Symposia

[Jutta Brunnée is University Professor and Metcalf Chair in Environmental Law at the Faculty of Law of the University of Toronto.] With her provocative new article Making Sense of Customary Law, Monica Hakimi challenges doctrinalists as well as theorists of international law to engage in a sophisticated conversation about a classical problem: how do we know when customary international law (CIL) exists as “a general practice...

Introduction Monica Hakimi’s new article, “Making Sense of Customary International Law,” is my favourite kind of scholarship: bold, critical, revisionist, tendentious. Too few scholars are brave enough to confront the sacred cows of public international law this forthrightly, and for that reason alone Hakimi deserves our thanks and praise. That said, I disagree with nearly every word in Hakimi’s article. An adequate response would require an article of its...

[David Stewart is Professor from Practice; Co-Director, Global Law Scholars Program; Director, Center on Transnational Business and the Law at Georgetown Law.] As a general proposition, the law prizes clarity, precision and certainty.  Tolerance of ambiguity is not a virtue taught in most law school classrooms.  That’s one reason why beginning students of international law often find it difficult to grasp...

[Monica Hakimi is the James V. Campbell Professor of Law at Michigan Law School.] I’m extremely grateful to Opinio Juris for hosting this symposium on my recent article on customary international law (CIL). And I’m honored by the fantastic group of contributors. In the article, I aim to dismantle a common conception of CIL—an idea that shapes how many international lawyers think...

This week, we have the pleasure of hosting a robust discussion on Monica Hakimi's latest article, Making Sense of Customary International Law. Abstract: This Article addresses a longstanding puzzle about customary international law (CIL): How can it be, at once, so central to the practice of international law—routinely invoked and applied in a broad range of settings—and the source of...

I want to call readers' attention to an upcoming Opinio Juris symposium that is being organized by two fantastic young critical international law scholars, Mohsen al Attar (Warwick) and Rohini Sen (O.P. Jindal). They are looking for a few more contributions, per the Call for Papers -- really a Call for Posts -- below. Note that they would like to...

[Dr. Jelena Aparac is lecturer and legal advisor in international law, with a research focused on Business and Human Rights in Armed Conflicts; and a Member of the UN Working Group on mercenaries. This is the second part of a two-part post. This is part of a series of blog posts examining International Criminal Law and the Protection of the Environment, and stems from an expert meeting...

[Dr. Jelena Aparac is lecturer and legal advisor in international law, with a research focused on Business and Human Rights in Armed Conflicts; and a Member of the UN Working Group on mercenaries. This is the first part of a two-part post. This is part of a series of blog posts examining International Criminal Law and the Protection of the...

[Kate Mackintosh is the inaugural Executive Director of the Promise Institute for Human Rights at the UCLA School of Law. This is part of a series of blog posts examining International Criminal Law and the Protection of the Environment, and stems from an expert meeting group convened at the Promise Institute for Human Rights at UCLA School of Law in February...

[Reinhold Gallmetzer is Chair of the Board of Director for the Center for Climate Crimes Analysis (“CCCA”) and an Appeals Counsel for the Office of the Prosecutor of the International Criminal Court. Nema Milaninia is an Advisory Board member of CCCA and formerly a Trial Attorney for the Office of the Prosecutor of the International Criminal Court.  The views expressed herein are those of...

[Darryl Robinson is an Associate Professor at Queen’s University Faculty of Law (Canada), specializing in international criminal justice. This is part of a series of blog posts examining International Criminal Law and the Protection of the Environment, and stems from an expert meeting group convened at the Promise Institute for Human Rights at UCLA School of Law in February 2020.] In...