Environmental scientist Rutger Hoekstra addressed the General Assembly of the United Nations on 12 April. And that’s quite a big thing to do. How do you get there as a scientist? And, more importantly, what was his message? In eight questions, Rutger explains what he does and why.

In his new book 'The Politics of Borders', Leiden political scientist Matthew Longo redefines the concept of a ‘border’.

People come to court because of a legal dispute, and often think that the court decision will also resolve the underlying conflict. But that is not always the case. ‘Court decisions should provide a better response to the needs and the nature of citizens,’ argues professor by special appointment Rogier…

From 16 to 20 June 2025, the Institute of Security and Global Affairs of Leiden University hosted the annual Summer School The European Union, the United Nations and Global Governance in The Hague. The programme brought together recent graduates, PhD students, and young professionals from a variety…

What role(s) do border officials play in the enforcement and management of border control and border mobilities and how do these roles relate to the personal, organisational and larger societal context within which these officials operate?

Lecturer Andrew Gawthorpe of Leiden University discusses in The Conversation the growing influence of far-right activist Laura Loomer in Donald Trump’s administration.

Aleydis Nissen discusses her new book, The European Union, Emerging Global Business and Human Rights.

Originally from Romania, Catalin Popa has been working at our Faculty as a Postdoc for two years now. He is a landscape archaeologist with a deep interest in the role of archaeology in society. “We should also produce a message for non-academics. One that is shaped for people that don’t have the time…

Krekels received both the Thesis Award and the TOP Publication Award for her thesis 'Size does matter: drug glucuronidation in children'. Her research led to a new dosage regimen of morphine for babies and toddlers. Both prizes were awarded during the scientific meeting of the NVKFB on Friday 11 Apr…

Psychologists Marieke Tollenaar, Anne Miers and Esther van den Bos received donations from the Leiden University Fund and Stichting Praesidium Libertatis to take crucial first steps in research projects that may eventually contribute to the well-being of vulnerable youth.

Between 11 and 13 September 2025, the ESIL Annual Conference took place in Berlin, Germany. This year's conference unfolded on the theme 'Reconstructing International Law', attracting an unprecedented number of legal scholars from all over the world.

Marta Fiocco, professor at the Mathematical Institute, has received a grant for predicting survival outcome and improving the balance between prognosis and quality of life for soft tissue sarcoma patients (Personalised Sarcoma Care).

Dr. Gruni was invited by the Society of International Economic Law (SIEL) to join their PEPA conference which will be held in Tilburg on the 20th and 21st of April.

Hermen Overkleeft and his colleagues Gideon Davies (University of York) and Carme Rovira (University of Barcelona) will receive a 9.1 million euros Synergy Grant from the European Research Council. Together, they will form the Carbocentre Synergy team for research into enzymes that work on glycans:…

Debate, Panel and Q&A session

The European Commission sees increased labour migration as a solution to the growing personnel shortages, but the Dutch Labour Inspectorate argues that this is not a tenable business model. Professor of Economics Olaf van Vliet discusses the advantages and disadvantages of labour migration for the economy…

Wars, climate change and the effects of covid have caused a global decline in children’s well-being. In her inaugural lecture Ann Skelton, Professor of Children’s Rights in a Sustainable World, points to the disastrous effects of multiple interacting crises.

From 1967 to 1982, the United Nations undertook several peacekeeping operations in the Middle East. In his thesis from the Institute for History, Diego Salama examines how these operations were connected and their impact on the region.

De Leidse student Noah Madretsma heeft de finale gehaald van de verkiezing voor VN-jongerenvertegenwoordiger Mensenrechten en Veiligheid. Wie is hij en waarom wil hij VN-jongerenvertegenwoordiger worden? Tijd om eens kennis te maken.

Hit the brakes! That’s the advice of the Council for Public Health and Society in a recent report. Eight psychologists share their insights on how to slow down and reconnect.

To what extent is it possible to utilise traditional and new media data to examine and understand the nature and scope of homicide in Indonesia?

Who was professionally involved in language between 1550 and 1650? And what were the financial returns of this language sector? Assistant Professor Alisa van de Haar has received an ERC Starting Grant to map out the situation in Northwest Europe between 1550 and 1650.

Lecture, INVISIHIST event

Diplomatica addresses the broad range of work being done across the social sciences and the humanities that takes diplomacy as its focus of investigation. The journal explores and investigates diplomacy as an extension of social interests, forces, and environments.

You may know it by the umbrella term 'citizen science'. You may also use terms such as volunteer mapping, patient co-researcher, or even community engaged learning to describe participatory practices in your research or teaching. No matter what you call it, there’s plenty going on when it comes to this…

The child benefits scandal caused significant harm to families. The independent Hamer Commission specifically investigated the link between the scandal and the removal of children from their homes. Public Administration student Benito Walker was a member of this commission and shares his experiences…

In academia, the mention of Wikipedia might be met with suspicion. However, for Tsolin Nalbantian, university lecturer Modern Middle Eastern Studies, the encyclopedia is an opportunity to broaden the skills of her students and to increase public knowledge. She received a Teaching Comenius Fellowship…

Simulation project EAGLE has won the 2022 Group Achievement Award of the Royal Astronomical Society. EAGLE is a large collection of simulations about the formation of galaxies. The largest simulation contains as many as 6.8 billion particles and took months to calculate on the world's fastest superc…