State fragility and conflict continue to be among the most enduring development challenges of the 21st century. The consequences of fragility and conflict on individuals, States and the international community are profound. At the individual level, an estimated 2 billion people or a quarter of the world's…

Yi-Wen Cheng defended her thesis on 28 May 2015

This monograph, written by dr. Dennie Oude Nijhuis and published by Cambridge University Press, discusses the postwar development of the welfare state.

This article offers an inaugural assessment of how silences implicate international law-making in cyberspace through descriptive and normative lenses.

Antoaneta Dimitrova, Professor Comparative Governance at Leiden University, Honorata Mazepus, Assistant professor at Leiden University and Dimiter Toshkov, Associate Professor at Leiden University, together with three other authors researched which aspects of state capacity might contribute to opening…

A discourse on international cyber norms has emerged ever since the United Nations Group of Governmental Experts on Developments in the Field of Information and Telecommunications in the Context of International Security (UN GGE) recommended eleven norms on responsible state behaviour in cyberspace.

On 16 June 2020, Andrea Varga defended her thesis 'Establishing State Responsibility in the Absence of Effective Government'. The doctoral research was supervised by Prof. N.J. Schrijver and Prof. F. Baetens (University of Oslo).

Political Islam is not new to the Middle East, but the appearance of ISIS has stretched the phenomenon to the extreme.

Organisations such as the EU are of enormous benefit to the member states, but the inhabitants of the member states are often unaware of this. Leiden researchers investigate whether international organisations such as the EU or ASEAN are able to influence global politics.

On 27 June 2019, Vid Prislan defended his thesis 'Domestic Courts in Investor-State Arbitration: Partners, Suspects, Competitors'. The doctoral research was supervised by Prof. dr. N.J. Schrijver.

Slavoj Žižek is one of the most prominent public intellectuals of the left. His central claim holds that “today, it is more crucial than ever to continue to question the very foundations of capitalism as a global system”.

State utilization of 'hukum adat' and its implication for the Indonesian rule of law

When you have finished your dissertation, it is time to prepare for the defence procedure.

Dimiter Toshkov, Associate Professor, Brendan Carroll, Assistant Professor, and Kutsal Yesilkagit, Professor International Governance, of Leiden University, wrote an article for the Washington Post about the European governmenets that acted quickly in times of a pandemic. And these governments are…

In this article, Kuipers and Timmermans analyze the first lady's relationship with policy problems in the period 1945-2013.

During the 1980s and early 2000s, authors like Alex Schmid and Andrew Silke demonstrated the paucity of first-hand insights being used to study terrorism and the consequences this had for the reliability of the findings beings presented. But to what extent have these issues endured?

Lithic Biographies in the Neolithic and Bronze Age, Prof. Annelou van Gijn (2010)

This book offers novel perspectives on the national and international dimensions of the post-war welfare state in Western Europe and North America.

Last September Henk Borgdorff participated in the art and research funding expert meeting of funding agencies initiated by the Society for Artistic Research (SAR).

Ancient Greek is well-known for displaying relatively free word order. This dissertation examines word order variation in the Koine Greek of the New Testament Greek in a variety of domains: declarative clauses, questions and relative clauses. In particular, I examine the way in which word order corresponds…

Advancing the understanding of the interaction of light and matter on the single-quantum level is important for near-future quantum technologies but also to answer fundamental questions.

The adsorption of D2 and CO2 on catalyst surfaces is studied using a molecular beam in ultra-high vacuum.

This edited volume provides a synthesis on the question of business attitudes towards and its influence over the development of the modern welfare state. It gathers leading scholars in the field to offer both in-depth historical country case studies and comparative chapters that discuss contemporary…

Over thirty research projects have been awarded a grant from the Leiden University Fund (LUF). The academics each receive a sum of between 5,000 and 25,000 euros to conduct their research.

On 22 June, Najib Amin defended the thesis 'State-building, lawmaking, and criminal justice in Afghanistan: a case study of the prison system’s legal mandate, and the rehabilitation programmes in Pul-e-charkhi prison'. The doctoral research was supervised by Jan Michiel Otto and Pauline Schuyt.

Lecture, LUCL Colloquium - Series '24/'25

Subproject of

This thesis highlights the significant role of surface geometry and oxidation state in determining CO adsorption behavior on copper surfaces.

The research addresses the question of “what is the impact of geopolitical changes to the pivot states in the Middle East? With special focus on Turkey, Iran and Saudi Arabia.”

This book offers a comprehensive analysis of China's global resurgence and its effects on U.S. dominance.

Does foreign aid promote human rights?

Ramesh Ganohariti will examine legal identity in three post-Soviet aspirant states and outline four common scenarios in this article.

The earth has more than 7 billion inhabitants, all of whom leave behind traces of pollution. However, not all forms of pollution have the same harmful effect. Leiden scientists help determine where we should put our priorities.

A single self-assembled semiconductor quantum dot in a high-finesse optical microcavity - the subject of this thesis - is an interesting quantum-mechanical system for future quantum applications. For instance, this system allows trapping of an extra electron and thus can serve as a spin quantum memory,…

On 28 February 2019, Kabir Duggal defended his thesis 'Principles of Evidence in Investor-State Arbitration, Burden, Standards, Presumptions & Inferences'. The doctoral research was supervised by Prof. dr. E. De Brabandere.

In this article, the authors explore why there is substantial cross-national variation in the level of regulatory clarity surrounding cryptocurrencies

The authors explore the decision-making processes and debates surrounding EU member states' troop contributions to CSDP military deployments.

In this book, Lydie Cabane examines the history of disaster management in South Africa.

On 28 November 2025, Leiden University and PLNT Leiden hosted “The Knowledge Orchard” - an event aimed at starting up/ enhancing interdisciplinary cooperation between academics at Leiden University, and improving collaboration between Leiden researchers and external partners in research and educatio…

This article presents a five-step framework for building behavioural cybersecurity strategy to reduce human-related risks affecting organisational security

In this article, Martin Sievert and Jonas Bruder investigated whether and how administrative burdens influences citizens' perceptions of welfare policies and attitudes towards beneficiaries.

This new article by Monica Kaminska is part of a special issue for Journal of Cybersecurity, based on a selection of contributions from THe Hague Program for Cyber Norms' 2019 Conference.

The process of unification and the character of the union are the central topics of Magnanimous Dukes and Rising States. Robert Stein mirrors continuity and modernisation in Burgundian times with the bankruptcy of the former dynasties and the decline of feudal government. The powerful towns played an…

Reputation literature has provided crucial insights about the evolution of the US regulatory state. Daniel Carpenter’s influential account painstakingly demonstrates the relevance of reputation to bureaucratic ‘power’ and to early institutional state-building in the US context. We argue that adopting…

In recent decades, the Netherlands’ struggle with multiculturalism has caused an upsurge in public interest in the relationship between state and religion. In this, the Dutch address a subject relevant not just to them, but to all of Europe.

Mei-Wen Chen defended her thesis on 29 June 2016

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.

Promotores: Prof.dr. H.S. Overkleeft, Prof.dr. G.A. van der Marel