This study assesses nationwide, disaggregated trends in homicide rates over a 25-year period. Using a unique, detailed dataset, spanning a quarter of a century of homicide data allowed Aarten & Liems to assess type-specific homicide trends and the relationship between gender and age within these tre…

Acquiring and maintaining public support is frequently cited as an important requirement for governments fighting non-state actors. But how exactly can public support influence the course of counterterrorism campaigns and thereby contribute to an escalation or de-escalation of violence?

Social resilience and security has never been more important. Over the last 2 years, the COVID-19 pandemic has created a considerable disturbance to our personal and social lives. As a result, the general population reports more stress, loneliness and decreased quality of life. At the same time, there…

This book contextualizes the use of terror as part of wider movements of political contention, demonstrating that terroristic innovation occurs as part of wider historical processes rather than in a vacuum.

This study is a critical discourse analysis of the misogynistic narratives shared by three incel violent extremists.

n an increasingly complex and security-challenged society, the CSM programme, Governance of Violence, provides you with the theoretical and practical skills to understand the issues underlying security challenges and develop solutions for crisis and security management.

In an increasingly complex and security-challenged society, the CSM programme, Terrorism and Political Violence, provides you with the theoretical and practical skills to understand the issues underlying security challenges and develop solutions for crisis and security management.

This research project explores themes related to the system of close protection and surveillance (Dutch: bewaken en beveiligen) in the Netherlands.

Find out how the admission procedures for PhD candidates at LUCAS are structured.

Starting 1 January 2026, an annual administrative fee will be charged for all external and externally funded PhD positions. More information will follow in Fall 2025.

Different PhD tracks are available for different types of PhD candidates.

Conference

Intergenerational transmission refers to the complex and dynamic process with which values, ideas and behaviors are transmitted across generations. We are specifically interested in the intergenerational transmission of behaviors and beliefs that might result in harm to the individuals involved or society…

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

This article provides an in‐depth assessment of lone actor terrorists’ attack planning and preparation.

Can behaviour in an online economic game be understood as a representation of radicalisation propensity?

This research paper seeks to examine the nature of the nexus between right-wing extremism and the military by surveying five potential consequences (i.e., problem areas) arising from the presence of right-wing extremists within the armed forces of twelve Western countries.

The Institute of Security and Global Affairs (ISGA) is a scientific institute that specialises in security issues.

In this publication, the authors explore the reality of accessing and interviewing hard-to-reach populations such as extremists and terrorists

Find out how to apply for Crisis and Security Management at Leiden University by following our step-by step guide.

The minors offered by the Faculty of Governance and Global Affairs in The Hague are closely linked to the defining image of The Hague as a city of international justice, peace and security as well as the centre of Dutch public administration and international governance.

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?

PhD Programme of the Institute for History

Until recently, the role of external information processing in intelligence has rarely been investigated quantitatively or experimentally. A group of researchers from Erasmus University Rotterdam, Leiden University, GGZ Rivierduinen, and University of Edinburgh measured in a new way how and when people…

LUCAS offers education, guidance, and development opportunities to PhD candidates researching the relationships between the arts and society, in fields aligned with one of our three research clusters. We are strongly committed to high-quality, innovative research conducted with integrity. The Institute…

The Institute of Security and Global Affairs (ISGA) in The Hague offers bachelor’s and master’s programmes, minors, and research in security studies, covering cybersecurity, terrorism, diplomacy and contemporary security challenges. Focus keywords: ISGA, bachelor, master, minors, research, security…

Lecture

Western thought has often dismissed shadows as fictional, but what if fictions reveal original truths?

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

In 2012, the Dutch National Coordinator for Security and Counterterrorism and the Dutch Probation Service launched a reintegration project for offenders on probation or parole who were (suspected to be) involved in jihadist extremism or terrorism. The initiative's primary goal was to reduce the chance…

Schuurman examines how Russia is escalating its covert operations against European countries.

The second and final report on the Netherlands‘ crime-terror nexus has analysed all fourteen profiles of individuals arrested in 2015 for offences of terrorism.

The term “Lone Actor” has been applied to a variety of violent individuals who are thought to act out of ideological motivations using terrorist tactics.

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…

This research examines how right-wing extremist parents perceive and discuss their role in the ideological socialisation of their children.