to International Criminal Law
- Kamil Sobański, Evolution of Remote Participation of the Accused and Victim in International Criminal Proceedings
Thursday, March 20, 2025
Ainley & Kersten: Hybrid Justice: Innovation and Impact in the Prosecution of Atrocity Crimes
The last decade has seen the unexpected re-emergence of hybrid and internationalised courts - institutions which operate with varying combinations of national and international law, procedure, and staff. Whilst the establishment of the permanent International Criminal Court should have made hybrid mechanisms largely obsolete, hybrids have recently been established or proposed for atrocity crimes committed in Chad, South Sudan, Israel/Palestine, the Central African Republic, Kosovo, Syria, Sri Lanka, Myanmar, The Gambia, Liberia, and Ukraine.
Hybrid Justice critically examines the resurgent promise of hybrid courts. Focusing on the fields, practices, innovations, and of hybrid courts, the contributors evaluate hybrids' success, and in doing so, help to clarify the conditions and mechanisms that makes hybrids likely to succeed in their mandates and impacts. The authors focus on hybrid courts and resilience: the resilience of hybrid mechanisms to withstand political and other pressures to deliver justice and accountability, and the potential contribution of hybrids to the resilience of affected communities.
Borne out of a collaboration between lawyers, academics, and activists, this edited volume provides a uniquely comparative account of the development of hybrid courts in recent years.
Wednesday, March 19, 2025
Hamilton: The Arms Trade and International Criminal Law: Reframing Accountability for Complicit Weapon Suppliers
Despite the establishment of UN embargoes, the Arms Trade Treaty (ATT), and the EU Common Position, arms export regulation suffers from significant legal and practical limitations. This book critically evaluates the existing body of 'Arms Trade Law', highlighting its inadequacies in preventing weapons from reaching perpetrators of mass violence.
Drawing on interviews, participant observation, and empirical research to assess the perspectives of judges and lawyers, it also explores the International Criminal Court's narrow focus on prosecuting political and military leaders. Arguing that institutional attitudes and commitments contribute to a legal culture that obscures the potential for an arms trader case, the book illustrates these dynamics through a case study of the UN Security Council's response to the Second Congo War and the ICC's investigations in the DRC Situation, elucidating missed opportunities to enforce accountability against the entire spectrum of actors responsible for international crimes.
Through detailed examination of the arms trade's complexities, The Arms Trade and International Criminal Law foregrounds the structural causes of atrocity and argues for broader accountability. It investigates how individuals-including corporate executives, state officials, and arms traffickers-can be held directly accountable for atrocities under international law, even when their actions are geographically or causally distant from the violence itself. Furthermore, by advancing a specific interpretation of the actus reus and mens rea elements of accomplice liability under Article 25 of the Rome Statute, this book argues for a robust legal basis upon which the ICC can prosecute arms traders. It therefore underscores how international criminal law can complement existing regulations by leveraging its expressive function to condemn all those who profit from atrocity.
New Issue: Virginia Journal of International Law
- Peter G. Danchin, Jeremy Farrall, Jolyon Ford, Shruti Rana & Imogen Saunders, International Law and the Rise of Populism
- Jens David Ohlin, War’s Rustic Code of Honor
- Ryan Liss, Complementarity and the Normative Structure of International Criminal Law
New Issue: Journal of International Wildlife Law & Policy
The latest issue of the Journal of International Wildlife Law & Policy (Vol. 27, no. 4, 2024) is out. Contents include:- Iyan Offor, International Wildlife Law’s Theoretical Turn
- Alice Di Concetto, Beyond Ecological and Economic Value: Taking into Account Wild Animals’ Inherent Interests in EU Environmental Law
- Veerle Platvoet, Growth From Common Ground: Animal Welfare in Wild Animal Law
- Katy Sowery, A Walk on the Wild Side: Wild Law and the EU’s Nature Restoration Law
- Elien Verniers, Exploring a Legal Framework for Compassionate Conservation: Guidance from the Deep Ecology Movement
- Håkon Evjemo, Delivering Spatial Justice to Wildlife: Merleau-Ponty and the Politics of Inhabitation
Seminar: Beyond Disasters: Environmental Chronic Emergencies in International Law
Tuesday, March 18, 2025
Call for Papers: 54th Annual Conference of the Canadian Council on International Law
Lawson & Wessel: Unity in Diversity: Perspectives on the Law of International Organizations – Liber Amicorum for Niels M. Blokker
- Rick Lawson & Ramses A. Wessel, Introduction: Niels Blokker’s Contribution to International Institutional Law
- Roeland Böcker, Restoring Justice Step 1: The Register of Damage for Ukraine
- Thomas Henquet, The UN Liability Rules and General International Law: Lex Specialis?
