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

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

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.

Jeanine de Roy van Zuijdewijn, Chelsea Daymon and David Malet, wrote RESOLVE Network Research Report that examines career foreign fighters who have traversed from one insurgency to another.

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…

Terrorist groups adapt to environmental changes to maintain power. This project provides new insights by developing a theory of strategic target selection and using big data analytics and machine learning to test these hypotheses.

Why do communities form militias to defend themselves against violence during civil war? Using original interviews with former combatants and civilians and archival material from extensive fieldwork in Mozambique, Corinna Jentzsch (Leiden University Institute of Political Science) explains the timing,…

No evidence found that increasing migration leads to an increase in politically and ideologically motivated criminality. Migration flows have, however resulted in increased polarisation in the Netherlands.

Joana Cook talks about the Islamist parties increasingly taking power in the last four decades on ABC News.

Students taking the new bachelor’s course ‘Social Movements and Political Violence’ are about to do something new. In addition to studying textbooks and academic articles, they will actively work with multimedia materials and engage in online storytelling. Course instructor Corinna Jentzsch (Leiden…

Wouter Linmans is working on a PhD thesis on visions and fears of future warfare in Dutch society (1918-1939).

Security in the broadest sense of the word was the key focus in the Interfaculty Conference on 4 April in Leiden. With almost 200 attendees and such well-known speakers as Dick Schoof, Pieter van Vollenhoven and Ad Verbrugge, the first conference was a success.