New insights for policy promoting peace and security in Europe and the world.

European policy affects our lives: from air quality to the frequency of a bus service. Leiden researchers analyse how the European Union functions, how countries apply European policy and whether this policy actually provides solutions and delivers.

On 9 September 2020, Ruben de Graaff defended his thesis 'Concurrence in European Private Law'. The doctoral research was supervised by Prof. A.G. Castermans and Prof. S.C.G. Van den Bogaert.

This paper series is the result of two rounds of PhD workshops organized by the editors at the TMC Asser Institute and Leiden University in 2024 on ‘The legal implications of the EU’s geopolitical awakening’, with the generous financial assistance of the Municipality of The Hague.

Voor zowel archeologen, paleontologen en geologen als vrijwilligers in de archeologie en paleontologie is het geen verrassing meer dat op de stranden van de Nederlandse kust fraaie vondsten gedaan kunnen worden. Vele artikelen, boeken, tentoonstellingen, congressen, lezingen, ‘zoekdagen’, krantenberichten,…

Het is een wijdverbreid idee dat (post-)middeleeuwse steden een sterfteoverschot hadden en zij slechts in leven konden blijven door de toestroom van migranten; een fenomeen dat bekend staat als het ‘urban graveyard’-effect. Over details valt te twisten, maar duidelijk is dat de stad en de dood dichter…

How do crises produce changes in specific European Union foreign policy areas, and how should we conceptualise these policy changes?

In this article, Madeleine Hosli, Professor of International Relations at the Institute of Security and Global Affairs, and Jaroslaw Kantorowicz, Assistant Professor at the Institute of Security and Global affairs, discusses the relevance of structural variables in a time where European politics are…

The debate about Africa’s changing relations with the world has rapidly evolved over the past decade. The initial emphasis on China’s role in Africa has given way to a more diversified approach, acknowledging that other emerging global players have also become important.

This edited volume offers a critical discussion of the trade-offs between transparency and secrecy in the actual political practice of democratic states in Europe. As such, it answers to a growing need to systematically analyse the problem of secrecy in governance in this political and geographical…

Cristina Grasseni’s project

In this article, Joris Larik and Richard Ponzio grasp the importance of the Summit of the Future to overhaul and strengthen multilateral cooperation in an age of deepening rifts and increasing competition between the great powers. This article argues that a failure to convene a meaningful and ambitious…

How do chemical contaminants traverse and affect terrestrial biodiversity and ecosystems?

Dit rapport maakt deel uit van het project Receptenboek burgerparticipatie in opdracht van de Rijksdienst voor het Cultureel Erfgoed (RCE) en met steun van het Fonds voor Cultuurparticipatie.

This book is the first comparative study of estimative intelligence and strategic surprise in a European context, complementing and testing insights from previous studies centred on the United States. It does extensive empirical analysis of open-source material and interviews in relation to three cases…

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

On 17 October 2018, Henriëtte Weststrate defended her doctoral thesis 'De Notaris en Private Rechtspraak'. The doctoral research was supervised by Prof.dr. H.J. van der Herik and Prof. mr. G.J. Meijer.

Are you thinking about studying Management van de Publieke Sector: Politiek, Beleid en Management? Learn more and watch thevideos. Please note that this programme is taught in Dutch.

Are you thinking about studying Management van de Publieke Sector: Bestuur en Advisering?Learn more and watch the videos. Please note that this programme is taught in Dutch.

De positie van kunst en kunstenaars in de westerse samenleving

The Jean Monnet and Common Market Law Review (CML Rev) Launch Conference of the CML Rev extraordinary issue ‘EU values and interests in a time of geopolitical transformation’ was held on 10 April 2026 at the University of Zagreb, Croatia.

Covid-19 is een disruptieve ontwikkeling die hier en nu veel vraagt van zorgprofessionals, bestuurders en managers. Hoewel de crisis nog volop bezig is, is nu al duidelijk dat het Coronavirus een blijvende impact zal hebben op zorginstellingen en fundamentele vragen oproept over hoe we onze zorg optimaal…

On 7 September 2023 Didem Durak Akser successfully defended a doctoral thesis and graduated.

Grasseni's contribution to this special feature on food cultures, food systems, and agriculture in Europe builds upon her ongoing project Food citizens? Collective food procurement in European cities: solidarity and diversity, skills and scale.

The German hand-reader Julius Spier (1887-1942) played an important role in the life of the Dutch Jewish diarist Etty Hillesum (1914-1943). This thesis argues that instead of being a charlatan - as he has become viewed through Hillesum's writings -, Spier was a talented hand-reader who 'psychologized'…

Met AI kunnen nieuwsredacties razendsnel beelden genereren — maar tegen welke prijs? Dit onderzoeksrapport opgesteld door prof. dr. Jaap de Jong, dr. Astrid Vandendaele, Maartje van der Woude en Stef Arends (Universiteit Leiden), baseert zich op 59 interviews met beeldmakers, redacteurs en experts uit…

Deze onderzoeksgroep richt zich op het thema ondermijning en financieel-economische criminaliteit, in het bijzonder de aanpak ervan op een aantal deelterreinen.

Many conflicts in Africa have been studied and described as location and time bound. Yet conflict is rarely confined and contained, and instead reaches across communities, borders, and generations.

The European union, where we live, work and study, is the most ambitious and powerful regional organization for international cooperation in the world. A mystery to many and derided by some, the EU has weathered intense geopolitical and economic storms over the last two decades. In doing so, it has…

Pintores, arquitectos y exposiciones internacionales –como las de Barcelona y Sevilla– tuvieron un papel crucial en la definición y visualización del carácter idiosincrático de cada región. Este libro pionero compara el proceso de construcción de identidades regionales en España con el de Francia y…

This programme video is presented in Dutch

Leiden University College and the Erasmus Center of Law and Digitalization, with the support of the Sectorplan SSH-Breed on Digitalization and the Netherlands Network for Human Rights Research, are announcing a Call for Abstracts for a two-day workshop, Digital and AI Governance at a Time of Geopolitical…

In nearly every Dutch primary and secondary school classroom, at least one child is bullied. The common perception is that the most popular child in the class is often the bully, while less popular children are more likely to be bullied. Is this image accurate? Bullying researcher Mitch van Geel knows…

On 18 November 2020, Mojan Samadi defended her thesis 'Normering en toezicht in de opsporing'. The doctoral research was supervised by Prof. J.H. Crijns.

On 19 February 2019, Mirjam Sombroek-van Doorm defended her thesis 'Medisch beroepsgeheim en de zorgplicht van de arts bij kindermishandeling in de rechtsverhouding tussen arts, kind en ouders'. The doctoral research was supervised by Prof. dr. A.G. Castermans en Prof. mr. C.J.J.M. Stolker.

From cities that sometimes deviate from national foreign policy to the direct influence of geopolitics on local developments, PhD candidate Pieter Jeroense, director of VNG International, examined seventy years of the internationalisation of Dutch municipalities and observed notable trends.

El Chorro de Maita, Cuba

Denk je erover om Journalistiek en Nieuwe Media te studeren? Leer meer over deze master en bekijk onderstaande introductievideo.

Many stimulating philosophical analyses have been written on contemporary technology; this book examines on the contrary how changes in contemporary technological environment have been reflected onto philosophy itself. The book shows how technological changes have marked a number of key concepts of…

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This book reveals how one publishing firm's editorial strategy helped to legitimate European colonialism in the early modern era.

Are you thinking about studying Criminologie en Veiligheidsbeleid? Learn more and watch the videos. Please note that this programme is taught in Dutch.