The recent terrorist attacks in Europe are presumably not just acts committed by individuals, but acts facilitated by larger jihadist networks. But how do such networks operate? Understanding their modus operandi can be useful knowledge to counter terrorist threats.

This study focuses on increasing our understanding of the different pathways converts take during conversion to Islam.

The group structure of Jihadist networks changes rapidly, which makes it difficult to monitor them. This is the finding of research by criminologist Jasper de Bie. PhD defence 14 April.

What does the daily life of those who travelled to Syria to join jihadist groups look like? Destination Syria, a new ISGA report, provides answers to this question

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…

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

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

People who are arrested on suspicion of preparing an attack are at risk of becoming radicalised either during or after their detention. Whether or not to arrest someone requires careful consideration. At the end of the prison sentence, it is important to provide effective supervision of the reintegration…

PhD Defence

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…

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

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…

This dissertation studies how domestic regulatory agencies and the officials representing them are influenced by and deal with the increasingly complex transnational environments in which they have come to operate. Based on (social) network analysis it demonstrates how decisions of domestic agencies…

How do we address the pressing challenges posed by large-scale networks?

The Leiden Leadership Centre is an international and interdisciplinary network organisation connecting people and perspectives.

The Leiden Complex Networks Network (LCN2) aims at bringing together scientists from different disciplines, based on a common interest in both theoretical models and empirical analyses of networks and graphs.

For many system in statistical physics the microcanonical and canonical ensemble are equivalent in the thermodynamic limit, but not for all.

Modelling supra-regional communities in the early 3rd Millennium BC

Below you can find lists of Leiden-based and international organizations working on Central Asia, and an overview of useful resources on Central Asia.

The ‘Food citizens?’ project is assisted by an advisory board, consisting of academics and stakeholders.

LeiCenSAA is dedicated to the study of Ancient Arabia and the sharing of knowledge and expertise on this topic. Thefore it aims to collaborate closely with other research in the field.

The LGBT+ Network offers a platform for all lesbian, gay, bisexual, transgender and queer staff and students at Leiden University.

This dissertation consists of two parts, with the common theme

The focus of this programme is the inter-community social relationships and transformations of island networks in the Lesser Antilles across the historical divide.

Both within Leiden University and in the external partner universities PhD-research is conducted which is directly or indirectly related to regional integration.

Below you can find an overview of our network.

How and under what conditions Dutch primary school principals' managerial networking activities affect the performance of their school

In this thesis, we extend the concept of null models as canonical ensembles of multi-graphs with given constraints and present new metrics able to characterize real-world layered systems based on their correlation patterns.

LIAS researchers working in the field of linguistics hold dual appointments in LIAS and the Leiden University Centre for Linguistics (LUCL).

Promotor: R. Tijdeman, Co-promotor: H.J.J. te Riele

The Leiden Computational Network Science Lab (CNS Lab) researches methods for knowledge discovery from real-world network data.

The Global Abolitionisms Network is an international network of scholars working on antislavery activism and abolitionism.

This thesis seeks to combine two different research topics; Multi-Objective Optimization and Complex Network Analysis.

The Young Alumni Network is specifically for young alumni (35 years and younger) living in the Netherlands, who have recently graduated and are at the start of their career. As a young alumnus you have different needs than when you are settled in your career path or when your career is drawing to a…

The active learning network joins together everyone interested in the subject to move the theme further within Leiden University. The SALTSWAT pilot program researches the ways forward for Leiden University.

The D&I Expertise Office is in close contact with various student and staff networks regarding diversity and inclusion.

The Leiden University Sustainability Network is the platform for Leiden University staff to combine their efforts and support each other in making our university more sustainable.

The Global Abolitionisms Network has been established to link scholars from across the world and across disciplines who are working on antislavery activism and abolitionism.

The State & Society network critically interrogates the assumption that state and society are a priori conceptual and empirical objects.

Leiden University actively seeks to prepare students for the labour market and wants to help young alumni at the start of their careers. For this we like to use the knowledge and experience of Leiden alumni. To bring these students and young alumni who have questions about their career in contact with…

This research concerns a network of labour law specialists in the EU. The growing internationalization of the economic market and the employment market has a major impact on legislation and research of labour law. Particularly within the European Union labour law is subject to constant development…

Sophia aims to create equal opportunities and promote a better working climate for female academic staff at Leiden University.

Leiden University collaborates with several universities and institutes in the world.

Business & Law Research Network (BLRN) is a multidisciplinary research and expertise network that focuses on a variety of aspects of doing business within the context of company and insolvency law.

Promotor: A.W. van der Vaart

The Anthropology and Sociology network brings together researchers of LIAS and LUCSoR working from an anthropological and sociological perspective and researchers of the Faculty of Social and Behavioural Sciences.

Religion, Philosophy, and the Pre-modern World