Use of Force

[Dire Tladi is a  Professor of International Law at the University of Pretoria.] Introduction I first met Harold Hongju Koh in 2009 at a retreat on the definition of the crime of aggression for the purposes of the Rome Statute just outside New York. From my first engagement with him, I immediately knew two things about the man. First, our approaches to...

[Stephen Pomper is a non-resident senior fellow at Columbia Law School's Human Rights Institute and New York University Law School's Center for Law and Security, and served in a range of U.S. government legal and policy roles from 2002 through 2016.  The post is written in his personal capacity and draws on research conducted as a Senior Policy Scholar at...

To celebrate the launch of our new website and new members, Opinio Juris will be holding a symposium over the next two weeks on Harold Hongju Koh's new book, The Trump Administration and International Law, which was just published by Oxford University Press. (You can get a 20% discount by clicking on the OUP advertisement to the right of this...