ESIL Conversations | Violations of peremptory norms and erga omnes obligations: What role for international responsibility? | 13 October 2026

The European Society of International Law (ESIL)

is hosting  

ESIL CONVERSATIONS

“Responsibility of States and International Organisations in Times of Accountability Gaps: 25 Years of ARSIWA and 15 Years of ARIO”

“Violations of peremptory norms and erga omnes obligations: What role for international responsibility?“

13 October 2026, 15:00-16:30 Rome time, Online

<Registration closes on 13 October 2026 at 14:00 (Rome time)>

THE ESIL CONVERSATIONS

The ESIL Conversations are conceived as a series of online events through which The European Society of International Law (ESIL)  aims to contribute to the discourse on international law. The second series, “Responsibility of States and International Organizations in Times of Accountability Gaps: 25 Years of ARSIWA and 15 Years of ARIO”, aims to critically examine how contemporary practice has exposed legal gaps and revealed new, uncodified tendencies in these areas, calling for a critical reassessment of the solutions adopted by the ILC and an assessment of their current role and potential future developments.

MORE ABOUT THE CONVERSATION “VIOLATIONS OF PEREMPTORY NORMS AND ERGA OMNES OBLIGATIONS: WHAT ROLE FOR INTERNATIONAL RESPONSIBILITY?”

In the second session of this brand-new ESIL Conversation series, our ESIL Board members Giulio Bartolini and  Patrycja Grzebyk, will moderate a distinguished panel of experts formed by:

• Masahiko Asada,  Professor, Doshisha University, Member and Special Rapporteur, UN International Law Commission
• Helmut Aust, Director at the Max Planck Institute for Comparative Public Law and International Law
• Charlotte Beaucillon, Professor of Public Law, Université Paris-Est Créteil Val-de-Marne 
• Diane Desierto, Professor of Law and Global Affairs, Notre Dame Law School 
• Priya Urs, Lecturer in International Law and Politics, University College London

will explore the role of international responsibility in addressing violations of peremptory norms and obligations erga omnes. The conversation will examine the particular implications of such violations and consider how the law of international responsibility responds when fundamental obligations of the international legal order are at stake.