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[Andres Macías-Tolosa is a professor and researcher at Universidad Externado de Colombia, coordinator of the OPERA Research Group and editor of the OPERA Journal.   Joana de Deus Pereira is a senior research fellow at RUSI Europe, co-founder of the Private Military and Security Companies (PMSC) Research Group at King's College London, adjunct professor at Sciences Po, Paris, and visiting senior fellow...

[Gabriella Citroni is an adjunct professor of international human rights law at the University of Milano-Bicocca and senior legal advisor atTRIAL International. Chiara Gabriele is head of program for the Accountability for Private Military and Security Actors Program at TRIAL International. Danaé van der Straten Ponthoz is head of international advocacy and policy at Global Survivors Fund. Julie Bardèche is a senior legal advisor...

We are delighted to announce exciting developments on the editorial side of Opinio Juris that will strengthen our operations and further support our mission to serve as a leading forum for discussion on international law and international relations. First, we are thrilled to welcome four outstanding new Assistant Editors for Review. These talented individuals bring rich and diverse experiences in international law and will play a...

[The Legal Opinion Expert Group: Ademuni Odeke is a professor of international maritime law and policy and special advisor to the National Centre for the Sea and Maritime Law, at the Department of Maritime Law, University of Ankara (Türkiye). Alice Ollino is an assistant professor in international law and ricercatore at the University of Milano-Bicocca (Italy). Andrea Caligiuri is an associate professor of...

[Alessandra Spadaro works as Assistant Professor in Public International Law at Utrecht University. She is conducting a three-year project titled “Business in and for war: the role and limits of international humanitarian law”, which is funded by the Dutch Research Council.] In a recent post on this blog, my colleague Jérôme de Hemptinne calls on (Western) international lawyers to engage with...

On June 25, the Secretary General of the Council of Europe (CoE) and the President of Ukraine signed an agreement to create a Special Tribunal for the Crime of Aggression Against Ukraine (STCoA). The tribunal, which will be based on Ukraine's territorial jurisdiction but will have a number of international elements -- and is thus properly categorised as a hybrid...

[Jacob Bogart (X: @BogartJacob) is Counsel at Perseus Strategies, a 2025 Salzburg Global International Law Fellow and graduate of Columbia Law School] This post is the second part in a three-part series on the EU's Corporate Sustainability Due Diligence Directive (CSDDD). Part I dissects the Omnibus and other reform proposals. Part II maps the reactions to and legal implications of these...

[Jacob Bogart (X: @BogartJacob) is Counsel at Perseus Strategies, a 2025 Salzburg Global International Law Fellow and graduate of Columbia Law School] This post is the second part in a three-part series on the EU's Corporate Sustainability Due Diligence Directive (CSDDD). Part I dissects the Omnibus and other reform proposals. Part II maps the reactions to and legal implications of these...

[Jacob Bogart (X: @BogartJacob) is Counsel at Perseus Strategies, a 2025 Salzburg Global International Law Fellow and graduate of Columbia Law School] This post is the first part in a three-part series on the EU's Corporate Sustainability Due Diligence Directive (CSDDD). Part I dissects the Omnibus and other reform proposals. Part II maps the reactions to and legal implications of these...

[Anna-Christina Schmidl is a legal advisor and Eitan Diamond is a manager and senior legal expert, both in the Israel & Palestine team with the IHL Centre] Introduction The smashed city stretched to the frozen river. International law prohibited the targeting of medical facilities, which explained why, in a city where eighty percent of freestanding structures had been flattened, the hospital still...

[Joanna Kulesza is an Assistant Professor of International Law, and Executive Director at Lodz Cyber Hub, University of Lodz, Poland] Following the initial escalation of conflict between India and Pakistan, marked by India’s missile strikes on Pakistan-administered Kashmir on May 7, 2025, tensions quickly de-escalated. Despite this rapid decrease in hostilities, the episode left significant implications for the contemporary understanding of...

[Marina Aksenova is an Associate Professor of International and Comparative Criminal Law at IE University] In this concluding post, I would like to offer a few observations on the themes raised by the participants of the symposium. Above all, I would like to express my sincere gratitude to the contributors for taking time to reflect on my book and offer their...