On 17 August 1945, two days after the Japanese surrender that also brought an end to the Second World War in Asia, Indonesia declared its independence. The declaration was not recognized by the Netherlands, which resorted to force in its attempt to take control of the inevitable process of decolonization.…

This book presents an understanding of the concept of Countering Violent Extremism from a critical terrorism studies perspective using case studies from different countries while examining the issues it raises.

The illegal use of hand grenades has generated a lot of public interest over the last few years but very little is known about the nature and extent of these incidents. This research project is trying to fill that gap.

This paper critically compares seven widely used risk assessment tools for violent extremism, including the VERA-2R, the ERG 22+, the SQAT, the IR46, the RRAP, the Radar, and the VAF.

Understanding the evolving landscape of extremism in the 21st century.

The Research Group 'Violence and Violence Prevention' studies interpersonal violence. We seek to better understand the dynamics underlying interpersonal conflict.

Research on lethal violence related to criminal activities.

Dutch troops, judges and politicians collectively condoned and concealed the systematic use of extreme violence during the Indonesian War of Independence. Historians have now shown how this could happen. ‘It was scandal management rather than prevention,’ says Leiden historian and research leader Gert…

Marieke Liem, Associate Professor, at the Institute of Security and Global Affairs, was interviewed by RTL Nieuws on Tuesday morning 27 August about the increase in violence with illegal hand grenades in the Netherlands.

This online advanced summer programme of Leiden University and ICCT focuses on the field of preventing, detecting and responding to violent extremism and gives insight in the opportunities and challenges of various approaches.

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.

Firearms and violence in Europe–A systematic review by Katharina Krüsselmann, Pauline Aarten, Marieke Liem

This online advanced summer programme, organised together with the International Centre for Counter-Terrorism – The Hague (ICCT), provides insight into the opportunities and challenges of various approaches to prevent, detect and respond to violent extremism.

How many men and women die per year at the hands of others? What are the motives behind these killings? Are there as many homicides today as years ago? How can we explain the rise and fall of homicides over time? And: What is the influence of (early) childhood and adolescence on the likelihood to commit…

In the track Governance of radicalism, extremism and terrorism you will be familiarised with the academic debate regarding these contested concepts.

Under what circumstances do paramilitary groups limit their use of political violence? This article examines the use of political violence by the PIRA.

In this minor programme, students will become familiar with the nature and scope of violence; the ways in which it impacts public order, and the ways in which society can respond to and, ultimately, prevent violence.

Project TARGET aims to improve our understanding of gun violence in Europe and the relationship between gun violence and firearms trafficking.

What is the nature and scope of violence? Who offends, and in what context? Who are the victims? And how can we design suitable intervention and prevention strategies? In this track, you will be familiarised with the many faces of violent offending, to provide the knowledge and tools to understand,…

In this project, we seek to assess, map and understand the risk factors associated with fatal domestic violence.

Can conspiracy constructions explain for hatred of the system? And if so, should conspiracy constructions be considered to be a risk in terms of national security?

Representations of violence are often said to generate cathartic effects, but what does “catharsis” mean? And what theory of the unconscious made this concept so popular that it reaches from classical antiquity to the digital age?

Examining mediation and moderation.

The judge as a problem-solver in domestic violence cases involving child victims.

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

This study focuses on violence involving juveniles in conflict with the law who are deprived of their liberty in different institutions within the framework of the (juvenile) criminal justice system (inter alia, police detention, pre-trial detention and deprivation of liberty after conviction or sen…

The aim of this project is to study what makes an act or form of violence a specifically political reality.

This article describes the phenomenon of firearms violence and the importance of including non-lethal firearms violence in understanding this phenomenon.

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…

To assess the impact of illicit firearms trafficking on gun violence, this research looks at the scope, characteristics and contexts of firearm violence, and also the scope and nature of firearms trafficking in Europe since the new millennium. Nils Duquet, Dennis Vanden Auweele and Marieke Liem created…

What are the mechanics of soft materials (e.g. foam, sand)?

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Investigating neurobiological endophenotypes of Social Anxiety Disorder

In the last two decades, there have been heated public and scholarly debates in France, the United Kingdom, and the Netherlands on the violent end of empire. Nevertheless, the broader comparative investigations into colonial counterinsurgency tend to leave atrocities such as torture, execution, and…

On 29 September 2020, Tom van Ham defended his thesis 'Collective violence offenders and offending. The role of individual characteristics'. The doctoral research was supervised by Prof. A.A.J. Blokland, Prof. O.M.J. Adang (RUG) and Prof. Th.A.H. Doreleijers (VUMC).

On Tuesday 23 May 2017, Jasmina Mackic defended her doctoral thesis ‘Proving discriminatory violence at the European Court of Human Rights’. The supervisor of the research is Vice Dean and Professor of Public International Law Larissa van den Herik. A brief summary of her thesis is provided below.

Representations of violence have subliminal contagious effects, but what kind of unconscious captures this imperceptible affective dynamic in the digital age?

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

French title: Communication et violences dans le Guéra et le Moyen-Chari (Tchad) de 1940 à 2010. This research investigates the relationship between the introduction of new means of communication and violence experienced by the local populations in the Moyen-Chari and the Guéra regions in Chad from…

The position of child victims, globally and in Liberia and their right to physical and psychological recovery and social reintegration covered by art. 39 CRC.

This article written by Marieke Liem & Alexander Kamprad investigates the relationship between terrorism and interpersonal violence. They conducted cross-national analyses on the effects of terrorism mortality rates on homicide rates. Results showed that terrorism appears to be robustly and positively…

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This research examines the social, political, and cultural forces that structure people’s responses towards accented speech, and further uses the accent as a focal point to theorize the interrelation between language and body.

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

PhD defence

Behavioral Sciences Mental Health Psychological Disorders - Adult Aggression in Adults Psychological Science Social Psychology Criminology & Delinquency Social Sciences Criminology and Criminal Justice Crime and Crime Prevention Criminal Behaviour and Forensic Psychology Violent Crime Law Criminology…

Research goal: To support the design of technologies (counter-measures and communication measures) for the prevention, interdiction and mitigation of lone actor extremist events (LOEEs), which are hard to anticipate, yet can be highly damaging to local and national communities and therefore must be…