Nikola Hajdin is a Research Fellow at the Georgetown Center for the Constitution. Prior to joining Georgetown, he was a Fellow at the Program in Law, Science & Technology at Stanford Law School. His research lies at the intersection of criminal law, the First Amendment, and international law. Currently, he is working on two projects. The first, “Freedom of Speech and Criminal Solicitation,” explores the boundaries between constitutionally protected subversive advocacy and the solicitation of unlawful conduct. The second, “Who Should We Blame for Aggressive Wars?” develops a new theory of individual criminal responsibility for the crime of aggression and examines its broader implications for international law. He has a forthcoming book, “The Crime of Aggression: A Theory of Individual Responsibility and Modes of Participation,” to be published by Bloomsbury/Hart Publishing (Oxford).

Prior to coming to the United States, Nikola was a Fellow at the Faculty of Law and Christ Church, Oxford University. He has taught law at various universities, including Georgetown University Law Center and Oxford University. He holds a Ph.D. in international law from Stockholm University (2021) and has received legal training at Harvard Law School and Cambridge University. Before entering academia, he practiced law for nearly five years in France, the Netherlands, Sweden, and Serbia. In 2016, he clerked for Judge Helena Jäderblom at the European Court of Human Rights in Strasbourg, and in 2015, he worked for the Office of the Prosecutor at the International Criminal Court.

Since 2014, Nikola has published academic articles in leading law journals, book chapters for Cambridge University Press, and case notes for Oxford University Press. His work has appeared in, among others, the American Journal of International Law, the Michigan Journal of International Law, and the Leiden Journal of International Law. His teaching interests include criminal law, criminal procedure, international law, the First Amendment, and national security.