The Future of Multilateralism addresses current challenges and future perspectives of international and regional organizations. It aims to uncover how stable the foundations of global cooperation really are, particularly in the light of the latest unilateral and protectionist practices of international…

On 9 April 2019, Yudan Tan defended her thesis 'The Rome Statute as Evidence of Customary International Law'. The doctoral research was supervised by Prof. dr. W.A. Schabas.

Growing public backlash against international organizations (IOs) and attacks of national political elites on the rule of law increasingly challenge governance by IOs.

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 21 February 2019, Ruben Zandvliet defended his thesis 'Trade, Investment and Labour: Interactions in International Law'. The doctoral research was supervised by Prof. dr. N.J. Schrijver.

On 9 November, Jonathan Hak defended the thesis 'Non-textual evidence in international criminal prosecutions: discovering the best practices for audiovisual materials in a digital age'. The doctoral research was supervised by Carsten Stahn and Jens Iverson.

On dinsdag 26 juni 2018, Linlin Sun defended her doctoral thesis ‘International Environmental Obligations and Liabilities in Deep Seabed Mining’. The doctoral research was supervised by Prof. dr. N.J. Schrijver en Prof. dr. E.C.P.D.C. De Brabandere.

Complex systems can be characterized as systems in which multiple components interact with each other, often in non-linear ways. The main goal of this research will be to investigate if and how the international tax system can be defined and modelled as a complex system. Approaching the international…

On 19 juni 2018 Matthew Gillett defended his doctoral thesis ‘Prosecuting environmental harm before the international criminal court’. His supervisor is prof. dr. L.J. van den Herik.

Are you thinking about studying European and International Human Rights Law? Learn more and watch the videos.

Are you thinking about studying European and International Business Law? Learn more and watch the videos.

The International Institute of Air and Space Law (IIASL) offers PhD candidates the possibility to enroll in the IIASL PhD Track. It is designed for 'external' PhD candidates (buitenpromovendi), who seek to pursue a PhD in Air Law or Space Law while honouring their professional commitments in paralle…

This master specialization offers you a combination of theories about learning problems and impairments and intervention and prevention strategies from a developmental perspective.

Study information

Peak Performance: Collaborative Crisis Management Before and During International Summits. This comparative case study probes into conditions for collaborative governance in the security organisation of international summits.

This book questions the accepted origins of the field of International Relations (IR). Commonly understood to have emerged from the horrors of WW1 with the goal of bringing about world peace, the authors argue that on the contrary, IR came from a somewhat less noble tradition – that of the Round Tab…

The development of space resource activities is happening now. In the absence of a clear framework to govern these activities, there is a need to examine the concepts that are being discussed in order to ensure that they meet existing treaty obligations regarding on-orbit operations and space resource…

This inaugural lecture discusses the question: How to cooperate in the digital era?

Jens Iverson, Assistant Professor of International Law and a Researcher in the Jus Post Bellum Project, defended his Ph.D. dissertation on 21 September 2017.

ISBA2025

The central question is whether the current regime of international humanitarian law governing the conduct of hostilities in armed conflict is still adequate to deal with modern conflict scenarios, or whether it needs revision or amendment.

When you apply for admission, you’ll be asked to submit several documents. Read more about the required application documents for your application

Application deadlines are very important to keep in mind. Please check the deadlines for extended NON-EU, scholarships, VISA and housing at this page.

Find out all you need to know about a visa and residence permit application with a member of the Admissions Office

Are you thinking about studying Global Conflict in the Modern Era? Learn more and watch the introduction video.

Maritime conflict management is the regulation of conflict in relation to the sea. It comprises conflict enforcement, conflict resolution and conflict avoidance. How did victims of maritime conflicts claim and obtain damages or demand compensation or reparation?

Read more about the International Network Open Science & Scholarship Communities in our Vision and Mission statements.

PhD defence

Alexandre Genest will defend his PhD dissertation ‘Performance Requirement Prohibitions in International Investment Law’ as part of a double PhD programme at the Universities of Leiden and Ottawa.

This article traces the evolution of interpretations of international law and international cyber norms on responsible state behaviour in cyberspace by reassessing five major – and allegedly state-led – cyber operations: Stuxnet 2010; Belgacom 2013-2014, the Ukrainian power grid 2015, the US presidential…

The Department of Civil Law is responsible for education and research in the field of civil law. We teach the master’s degree programme Civiel Recht (Civil Law LL.M.), attracting many students each year from Leiden and elsewhere.

Your tuition fee depends on a number of factors. These are your nationality, your study programme and whether you have already obtained a Dutch higher education diploma.

Vijf opleidingen van de Leidse rechtenfaculteit hebben een medaille ontvangen als ‘beste studie’. Dit blijkt uit onderzoek dat EW Magazine uitvoerde in samenwerking met ResearchNed. De Advanced Master Air and Space Law scoorde uitzonderlijk hoog en ontving een gouden medaille.

Home to the International Court of Justice and the International Criminal Court, The Hague is the perfect backdrop to explore conceptions of justice in our global society. Questions of human rights, peace, security and the environment present legal and policy challenges for governmental and non-governmental…

This summer school focuses on the emergence of sexual orientation, gender identity (SOGI) and intersex issues in different areas of international law, such as human rights law, refugee law, international economic law, and international criminal law. Further information for this summer course will be…

On 8 and 9 March 2018, the Leiden University team travelled to the office of the Danish law firm Plesner in Copenhagen for the Plesner pre-moot. This pre-moot is a pleading competition in preparation for the 25th Willem C. Vis International Commercial Arbitration Moot. The Moot is the world's biggest…

On 19 May 2020, Xuechan Ma defended her thesis 'Moving towards Coexistence and Cooperation: The Spratly Islands and International Law'. The doctoral research was supervised by Prof. N.J. Schrijver.

Videos shared on social media have become important evidence to hold perpetrators of human rights violations accountable. What does this increased use of digital open source evidence mean for the quality of international human rights accountability? Through an innovative experimental design, this project…

A large delegation from Leiden University’s Grotius Centre attended the annual conference of the European Society of International Law (ESIL) in Aix-en-Provence from 31 August to 2 September 2023. Staff members presented their research on various topics, adding to the scholarly discussion surrounding…

On 10 March 2021, Pieter Huizing defended his thesis 'Parallel Enforcement of International Cartels and Its Impact on the Proportionality of Overall Punishment'. The doctoral thesis was supervised by Prof. T.R. Ottervanger.

In this policy brief, Dennis Broeders, Els De Busser and Patryk Pawlak discuss attribution of in cyberspace from three different perspectives: criminal law, international law and policy. Published together with EU Cyber Direct.