This article provides a comprehensive analysis of the Islamic State's use of images taken by drones, drawing on a dataset of ISIS propaganda images from October 2016 to December 2018.

Refugees’ effect on domestic terrorism is conditioned by host-country social perception (attitude about living next-door to foreigners) and economic competition. These hypotheses are tested cross-nationally from 1995-2014 leveraging data from the World Values Survey.

Toch kan je volgens dr. Jelle van Buuren dader Tobias R. niet in een bepaald hokje plaatsen. Van Buuren is kenner van het rechts-extremisme en reageert in het Reformatorisch Dagblad op de passages van Tobias R.

The European Research Council (ERC) announced the awarding of 494 Starting Grants to young scientists across Europe. One of these scholars is Corinna Jentzsch, Assistant Professor of International Relations at the Institute of Political Science. She received this grant for her research project ‘Countering…

This thesis attempts to interrogate post-1991-2015 political development in Ethiopia, focusing on the political discourses espoused by the government and opposition, using the discourse analysis method and securitization theory.

A defining fixture of our contemporary world, video games offer a rich spectrum of engagements with the past.

On Thursday 11 November, Women in International Security Netherlands (WIIS-NL) held its inaugural webinar event on 11 November with four speakers in conjunction with the International Centre for Terrorism (ICCT) and the Chair UN Studies in Peace and Justice at Leiden University.

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.

The UK has recently been facing racist violence outbreaks. Tahir Abbas, Professor of Radicalisation Studies, discusses this in an article on Hyphen.

Nikki Sterkenburg, external PhD candidate at the Institute of Security and Global Affairs in The Hague, was interviewed by the NOS programme Nieuws & Co about the meeting of Thierry Baudet with Alt-Right movement Jared Taylor. 'If Baudet would have wished to stay aloof of this movement, he shouldn’t…

Rianne Scheerhoorn is a government trainee at the Ministry of Economic Affairs and Climate Policy and the Ministry of Agriculture, Nature and Food Quality. After completing her Bachelor's and Master's degrees in Public Administration, she was sure that the Central Government Traineeship Programme (Rijkstraineesprogramma)…

Alastair Reed, Assistant professor at the Institute of Security and Global Affairs (ISGA) is interviewed by Devex, the media platform for the global development community.

Dr. Mark Dechesne, associate professor at the Leiden University Dual PhD Centre (FGGA) will participate asas work package leader in a large new international project on radicalization among young people in Europe.

Vasiliki Kosta gave a presentation during the session ‘Building Academic Freedom’ taking place at Leiden University on 25 November 2025.

The Executive Board of Leiden University has asked the University Council to advise on its proposed decision to reactivate the person counters/sensors in due course. The Council will now look at this carefully before the Board makes a final decision. The advice of the University’s participation body…

The team of WIIS-Netherlands exists out of the board members and the advisory council.

The METIS instrument that’s being built for ESO's future Extremely Large Telescope (ELT) in Northern Chile under the leadership of the Dutch Research School for Astronomy (NOVA) has reached an important milestone: the preliminary design has been approved.

In the Master's programme Crisis and Security Management, you will study contemporary security challenges from both local and global points of view, gaining a deep understanding of the ‘wicked problem’ of security and crisis topics in a complex and globalising world.

In the Master's programme Crisis and Security Management, you will study contemporary security challenges from both local and global points of view, gaining a deep understanding of the ‘wicked problem’ of security and crisis topics in a complex and globalising world.

The combination of academic and professional skills taught in the CSM prepares you for a wide variety of careers in the rapidly expanding domain of security and crisis management, including public or private sector and policy-making positions.

In the Master's programme Crisis and Security Management, you will study contemporary security challenges from both local and global points of view, gaining a deep understanding of the ‘wicked problem’ of security and crisis topics in a complex and globalising world.

In the Master's programme Crisis and Security Management, you will study contemporary security challenges from both local and global points of view, gaining a deep understanding of the ‘wicked problem’ of security and crisis topics in a complex and globalising world.

In the Master's programme Crisis and Security Management, you will study contemporary security challenges from both local and global points of view, gaining a deep understanding of the ‘wicked problem’ of security and crisis topics in a complex and globalising world.

In the Master's programme Crisis and Security Management, you will study contemporary security challenges from both local and global points of view, gaining a deep understanding of the ‘wicked problem’ of security and crisis topics in a complex and globalising world.

This paper investigates possible convergence of issue salience of terrorism among citizens within the European Union for ten jihadist attacks in the period 2015–2017 using Eurobarometer survey data.

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

This article explores how ISIS and the Taliban have fostered support through their parallel legal systems.

Lecture

The combination of academic and professional skills taught in the CSM prepares you for a wide variety of careers in the rapidly expanding domain of security and crisis management, including public or private sector and policy-making positions.

The Hofstad group is known mainly because of Mohammed B., the murderer of Theo van Gogh. PhD candidate Bart Schuurman examined this Dutch jihadist group based on interviews and confidential police files. How and why did the group come about? What drove some of the group members to commit terrorist…

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…

Leiden scientists will be working on the development of a camera for the European Extremely Large Telescope that is currently under construction. On 28 September the Netherlands Research School for Astronomy signed an agreement with the European Southern Observatory.

On 12 September 2024, the official ceremony opening the academic year 24-25 for students of the European Law master’s programme took place at Leiden Law School, organised by the Europa Institute.

To what extent does exoplanet Proxima b resemble our Earth? And is there some form of life present? Astronomers hope to find answers to these questions with the new European Extremely Large Telescope (ELT). An NWO research grant of €18 million will allow a Dutch consortium to continue building instruments…

UnMiSSeD studies the interaction between misinformation and science in societal debates using a mixed qualitative-quantitative approach.

On Thursday 11 November, Women in International Security Netherlands (WIIS-NL) held its inaugural webinar event on 11 November with four speakers in conjunction with the International Centre for Terrorism (ICCT) and the Chair UN Studies in Peace and Justice at Leiden University.

Since the Middle Passage is in the North Atlantic, and the North Atlantic has a relationship with the arctic, what relationship does the Arctic have with the Middle Passage? How can this relationship be used to provide a space of healing by uncovering Afro/diasporic counter narratives?

The funerary textile tradition from the Osmore Valley, South Peru, and its social-political implications (2005)

The more than 370 sensors that have been hung up in Leiden University buildings to count the people present will not be switched on again. The equipment will eventually be removed from the buildings.

As a strategy and international security specialist, Julien Bastrup-Birk (41) has advised both NATO and the United Nations Office on Drugs and Crime and worked at the UK Foreign and Defence ministries. Next week, he will defend his PhD on clandestine non-state power in the international system.

This thesis is largely an experimental study on the formation of solid-state simple and complex organic molecules in the H2O-rich and CO-rich ice phases of dense interstellar clouds and dark cores.

Leiden University is organising two international conferences on security from 7 to 10 November in The Hague. Power relations, negotiating with extremists, cyber espionage, and the experience of a real crisis situation are some of the issues on the agenda. The conferences will be opened by Mayor Jozias…

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.

This project compares and explains dynamics of cross-border cooperation among European actors in the field of counterterrorism (CT).

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.

During post-embryonic development into adults, animals face an environment that fluctuates constantly. For example, in nutrient availability, temperature, and osmolarity (e.g., salt concentration).

In this article, Gerrit Dijkstra and Jos Raadschelders from the Institute of Public Administration, focus on Russia’s role in Bosnia and raise some important questions.

Promotor: Prof.dr. M.K. Richardson, Co-Promotor: F. Witte