After a career spanning decades in intelligence services, Berrie Hanselman could have simply retired, but he chose not to. The Achterhoek native decided to continue and even earn a PhD on his subject: left-wing extremism. Gaining insight into the life of the left-wing activist who does not shy away…

The brain structure of young people with conduct disorder differs significantly from that of their typically developing peers. This is the conclusion of an international study that analysed more than two thousand MRI scans, recently published in The Lancet Psychiatry. Dr Moji Aghajani, one of the principal…

Dutch troops, judges and politicians collectively condoned and concealed the systematic use of extreme violence during the Indonesian War of Independence. Historians have now shown how this could happen. ‘It was scandal management rather than prevention,’ says Leiden historian and research leader Gert…

‘Countering violent extremism – the international deradicalization agenda’ is the name of the book Tahir Abbas published last month. In this interview the associate professor in Terrorism and Political Violence at ISGA tells about the backgrounds and goals of the book.

On 7 and 8 November 2024, the International Centre for Counter-Terrorism (ICCT), the Institute of Security & Global Affairs at Leiden University, and The Netherlands’ National Coordinator for Security and Counter Terrorism (NCTV) partnered to host a ‘Blue-Sky’ Terrorist Exploitation of Artificial…

During an inspiring meeting at the Health Campus The Hague on 2 April, Jan Anthonie Bruijn and Jet Bussemaker reflected on their experiences in politics and looked ahead to the future of Dutch healthcare.

Tahir Abbas was named full professor of radicalization studies by the Executive Board. This chair, according to Abbas, is an excellent opportunity for ISGA to broaden its current focus on terrorism and political violence. Abbas was interviewed about his ambitions, writing as a form of relaxation, and…

Study information

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)…

Assistant professor Vincent Chang spoke in various media outlets about the Chinese commemoration of World War II.

In an article for East Asia Forum, University Lecturer Vincent Chang sheds light on China’s ambition to globalise its pantheon of national heroes.

On Tuesday 30 September 2025, PhD candidate Jonathan Collins will defend his dissertation A Wolf in Sheep’s Clothing: A Mixed-Methods Analysis of the Far-Right Alt-Tech Social Media Movement in Leiden’s Academy Building. His work examines the communication dynamics of far-right communities on alternative…

For already two years, Vincent Niochet has been affiliated with the Leiden Faculty of Archaeology as an external PhD candidate. Now, he has been awarded an NWO PhDs in the Humanities grant, allowing him to continue his research as a paid PhD staff member. ‘The past two years have been quite challenging,…

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

Jeanine de Roy van Zuijdewijn, researcher and lecturer at ISGA, was a guest on NPO Radio 1 where she discussed the attacks carried out in 2011 by Anders Breivik.

Nerve pain is one of the most common side effects of chemotherapy. It is therefore one of the biggest reasons for cancer patients to stop treatment early. Darcy Reynolds worked on new drug candidates against this pain during her bachelor's thesis. She developed a new series of molecules that increase…

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 academic year is coming to an end, and the summer break is approaching. FGGA students are working hard to complete the final stretch. We asked them how they look back on the past year and what tips they would like to share with fellow students.

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.

Lecture

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…

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.

A particular group of counter protesters have been sighted at numerous Black Lives Matter protests that were held in the United States. An extreme right movement known for its characteristic Hawaii Shirts and heavy weaponry that calls itself the Boogaloo Boys. Which is cause for concern among the American…

Education

Dr. Joana Cook and Dr. Graig Klein, assistant professors at the Institute of Security and Global Affairs of Leiden University, have been awarded a Google Trust & Safety Research Award for their project Countering Violent Extremist Content Online: A Multidisciplinary Approach.

Book presentation

Jeanine de Roy van Zuijdewijn, PhD candidate at ISGA, explained the dilemma countries face in the aftermath of terror attacks.

Festival

Whilst 2020 has been an unusual and taxing year for colleagues at the Institute of Security and Global Affairs (ISGA), the Institute nevertheless can look back on an impressive range of successful grant applications during the previous year. This impressive result was achieved on top of excellent results…

Hybrid Workshop: In person and online on 26 – 27 January 2023.

All students in the Netherlands are invited to take part in the National Student Survey (NSE) once a year. Via the NSE you can give your opinion on the positive aspects of your study programme, as well as what you think could or should be improved.

President Donald Trump’s decision to freeze U.S. foreign aid is raising concerns about ceding global influence to China. The Associated Press explores how this shift could weaken America’s soft power, traditionally used to build alliances and counter adversaries.

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

When writing a thesis or paper you must make good use of the insights you have gained during your lectures and studies so far. You should also refer to relevant literature and carry out your own research on the topic.

Course and exam enrolment

Course and exam enrolment

Course and exam enrolment

Course and exam enrolment

Course and exam enrolment

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A suitcase as a messenger of quantum science. That is the idea behind QuanTour, a project connecting researchers from 12 European universities. In December, the suitcase landed in Leiden. A month later, it is time to pass the baton to Copenhagen. But what happened to it in Leiden?