Promotor: Prof.dr. P. Stevenhagen, Co-promotor: Prof. dr. B. de Smit

Right-wing ideology is a dominant force in Israel today. Between 2009 and 2021, and again since 2023, Likud-led governments headed by Benjamin Netanyahu consolidated their vision for the country’s identity and its place in the Middle East. Radicalized Conservatism in Israel presents this vision’s ideological…

Sub-Saharan Africa has seen a significant rise in terrorist acts and radicalized youth since the appearance of Boko Haram in 2009 and the fall of Libya in 2012. This book investigates the deeper layers of radicalization in Sub-Saharan Africa, which is situated in a larger global tendency.

In this article, Bart Schuurman and Sarah Louise Carthy explore the distinctions between radicalised individuals and the general population

Innovation plays an essential role in firms' competitiveness and long-term success. It varies from different types, ranging from run-of-the-mill innovation that brings incremental changes to existing technologies to radical innovation that breaks from existing trajectories.

On Wednesday 14 May 2025 Remzi Çakırlar successfully defended a doctoral thesis and graduated.

Why does one person radicalize to involvement in terrorist violence within a group-based context, while another engages in this form of violence alone?

How do European Muslim men and women become involved in a violent jihadist struggle abroad?

On the 25th of February, CTC researcher Daan Weggemans participated in a hearing of the permanent commission for social affairs and employment. During the hearing the issue of radicalization was discussed in two sessions. The first session gave members of parliament the opportunity to discuss the manifestations…

In recent decades, a more radical Islam has been on the rise in Indonesia, but the government now promotes a moderate form of Islam. In his inaugural lecture, Professor Nico Kaptein will analyse the dynamics of Islam and the influence of the Middle East in this the largest Muslim country in the world.…

Municipalities and security services actively monitor at least 160 radicalized Muslims in The Netherlands, as is shown in research by the Volkskrant. Terrorism expert Jelle van Buuren explained in the media.

As terrorism scholars, we are intrigued by those who engage in violence. We study their motivations, tactics, ideology, organisational structures, and pathways to (de-)mobilisation, hoping to better understand terrorism and how we can counter it. Far less attention is paid to what happens after an attack…

With the recent rise and fall of IS, academics and policy makers around the world are expressing concerns about the fate of children of former foreign fighters. Will they follow in their parents’ footsteps? In this paper, Layla van Wieringen, Daan Weggemans and Marieke Liem argue that in light of this…

In an op-ed and an interview in Dutch newspaper ‘de Volkskrant’, Reijer Passchier, Assistant Professor in Constitutional Law at Leiden University and Professor of Digitalisation and the Democratic Constitutional State at the Open University, stresses that Europe needs to take radical steps to tackle…

This dissertation is a collection of four research articles devoted to the study of Kummer theory for commutative algebraic groups.

Promotores: H.W. Lenstra, K. Belabas (University of Bordeaux)

This book discusses theories of crisis management and the radical right, to shed light on how responses to crisis influence radical right parties in their presence, discourse, and evolution. The book offers a comparative perspective by examining case studies with various traditions of radical right…

This study delivers a comprehensive picture of the causes of radicalization in the Eastern and Southeastern regions of Turkey. It demonstrates how regionally specific factors enable ideologically disparate terrorist groups to recruit and radicalize from the same population.

Speeches and speech acts have been crucial in settling the question at the centre of every political debate: who gets what, when and where?

An exploratory study on the role of family members of those who joined jihadist groups

When does radicalization not lead to terrorist attacks?

Since 2012, thousands of individuals have traveled from Western countries to join jihadist groups in Syria and Iraq. While much has been written about these individuals, only sparse attention has been paid to the social environment of these jihadist travelers and, more specific, the role of family members…

The Institute of Cultural Anthropology and Development Sociology (co)organises various events during the year.

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”.

Are you thinking about studying Crisis and Security Management: Terrorism and Political Violence ? Learn more and watch the videos.

Cultural Anthropology and Development Sociology at Leiden University studies the everyday practices of individuals and groups around the world in relation to the complex global challenges of diversity, sustainability, and digitalisation.

This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.

The

On 16 December 2019, Jan-Harm de Villiers defended his thesis 'The Anthropomorphic Hegemony of Subjectivity: Critical Reflections on Law and the Question of the Animal'. The doctoral research was supervised by Prof. P. Cliteur.

The Dutch women’s movement began around 1967 with the discussion of the disadvantages that women faced in daily life. In 1968 the MVM (Man-Vrouw-Maatschappij) was born and played an important role as a public voice demanding female education programs and inclusion in the workforce.

Cultural Anthropology and Development Sociology

Samir Negash, PhD candidate at Leiden University and Olaf van Vliet, Professor by special appointment Comparative Welfare State Analysis at Leiden University wrote a paper regarding the topic of immigration and the conditionality of unemployment benefits in OECD countries.

In the track Terrorism and Political Violence you will be familiarised with the academic debate regarding these contested concepts.

Astronomer and Marxist Anton Pannekoek was a remarkable figure. This book aims to study the connections between his life as a socialist theorist and as a pioneering scientist through the prism of Pannekoek's biography.

La radicalisation est devenue un mot désignant notre monde en couleurs négatives. Ce livre cherche à comprendre ce que c'est que la radicalisation au Sahel et aux Pays-Bas?

Terrorism experts Daan Weggemans (Leiden University) and Beatrice de Graaf (Utrecht University) conducted one of the first scientific studies on the societal reintegration of jihadist former detainees. They showed that the reintegration process isn't without problems. Their conlusions are presented…

On June 9-10 2016 Dr. E. Devroe of the Institute of Security and Global Affairs (ISGA) was invited as a key-note speaker on ‘Intelligence Led policing and community oriented policing’ at the annual meeting of the ‘Organization for Security and Co-operation in Europe’ (OSCE), Transnational Threats Department,…

The thesis presents a new perspective on Giovanni Girolamo Kapsperger (ca.1580-1651), who is nowadays only famous for his works for theorbo and lute, his remarkable output of vocal music of all genres being still mostly neglected from musicologists and performers.

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen

The material and intellectual presence of Egypt is at the heart of Western culture, religion and art from Antiquity to the present. This volume aims to provide a long term and interdisciplinary perspective on Egypt and its mnemohistory, taking theories on objects and their agency as its main point of…

This book examines how Muslim communities in the Netherlands perceive and experience extremism, counter-radicalisation policies, and Islamophobia.

This research note argues that the “lone wolf” typology should be fundamentally reconsidered.

Cathodic corrosion for producing nanoparticles was (re)discovered when trying to control the electrochemical etching of a scanning tunneling microscopy (STM) tip.

Most of current public-key cryptography is considered insecure against attacks from sufficiently powerful quantum computers. Post-quantum cryptography studies methods to secure information resistant against such attacks. One proposal is isogeny-based cryptography, which bases its security on computational…

'Politics of Withdrawal' considers the significance of practices and theories of withdrawal for radical thinking today.

The interdisciplinary AI & Society minor of Leiden University brings together students and lecturers from a wide range of disciplines. Together they look at the impact of AI on society.