Mary Ellen O'Connell

About/Bio

Mary Ellen O'Connell , JD, PhD is the Robert and Marion Short Professor of Law and is Professor of International Peace Studies, University of Notre Dame. She is also Visiting Professor of Law (Fall 2022) at University of Chicago. O’Connell’s research is in the areas of international law on the use of force and international legal theory.

Recently Published

Effective Opposition to Summary Executions in an Escalating Phony War at Sea

President Donald Trump’s attacks on small boats in the Caribbean and Pacific began on September 2, 2025.  To date, 87 people have been killed in 23 incidents, all on the high seas. The President has justified the killings by labeling the individuals involved “narco-terrorists” and linking his policy to the terror wars of his…

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The Unyielding Right to Assist Civilians in Gaza

The United Kingdom, Jordan, and the United Arab Emirates began airdropping humanitarian assistance into Gaza in the last days of July. They did so as the number of children dying of starvation grew. The extent of hunger and its causes in Gaza are detailed in a July 30 post by Dannenbaum and de Waal here.

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Speaking Truth to Trump on the International Rule of Law

Oxford historian Margaret MacMillan asked in the pages of Foreign Affairs whether our troubled world order would be able to survive the disruptive Donald Trump. She wrote that “today’s order appears to be stronger and more resilient than its 1930s counterpart” but, clearly, “norms that were long considered inviolable have been flouted.” She means flouted…

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