On 10 June 2021, Merinda Stewart defended her thesis 'Freedom of Overflight: A Study of Coastal State Jurisdiction in International Airspace'. The doctoral research was supervised by Prof. P.M.J. Mendes de Leon en Prof. J.J. Rijpma.

The International Institute of Air and Space Law (IIASL) at Leiden University has joined the Civil Air Navigation Services Organisation (CANSO) as its newest Research and Academia member.

How did disability become a global concern? In this project we will identify the contribution of international agencies, governmental and non-governmental organizations and, just as importantly, disabled people themselves, to the IYDP and by showing the connections, interactions and entanglements between…

This book presents an understanding of the concept of Countering Violent Extremism from a critical terrorism studies perspective using case studies from different countries while examining the issues it raises.

On Tuesday 17 October 2017 Alexandre Genest defended his PhD dissertation ‘Performance Requirement Prohibitions in International Investment Law’ as part of a double PhD programme at the Universities of Leiden and Ottawa. The Supervisors are Professors M.E. Koppenol-Laforce. F. Baetens (Universities…

Rutsel Martha, former Minister of Justice of the Dutch Antilles, former General Counsel of Interpol and alumnus of Universiteit Leiden, elaborated on the position of states and intergovernmental organizations (IGOs) in international financial law.

In this article, the authors analyse two major factors that deepen informality, namely multipolar geopolitics and the rise of non-state actors.

Professor of International Relations Daniel Thomas is clear: anyone taking peace in Europe for granted is shutting their eyes to reality.

Beatrice Noun (alumna BA International Studies) currently lives in Paris and works for the World Bank as a consultant while doing a master’s degree at Sciences Po in International Development. We caught up with her and asked her a bunch of questions like which steps lead her to this career path? And…

Assessing the feasibility and legitimacy of the current model of global tax governance and the role of the OECD and EU in international tax law-making.

What are International Studies Alumni doing after graduation? Get to know Guido, Paulien and Lennart. They all studied International Studies at Leiden University in The Hague and are now working in three different fields.

Conference

Since its inception, a central preoccupation of and for the International Criminal Court (ICC) has been the nature of its relationship to national jurisdictions. Complementarity—the idea that the Court is intended to supplement, not supplant, national jurisdictions—has been the dominant juridical logic…

Organised in four separate sessions throughout the day, and broadcast live online to guests and families who could not join, a total of 260 students received their Bachelor’s Diploma of International Studies on 28 August 2020 at the graduation ceremony in the historic Pieterskerk in Leiden.

On 18 January 2025, the Annual Reconnect & Gala of the Advanced MSc International Relations and Diplomacy (MIRD) celebrated over 20 years of bringing together current MIRD students, alumni, and faculty members. This year’s discussions focused on the theme: 'The Future of IR: Digital Innovation, Climate…

From peace missions and military intervention to climate adaptation and geopolitical competition, students of the Advanced MSc in International Relations and Diplomacy (MIRD) showcased the results of two years of intensive research at the annual Thesis Symposium on 22 May 2026.

The Grotius Centre for International Legal Studies is offering two internships on a full-time basis in spring 2019.

Organised in three separate sessions throughout the day, and broadcast live online to guests and families who could not join, over 200 students received their Bachelor’s Diploma of International Studies on 3 September 2021 at the graduation ceremony in the historic Pieterskerk in Leiden.

Violence during war often involves upswings and downturns that have, to date, been insufficiently explained. Why does violence at a particular point in time increase in intensity and why do actors in war decrease the level of violence at other points? Duyvesteyn discusses the potential explanatory variables…

The US attack and the arrest of Venezuelan President Maduro have raised questions worldwide. Two Leiden experts in international law, Anna Marhold and Jens Iverson of the Grotius Centre, told media outlets that this constitutes a violation of international law.

In this article for Studies in Conflict & Terrorism, the authors analyse the evolution and interplay of national policies and international diplomacy on cyber terrorism within and across the UNSC’s permanent five members and the UN process on cyber norms (GGE and OEWG).

The corona crisis is also a disinformation crisis for the global community in general, and for the European Union (EU) in particular. What is less clear is how adequate the EU’s response to the ‘infodemic’ has been. This essay exposes the dangers of disinformation for the EU, which have intensified…

On Thursday 29 January 2026 Uğur Derin successfully defended a doctoral thesis and graduated.

On 14 October 2019 the Institute of Security and Global Affairs (ISGA) convened a one-day International Business Diplomacy workshop, which was held under the auspices of The Hague Journal of Diplomacy.

Three years after the very first cohort of the Leiden University Bachelor of International Studies graduated, approximately 40 alumni and staff got together for a day of recollecting pleasant memories and sharing new stories. The BAIS Alumni Board collected some ‘Lessons learned’ from their alumni.

On September 20 and 21, a conference on the governance of international courts and tribunals took place at Leiden Law School.

On 9 January 2019, Marieke Wierda defended her thesis 'The Local Impact of a Global Court: Assessing the Impact of the International Criminal Court in Situation Countries'. The doctoral research was supervised by Prof. dr. C. Stahn en Prof. dr. L.J. van den Herik.

The Grotius Centre for International Legal Studies & The Kalshoven-Gieskes Forum on International Humanitarian Law cordially invite you to a Panel Discussion on “The Dynamics of the Syria Conflict: Challenges for Contemporary International Law” .

Reasserting America in the 1970s brings together two areas of burgeoning scholarly interest.

The organisation of the Platform for Postcolonial Readings is a collaboration of main organisers and occasional guest organisers.

A series of workshops at Leiden University and the University of Hamburg will act as a forum in which international legal scholars whose research adopts a behavioural approach can present their works-in-progress and gain feedback from a broad range of peers, including scholars in economics and cognitive…

On 2 September 2022, 300 students received their Bachelor Diploma of International Studies. The students were awarded their diplomas in the historic Pieterskerk in Leiden, in front of a large audience of family and friends. With about 1000 people present, including the graduates, the International Studies…

Leiden Law School’s Grotius Centre for International Legal Studies is pleased to announce its first massive open online course (MOOC). On 18 January 2016, International Law in Action: A Guide to the International Courts and Tribunals in The Hague will go live on Coursera, an education platform that…

Gender sidestreaming? Analysing gender mainstreaming in national militaries and international peacekeeping

The Kalshoven-Gieskes Forum on International Humanitarian Law and the Grotius Centre for International Legal Studies hosted the second annual “International Humanitarian Law Clinic Exchange Conference”, from 8 to 14 December 2016, in The Hague. The idea to organize the conference stems from a collaboration…

The Frits Kalshoven International Humanitarian Law Competition, organised by the Netherlands Red Cross and Belgian Red Cross-Flanders, lets students explore the legal framework governing armed conflict. Eight teams from Belgium and the Netherlands competed in the 19th edition (23–27 February 2026) in…

On 3 March 2022, Cambridge University Press published An Introduction to Public International Law, a co-authored textbook led by Cecily Rose.