Please read the terms and conditions carefully before registering.
As we navigate an increasingly complex and unstable global environment, the threat of terrorism and (violent) extremism remains a persistent challenge. The Islamic State (IS) and its affiliated groups remained the deadliest terrorist organisation globally in 2024 (Global Terrorism Index 2025). The Sahel remains the region most impacted by terrorism, while Niger, Pakistan, Russia and Iran recorded the largest increases in deaths caused by terrorism in 2024 (Global Terrorism Index 2025).
In the West, lone-actor attacks are increasing, often less complex but far harder to detect and prevent (EUROPOL Terrorism Situation and trend Report 2025). Many perpetrators are no longer driven by clear ideological commitments, instead acting on personal grievances, psychological vulnerabilities, or a mix of both which blurs radicalisation pathways and complicates prevention efforts. At the same time, the radicalisation of young people is becoming a growing concern, as minors are particularly exposed and vulnerable in today’s digital environment (Global Terrorism Index 2025; EUROPOL Terrorism Situation and trend Report 2025). Online spaces, characterised by anonymity, closed networks, and easy access to extremist content, accelerate radicalisation, especially among youth and psychologically vulnerable individuals (EUROPOL Terrorism Situation and trend Report 2025). New technologies further intensify these risks, with generative AI increasingly used to produce and spread extremist propaganda, particularly in right-wing extremist circles, and cryptocurrencies continuing to facilitate terrorism financing (EUROPOL Terrorism Situation and trend Report 2025).
Across the world, terrorist and violent extremist activities have continuously triggered an increase in security laws and measures. To prevent terrorism and violent extremism as early as possible, states have grappled with defining terrorism and proscribing terrorist and extremist organisations, introduced early prevention mechanisms, and expanded domestic and international legal and policy toolkits to counter the ever-developing threat posed by terrorism and violent extremism. Are these measures lawful, legitimate, and proportionate to their impact on the rule of law and human rights? What are the future threats, and how can they be countered while respecting the rule of law and human rights?
About the programme
The 16th edition of our renowned summer programme will bring you inspiring and thought-provoking lectures by leading experts in the field, interactive sessions, in-person study visits, group discussions (under the Chatham House Rule), and panel presentations. You will also have the unique opportunity to network with fellow professionals in the field: based here in The Hague and further afield.
This programme is co-organised by the Asser Institute and the International Centre for Counter-Terrorism.
Topics will include
- Definitional debates
- Pathways to extremism and terrorism
- Youth radicalisation
- Transnational Repression
- Victims of terrorism
- Online radicalisation and regulation of online spaces
- Countering the financing of terrorism
- Terrorism and conflict zones
- The use of Artificial Intelligence for (violent) extremist and terrorist purposes
- Latest trends in the development of counter-terrorism laws and policies at the international and European level
- The role of the rule of law and human rights law in countering terrorism and violent extremism
The list of confirmed sessions will be updated regularly as more speakers and topics are finalised, so be sure to check back for the latest updates!
Who should attend?
- Practitioners
- Diplomats
- Academics
- Civil servants
- Policymakers
- PhD candidates and advanced students
- Security services
- Professionals in the NGO sector
- National and international experts
This programme is coordinated by Dr Niki Siampakou, researcher at the Asser Institute. She is part of the Asser Institute's research strand 'In the public interest: accountability of the state and the prosecution of crimes'.
Alumni have said about previous editions of the summer programme:
“I would surely recommend it as it offers a wide spectrum of experiences combined with academic research and career-relevant practices. It provides both theory and practice whilst encouraging reflection on the future.” (2025 edition)
“The course challenges the way you think and exposes you to countries and professionals that have different perspectives on the same issues and threats I deal with.” (2024 edition)
“A very good choice to acquire background knowledge on the political and legal framework of terrorism, violent extremism and counter-terrorism in the EU/international contexts. Also relevant for tech professionals working in the sector of trust and safety and policy - if you're looking for crisp thinking, the most updated findings, and research in the area of online terrorism and violent extremism.” (2023 edition)
“Very inspiring, great networking opportunity and a lot of food for thought. Had an amazing week!” (2022 edition)
After completing this summer school, you will receive a certificate from the T.M.C. Asser Instituut and the International Centre for Counter-Terrorism.
Contact
If you have any questions about the training course, please send us an email at educationtraining@asser.nl. We will try to respond within two business days.
Interested?
Registration for this course is now open.
If you are interested in this course but cannot join us this year, please fill out this form to stay informed about future editions and upcoming enrollment dates.