Ingo is Professor for International Law and Social Justice at the University of Amsterdam where he directs the Amsterdam Center for International Law (ACIL) and leads the collaborative research project on Sustainable Global Economic Law (SGEL). In 2024 he is Braudel Senior Fellow at the European University Institute (EUI).
He works on international legal history and theory, with a focus on international economic and climate law. Currently, he researches the law of carbon markets in a historical perspective and writes a short book on “The Law of the Climate Crisis”.
Ingo was Editor-in-Chief of the Leiden Journal of International Law (2015-2014) and a Fellow at The New Institute (2021/22). He held visiting positions at UC Berkley, Jindal Global Law School, UC Berkeley, the National University of Singapore, Tel Aviv University, and he was a Hauser Scholar at New York University. He obtained his PhD from the Goethe University in Frankfurt while working as a researcher at the Max Planck Institute in Heidelberg.
His publications include Contingency in International Law: On the Possibility of Different Legal Histories (OUP 2021, with Kevin Jon Heller) and How Interpretation Makes International Law: On Semantic Change and Normative Twists (OUP 2012; Winner of the 2014 Book Prize of the European Society of International Law). He occasionally writes for public media, of which his essay Tragedy & Farce in Climate Commentary (2023) in the European Review of Books is an example.
His Inaugural Lecture on International Law and the Spectre of Inequality is available in print [here] and as a video, [here] (May 2019).