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PhD defence C.S. van Nassau 2 July 2026 13:45 - 15:15

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The relational dimension of radicalization

Social media offers opportunities for identifying terrorism risks

Although people with radical ideas and sentiments are regularly a subject of public concern, only a small fraction ultimately becomes involved in crimes with a terrorist motive. Casper van Nassau’s research shows that insight into the social environment in which radical networks emerge can be of great value in better assessing risks.

According to Van Nassau, detailed knowledge of the relationships and positions within the network of individuals who are radicalizing provides important starting points for both prevention and enforcement. At an early stage, when there are signs of radicalization but activities are still taking place relatively openly, this knowledge can help take appropriate measures in a timely manner and prevent escalation.

Better understanding of the social environment
Even in situations where individuals are suspected of criminal offenses, insight into the contacts they maintain within the network plays an important role. Van Nassau points out that a better understanding of the social environment in which radicalization occurs can contribute to more effective interventions by the police and other relevant agencies.

At the same time, his research findings emphasize that intervention is not without risks. Measures aimed at countering radicalization or terrorism can have unintended side effects. For example, a network may become more cohesive, and the remaining members may become further radicalized.

The findings underscore the importance of taking into account the social environment in which radical networks operate when assessing terrorism risks. Knowledge of the interrelationships can contribute to more effective prevention and law enforcement.

More information about the dissertation

Programme

PhD defence by C.S. van Nassau

PhD Faculty of Law

Supervisors:

  • prof.dr. C.J. de Poot
  • prof.dr. F.M. Weerman

The PhD defence can be followed online as well

About PhD defence C.S. van Nassau

Starting date

  • 2 July 2026

Time

  • 13:45 - 15:15

Location

  • Hoofdgebouw, Aula

Address

  • De Boelelaan 1105
  • 1081 HV Amsterdam

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