What factors can explain the dynamics of de facto statehood in Iraqi Kurdistan at internal, national and international levels? What has been the nature of the de facto statehood in Kurdistan since its inception?

In this article, Thijs van Dooremalen and Philip Smith investigate how public discourse of heatwaves have shifted in British newspaper discourse, drawing on Raymond Williams’s theory of dominant, emergent, and residual cultural patterns to analyse changes in language and interpretation over recent d…

On 10 October 2019, Janneke Vink defended her thesis 'The Open Society and Its Animals'. The doctoral research was supervised by Prof. P.B. Cliteur.

In the first part, we introduce a new condition, called toric-additivity, on a family of abelian varieties degenerating to a semi-abelian scheme over a normal crossing divisor.

On 29 June 2017, Doris Dull-Zessner defended her PhD dissertation “Value Congruence in a Multinational Corporation”. The supervisors are Professor J.A.A. Adriaanse and Professor J.I. van der Rest.

How can mentors and social workers foster the vocational identity of at-risk youth and improve their prospects?

What contributes to the successes and failures of governance networks in small to medium-sized Western European host cities in attracting International Organizations?

What drives the behaviour of accountability forums?

How does open government affect the level of public trust?

How does the design of online participation platforms influence the inclusivity of online direct participation?

The function of TLRs in innate immunity has aroused worldwide attention soon after its discovery. Because of the broad functions of TLR2 in innate immunity, the drive for the development of TLR2-targeted vaccines or therapeutic treatments has accelerated in the last decades.

How is the effect of kleptocracy on foreign policy change mediated by the political-administrative relationship?

How have the armed forces of the United Kingdom, the Netherlands and Belgium adapted to the OMLT task in Afghanistan, and what institutional changes have materialised as a consequence of this adaptation?

The aim of this dissertation is to provide insight in interethnic prejudice of children in the Netherlands and attitudes and ideologies that they are exposed to through two socialization agents (parents and children’s books).

This article investigates how parenthood serves as a critical turning point for young people in Latin America, influencing their criminal trajectories.

Do recent developments in the European security architecture signal the end of multilateral cooperation, or the beginning of a new era with emerging forms of international security collaboration?

How do Humanitarian Response Organizations (HROs) and Virtual & Technical Communities (V&TCs) collaboratively govern disaster sensemaking processes, and what challenges shape the effectiveness of these collaborations between 2010 and 2016?

Dionysius of Halicarnassus and Augustan Rome: Greek culture in the Roman world.

Promotores: J.J.M.M. Rutten, F.S. de Boer, Co-promotor: M.M. Bonsangue

What political factors affect the speed or duration of EU legislative decision-making?

How do public organizations use strategic regulatory communication in regulatory governance?

How do leadership behaviour repertoires take shape in public organizations?

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Carsten Stahn has just published Confronting Colonial Objects: Histories, Legalities and Access to Culture. The book is part of the OUP Cultural Heritage Law and Policy Series.

Has there been continuity or change in US counterterrorism policy since 9/11? What factors led to the continuity or change, and how do we classify any such continuity or change?

The Leiden Risk & Regulation Lab serves as hub for excellent research at the forefront of regulation and risk governance and acts a platform for engagement with the practice of, and education in, regulation and risk governance.

Care robots, medical treatments, deepfakes and self-driving cars all with the aid of artificial intelligence (AI). The BrAInpower exhibition at Rijksmuseum Boerhaave shows spectacular applications of AI and explains how it can make such huge leaps. Bas Haring, Professor of Public Understanding of Science,…

As an experiment, student Alicia Cai relied solely on AI tools such as ChatGPT and Claude for supervision while writing her thesis. What lessons were learned?

Papyrology+, founded in 2014, is a collaboration of Leiden scholars studying (Abnormal) Hieratic, Demotic, Aramaic, Greek, Latin, Coptic, and Arabic papyri from a socio-historical, economic and linguistic perspective. Papyrology+ aims to explore new opportunities and directions in the study of ancient…

In the January Quest issue is an article about a project done by three Media Technology students, from the Cool Science course by Bas Haring.

Read on these pages all about the history of Leiden University, the oldest university in the Netherlands. The Academia Lugduna Batava was founded in 1575 and its motto is: Libertatis Praesidium ('Bastion of Freedom').

Leiden’s Institute for History has an exceptionally strong expertise in Medieval European History, with specialists whose interests cover virtually the whole continent.

Studying one another’s languages and cultures fosters understanding between groups of people, which leads to more equality, along with increased economic, administrative, and cultural cooperation.

A flake of limestone (ostracon) inscribed with an ancient Egyptian word list of the fifteenth century BC turns out to be the world’s oldest known abecedary. The words have been arranged according to their initial sounds, and the order followed here is one that is still known today. This discovery has…

PhD candidates are encouraged to start thinking about job prospects well before the defence of their thesis. Many PhD graduates find employment in an academic or semi-academic environment.

Which young scientists are best at explaining their research in three minutes and can take part in the national finals? These questions were answered on 14 February in the Academy Building. Researchers Laura Steenbergen (cognitive neurosciences) and Christian Eistrup (astronomy) impressed the judges…

Conceptualizing ceasefires as bargaining instruments challenges established ideas about the processes that lead up to conflict settlement, and about war re-emergence, with important implications for our understanding of war and peace.

Why do sexual violence policies still fail to systematically address men and masculinities, when the need for cultural change among men has been central in public debates since #MeToo?

In this research I assess the impact of the recently discovered gas reserves south off Cyprus on the escalation of the Cyprus conflict.

This dissertation aims to provide insight in ethnic prejudice in Chinese-Dutch children and the ethnic socialization context they are exposed to through three social-contextual factors, i.e., parents, children’s books, and the COVID pandemic.

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The essay For progress has been published to mark the 450th Dies Natalis of Leiden University. In 2025, we are celebrating our 450th anniversary, and the theme of this special year is Ahead of the Times.

How can the problems in establishing a sustainable common security and defence mechanism for the EU be explained?

The University wants its teaching and research to have the maximum academic, cultural, social and economic impact.

Explore the MSc in Nationalism, Ethnic Conflict and Development at Leiden University: study governance and diversity, choose elective seminars, complete a thesis and optionally an internship.