This edited volume explores how artificial intelligence (AI) is transforming international conflict in cyberspace.

The relationship between States and foreign corporations are regulated by international economic law and international investment law in particular. Any disputes between States and foreign corporations must therefore also be solved by reference to this body of public international law, for example when…

Contributions to the UNEP international panel for sustainable resource management

On 26 February 2020, Hans-Jan van Kralingen defended his thesis 'De ondeelbaarheid van het pand- en hypotheekrecht, deconstructie van een leerstuk'. The doctoral research was supervised by Prof.mr. W.J. Zwalve and Prof.mr. E. Koops.

The International Labour Organisation (ILO) was established in 1919 based on the premise that social justice is a condition for lasting peace. On February 2019 the ILO celebrated its 100th anniversary with an international symposium to consider the future of the ILO.

‘Internationale Politiek’ is a specialisation in the BSc programme in Political Sciences. It combines the core political science subjects with the study of international and global processes and institutions. This specialisation is partially taught in Dutch and based in Leiden.

On 25 September 2019, Luuk Esser defended his thesis 'De strafbaarstelling van mensenhandel ontrafeld'. The doctoral research was supervised by Prof. C.P.M. Cleiren and Prof. J.M. ten Voorde.

On 22 November 2018, Teico Sikkema defended his thesis 'Beginsel en begrip van verdeling'. The doctoral research was supervised by Prof. mr. W.G. Huijgen and Prof. dr. F. Sonneveldt.

Ending the United Kingdom’s (UK) forty-seven year European Union (EU) membership has fundamentally transformed its relationship with the EU. After years of tumultuous negotiations, international law now once again governs the UK’s relationship with the EU. This has resulted in a sophisticated body of…

Willem Peene defended his thesis on 12 January 2017

Public International Law is a one-year Master’s specialisation at the internationally acclaimed Leiden Law School at Leiden University. The programme focuses on the legal framework that governs international relations in an increasingly complex global society.

On 14 November 2019 Niek Schipper defended his thesis 'De invloed van de woonplaats op de fiscale behandeling van grensoverschrijdende werknemers'. The doctoral research was supervised by Prof. S.C.W. Douma and Prof. J.P. Boer.

The two-year Advanced MSc IRD programme offers you a unique blend of academic education in international relations and political science with practical graduate education and training in international negotiation and diplomacy.

You can find more information on the Dutch webpage. Click on the “Nederlands” button above.

Valedictory lecture

No nation-state can solve today's global challenges on its own. In the specialisation International and European Governance you will obtain a deep understanding of the interplay between the international, EU, and (sub)national governance systems and how this interplay affects the capacity of public…

The International Air Law Moot Court Competition is a unique opportunity for students seeking to gain experience in the development of arguments in the field of international law and international air law, while also establishing contacts around the world.

Are you interested in international organisations, issues of peace and security, or current changes in global political relations? Would you like to study the causes of terrorism and the resolution of violent conflicts? Develop your scholarship and skills in international affairs in The Hague.

Anna van Buerenplein, Anna van Buerenplein 301, 2595 DG, The Hague

Women in International Security -Netherlands (WIIS-NL) is an affiliate of WIIS Global. WIIS-NL Members include: professionals, civil servants, academics, NGOs, employees of international bodies and organizations, embassy staff, politicians, students, and interested members of the general public. The…

Addressing Global Challenges through International Scientific Consortia

Just published: Nederlands internationaal privaatrecht Special issue: Private international law and finance

This edited publication aims at reflecting on the future of discussions on the applicability of international law to States’ use of ICTs in the context of highly politicised discussions at the multilateral level and offering practical suggestions for the European Union to pursue its objectives in this…

De menselijke geschiedenis strekt zich ver uit vóór de tijd waarin de mensen opschreven wat er zoal gebeurde.

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

Anna van Buerenplein, Anna van Buerenplein 301, 2595 DG, The Hague

Anna van Buerenplein, Anna van Buerenplein 301, 2595 DG, The Hague

We are convinced that you’ll have a wonderful time at Leiden University, but you don’t have to take our word for it. If you’re looking for objective opinions of what it’s like to study here, listen to what current students and alumni have said about it!

Do you want to understand regional and global dynamics? Would you like to learn a new language? Do you want to understand world news from new perspectives? Are you interested in exploring the many aspects of other societies? Are you interested in the effects of globalisation on daily life? The International…

Do you want to understand regional and global dynamics? Would you like to learn a new language? Do you want to understand world news from new perspectives? Are you interested in exploring the many aspects of other societies? Are you interested in the effects of globalisation on daily life? The International…

The focus of our theoretical research is understanding the behaviour of soft condensed matter, physical matter which is deformed or structurally altered by thermal fluctuations or small stresses.

We investigate the physics and design of mechanical metamaterial, intricately sculpted materials with properties set by their architecture.

On the occasion of prof Paul van der Heijden’s stepping down as Rector Magnificus and President of the Executive Board of Leiden University in 2013 the Chair bearing his name on Social Justice was established. It was a “farewell present” of the Leiden University to it’s Rector.

The International Bachelor in Psychology in Leiden takes you along all the different subdisciplines in Psychology.

Political scientists Marijn Nagtzaam (Leiden University) and Patrick van Erkel (University of Antwerp) investigate how electoral rules affect intra party preference voting. Focusing on the effect of two specific rules—the option to cast a list vote and on a single versus multiple preference vote—and…

Are you thinking about studying International Relations and Diplomacy? Learn more and watch the videos.

Majorana meets a mermaid

Van Steenis, Einsteinweg 2, 2333 CC, Leiden

Van Steenis, Einsteinweg 2, 2333 CC, Leiden

Are UN sanctions regimes in need of further formalization in terms of substantive design, procedural architecture and with a view to regulating and governing the interplay with other regimes?

This book offers a comprehensive analysis of the international law applicable to cyber operations, including a systematic examination of attribution, lawfulness and remedies. It demonstrates the importance of countermeasures as a form of remedies and also shows the limits of international law, highlighting…

In this course, you will gain a deep insight into the rules that govern armed conflict, and aim to mitigate human suffering on the battlefield. You will explore the why and how of International Humanitarian Law, followed by the different types of conflict.

Are you thinking about studying International Relations: Culture and Politics? Learn more and watch the introduction video.

Bachelor, Master

Chromatin is an ubiquitous protein-DNA complex that forms the structural basis of DNA condensation in all eukaryotic organisms.

Discover the new MSc in Public Sector Economics at Leiden University, offered entirely in Dutch. This program prepares future policy economists by bridging economic theory, Dutch institutions, and real-world policy challenges. Starting September 2025 in The Hague, it focuses on key issues like inequality,…

This book is the first to incorporate current academic literature and case law on European, transnational, and international media law into a comprehensive overview intended primarily for students.

This project studies social distance—the degree of sympathetic understanding that exists between people—in relation to state foreign policy making. Does, and if so how does, social distance shape political biases, aid narratives, and, ultimately, state foreign policy priorities and decisions?

This PhD-thesis analyses the relationship between the parties’ choices in the CPB Netherlands Bureau for Economic Policy Analysis’ assessments of the election manifestos and coalition agreements over the period 1986-2017, and tries to explain this relationship.