The authors detail the transnationality of terrorist organisations, including fundraising, communications, alliance-forming, movement and target selection.

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When a star is born in our Galaxy, it is quite likely that it has formed within a massive cluster, which hosts numerous high-mass stars bathing their lower mass neighbours in UV radiation.

This project focuses on a striking parallelism between two macro-groups of languages: southern Italian dialects and the so-called split-ergative languages, like Basque, Georgian, Dyirbal, Hindi/Urdu.

Comparative and Dutch Politics is one of the three organisational clusters of the Institute of Political Science.

Promotor: D. Bouwmeester, Co-promotor: D. Kraft

Following the Big Bang, structure in the Universe started collapsing under the force of gravity. This resulted in the formation of the first stars, galaxies and clusters of galaxies.

In this article for Studies in Conflict & Terrorism, the authors analyse the evolution and interplay of national policies and international diplomacy on cyber terrorism within and across the UNSC’s permanent five members and the UN process on cyber norms (GGE and OEWG).

Streptomyces bacteria are a valuable source of natural products, many of which are used in the clinic or in biotechnology.

These three repors are part of a research project that assesses how military interventions can best prepare the ground for an effective long-term counter-terrorism policy. Three different cases have been studied, and they have each provided the input for the policy relevant recommendations that are…

How have British, Dutch, and German security services dealt with political violence and terrorism since the late 1960s; to what extent did they consider these new phenomena as a task and how have they developed activities in order to counter these security threats?

On October 31st, Margarita Gulian succesfully defended her doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Margarita on this great result.

Comparing terrorist attacks with falling off a step ladder is absurd, writes Jeanine de Roy van Zuijdewijn in NRC Handelsblad on 27 September 2017.

This collection includes six short policy-focused contributions exploring how legislation and policy on counter cyber terrorism unfold at the national level in the United States, the United Kingdom, China, Russia, France, and at the regional level of the European Union.

The book addresses the question “How and why do people become involved in European homegrown jihadism?

Self-censorship violates principles of a free society but few people want to take the role of the martyr.

In this thesis,

PhD defence

In this article, Yannick Veilleux-Lepage and Tommy van Steen, assistant professors at the Institute of Security and Global Affairs, discuss the degree of consensus within the field of terrorism studies regarding the impact of the COVID-19 pandemic on the activities of violent non-state actors.

From the research Terrorist threat in the Netherlands, the risk perception and opportunities for risk communication (Leiden University) shows that the Dutch respond relatively sober to attacks in neighboring countries and the possible risks of a terrorist threat. Half of the respondents believe that…

This report examines the questions

Academic research on terrorism is getting better all the time. This is the conclusion of university lecturer Bart Schuurman after studying 3,442 articles. He published his study in Terrorism and Political Violence.

Jeanine de Roy van Zuijdewijn teaches the masterclass terrorism 2018 together with Edwin Bakker. Read the interview here.

The MOOC Terrorism and Counterterrorism: Comparing Theory & Practice by Prof. Edwin Bakker, co-developed by the Centre for Innovation, has now attracted over 100,000 participants. It is the first MOOC of Leiden University to reach this magic number.

Starting from September, the four Dutch mathematics clusters DIAMANT, NDNS, GQT and STAR will each be given 1 ME from NWO Exact Sciences, to be spent within a period of two years.

Are terrorist suspects willing to reintegrate back into society? Can they reintegrate?

In this article, Bart Schuurman and Sarah Louise Carthy conduct further research into the understanding of the causes of terrorism by assessing differences and similarities between left-, right- and jihadist extremists and terrorists. The article draws on the Analysen zum Terrorismus, one of the most…

In this article, Jeanine de Roy van Zuijdewijn and Edwin Bakker provide a big picture reflection on two decades after 9/11 in Western Europe.

You can find more information on the Dutch webpage. Click on the “Nederlands” button above.

This paper contributes on an increasing body of work on radicalisation. It specifically focuses on what distinguishes individuals whose behavioural radicalisation includes involvement in terrorist violence from those whose behavioural radicalisation does not.

This article presents an in-depth evaluation of a specialized reintegration initiative within the Dutch Probation Service focused on individuals convicted or suspected of involvement in terrorism.

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?

Professor Edwin Bakker, director of the Centre for Terrorism & Counterterrorism, released his new book “Terrorism and Counterterrorism Studies: Comparing Theory and Practice”, published by Leiden University Press.

ALICE is Leiden University's newest computing miracle. The computing cluster is a first step in the development of infrastructure for computational and data-intensive research that is accessible to everyone within Leiden University and the LUMC. This includes both experienced users of high-performance…

In this article, Tokdemir & Klein examine the strategic actions of governments against domestic terrorist groups and domestic terrorist groups’ reactions to such actions.

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

You can find more information on the Dutch webpage. Click on the “Nederlands” button above.

One of the most important puzzles in modern astrophysics is the nature of dark matter.

You can find more information on the Dutch webpage. Click on the “Nederlands” button above.

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

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

Scholars have long debated the intentions of the Muslim Brotherhood in the Middle East. Some claim the organization supports terrorism, while others believe it is a positive force for democratization.