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By any standard, the Pre-Trial Chamber's rejection of Libya's admissibility challenge is a crushing defeat for the Libyan government. Libya's challenge failed for two basic reasons: (1) Libya is not investigating the same case as the OTP; and (2) Libya is currently unable to genuinely prosecute Saif. I will address the first ground, which I think is legally correct but...

Irini Papanicolopulu highlights the important and sometimes central role that non-state actors have in the whaling disputes between Japan and Australia.  Invoking the traditional lens of international law, she considers whether the actions of Sea Shepherd Conservation Society (SSCS) or the Institute for Cetacean Research can implicate state responsibility. Her conclusion is properly uncertain given the murky relationships between Australia...

This week we are delighted to bring you a symposium exploring the intersection between the law of responsibility and the law of the sea.   The motivation for this symposium is twofold: First, although there is long interaction between the law of the sea and the law of responsibility, the law of the sea has become an area where the intersection is of...

In previous posts (here and here), I discussed the reasons why Obama will never actually enforce the "near certainty" standard regarding civilian casualties and noted that the standard is vastly more restrictive than IHL's principle of proportionality. In this post, I want to explain why the new targeting standards for the use of lethal force "outside the United States and...

For the procrastinators among us, here's another friendly reminder about our New Voices Symposium coming up in July and August. As a recap, this July, we are planning to launch a new feature called New Voices: a two-month online symposium to run alongside our regular posts. Our goal is to give students, new practitioners and emerging scholars a chance to profile...

In the wake of Obama's memorable statement, a number of bloggers have questioned whether the Boston bombings deserve to be labeled "terrorism." Most of those bloggers -- such as the excellent Ali Abuminah here -- emphasize that many US definitions of terrorism require the violent act in question to be politically or ideologically motivated, which is still an open question with regard...

With the steady stream of posts on Kiobel in the past 24 hours, you may have lost track of it all. So here is a little insta-roudup with links to all the posts we've had so far (there'll be more in the regular roundup on Saturday). To start, you can find the opinions here. Julian posted on Roberts' opinion, Kennedy's concurrence (as did...

We have invited several academic luminaries to post here at Opinio Juris over the next few days about the Supreme Court's decision in Kiobel. We also are going to try something new and invite young academics to submit guests posts for possible publication. We can't guarantee we will publish every post submitted, but we would love to broaden the discussion...