- Ian Johnstone, Security Council Oversight of Non-UN Operations: Law, Policy and Practice
- Giserd Marqeshi & Nigel D. White, Operational Lawmaking within the UN: The Origins of the Legal: Framework for Peacekeeping
- Michael Ramsden, ‘Uniting against Impunity’ in the New Cold War: Will the UN General Assembly Come of Age?
- Alfred van Staden, The Amazing Resurrection of NATO: Problems and Prospects
- Gian Luca Burci, Regime Complexity in Global Health: The Search for Multilateral Pandemic Governance
- Daniëlla Dam-de Jong, The UN Security Council and a Warming World: Coming to Terms with the Security Implications of Climate Change
- Jan Klabbers, Inter-organizational Collaboration: The World Organization for Animal Health and the One Health Initiative
- Brian McGarry, Weathering a Perfect Storm: Fundamental Questions of Institutional Law in Ocean Governance
- André Nollkaemper, The Quadripartite: Building Alliances between the WHO, the FAO, WOAH and UNEP
- Meagan S. Wong, The International Tribunal for the Law of the Sea and the Meeting of States Parties to the 1982 UN Convention on the Law of the Sea: Mare Ignotum for the Law of International Organizations?
- Eric De Brabandere & Jason Rudall, The Contribution of International Organizations to the Settlement of International Disputes
- Mielle Bulterman & Larissa van den Herik, The EU’s Foreign and Security Policy and Legal Remedies: Three Remarkable Cases before the EU Courts
- Jacob Katz Cogan, Statement Decisions as Institutional Authority
- Helen Duffy & Giulia Pinzauti, The International Court of Justice in Conflict: Reflections on the Role and Impact of the Palestine Litigation
- Huw Llewellyn, The United Nations Criminal Tribunals: Terminable Yet Independent?
- Carsten Stahn, When the Whole Becomes More than the Sum of Its Parts: How the ICC Re-Invented Itself through Complementarity
- Sergey Vasiliev, Governing International Justice: Whence the Unified Principles?
- Laurence Boisson de Chazournes and Pieter Jan Kuijper, Relations between ‘European Courts’: Towards Civilized Dialogue?
- Edward Kwakwa & Irina Chicu, The World Intellectual Property Organization’s New Strategic Direction: Serving Underserved Communities and Helping Transform IP into a Tool That Works for Building a More Sustainable Future
- Gabrielle Marceau & Maria George, The New Roles of the WTO
- Pierre Klein, Between Restraint and Enthusiasm: International Organizations’ Participation in Advisory Proceedings before the ICJ and ITLOS
- Liesbeth Lijnzaad, Anticipation, or the People That Make the Law of the Sea Convention Work
- René Urueña, Falling through the Cracks: Exploring the Role of Law in the Interaction between International Organizations
- Laurens-Jan Brinkhorst & Jaap Hoeksma, The European Union as a Democratic International Organization
- Helena Loutas-Paraskeva & Anmol Gulecha, Unity within Diversity: The Continuing Rise of Consensus
- Paolo Palchetti, Attaching Member State’s Financial Contribution to the Organization to Circumvent the Organization’s Immunity from Execution Let the State Pay?
- August Reinisch, The Privileges and Immunities of International Organizations and Equality: Some Reflections on Their Justifications from an Egalitarian Perspective
- Dan Sarooshi, The Personality and Responsibility of International Organizations
- Kirsten Schmalenbach, The Great Unknown General Principles Governing the Law of International Organizations
- Nico Schrijver, We the Peoples in International Organizations: An Unfinished Agenda
- Jean d’Aspremont, International Institutional Lawyers as Masters of Modern Philosophy
- Catherine Brölmann, Reading International Organizations: Between Legal Construction and Social Existence
- Edward Chukwuemeke Okeke, Law and Lawyering in International Organizations








