Allen S. Weiner is senior lecturer in law and director of the Stanford Program in International Law at Stanford Law School. He is also the co-director of the Stanford Center on International Conflict and Negotiation. He is an international legal scholar with expertise in such wide-ranging fields as international and national security law, the law of war, international conflict resolution, and international criminal law (including transitional justice). His scholarship focuses on international law and the response to the contemporary security threats of international terrorism, the proliferation of weapons of mass destruction, and situations of widespread humanitarian atrocities. He also explores the relationship between international and domestic law in the context of asymmetric armed conflicts between the United States and nonstate groups and the response to terrorism. In the realm of international conflict resolution, his highly multidisciplinary work analyzes the barriers to resolving violent political conflicts, with a particular focus on the Israeli-Palestinian conflict. Weiner’s scholarship is deeply informed by experience; for more than a decade he practiced international law in the U.S. Department of State, serving as an attorney-adviser in the Office of the Legal Adviser and as legal counselor at the U.S. Embassy in The Hague. In those capacities, he advised government policy-makers, negotiated international agreements, and represented the United States in litigation before the Iran-United States Claims Tribunal, the International Criminal Tribunal for the Former Yugoslavia, and the International Court of Justice. He teaches courses in public international law, international conflict resolution, and international security matters at Stanford Law School.

Weiner is the author of "Constitutions as Peace Treaties: A Cautionary Tale for the Arab Spring” in the Stanford Law Review Online (2011) and co-author (with Barry E. Carter) of International Law (6th ed. 2011). Other publications include “The Torture Memos and Accountability" in the American Society of International Law Insight (2009), "Law, Just War, and the International Fight Against Terrorism: Is It War?", in Intervention, Terrorism, and Torture: Contemporary Challenges to Just War Theory (Steven P. Lee, ed.) (2007), ”Enhancing Implementation of U.N. Security Council Resolution 1540: Report of the Center on International Security and Cooperation” (with Chaim Braun, Michael May & Roger Speed) (September 2007), and "The Use of Force and Contemporary Security Threats: Old Medicine for New Ills?", Stanford Law Review (2006).

Weiner has worked on several Supreme Court amicus briefs concerning national security and international law issues, including cases brought involving "war on terror" detainees.  He has also submitted petitions before the United Nations Working Group on Arbitrary Detention on behalf of Vietnamese social and political activists detained by their governing for the exercise of free speech rights.

Weiner earned a BA from Harvard College and a JD from Stanford Law School.