The second and final volume of this co-authored study has just been published by J.B. Metzler. This second monograph explores the history of the concept of barbarism in the twentieth and twenty-first centuries.

Barbarism: from the 18th century to the present.

The Leiden University Europe Hub approaches Europe from a broad and inclusive perspective.

PhD defence

Human language is constantly evolving with its linguistic structure being shaped by language users at both individual and population levels. Focusing on the interplay between processes of language acquisition and communicative need in shaping human languages, this thesis introduces a novel computational…

The infection rate is rising again in the Netherlands, which means it may also be rising among Leiden University’s students and staff. How is the University responding? And what dilemmas is it facing? We spoke to our Rector Magnificus, Chief Security Officer and two other administrators.

One of the ambitions of the Learning@LeidenUniversity vision on teaching and learning is to foster an international and inclusive educational community in which everyone feels welcome, regardless of religion, sex, sexual orientation or cultural background. One student service that promotes inclusion…

How are stars and planets formed? Is life outside Earth possible? These questions are being researched by Professor of Molecular Astrophysics Ewine van Dishoeck at Leiden University. Her pioneering work has earned her the Kavli prize in the category of astrophysics. The prize consists of 1,000,000 dollars…

Arts and culture

Over recent years Leiden University has taken some significant steps forward in innovation in teaching and learning and in diversity. But there is still a lot to be done. These were the comments by governors, lecturers and scholars during the farewell seminar for Vice-Rector Simone Buitendijk on 27…

Does the university invest into fossil fuels? ⠀

Promotor: C.J. ten Cate

Teachers of English as a foreign language in China and the Netherlands have different notions of themselves as teachers in relation to cultures associated with the English language.

Promotor: G.P. van Wezel

The authors aim to provide insight into the way in which frontline officials in teams employ leadership behaviour aimed at creating public value.

In ‘Dimensions of Free Speech’, Devrim Kabasakal Badamchi (Leiden University Institute of Political Science) offers a new theoretical framework for free speech by critically analysing the major justifications for free speech. Kabasakal Badamchi argues for a justification: namely the double-grounded…

With the recent rise and fall of IS, academics and policy makers around the world are expressing concerns about the fate of children of former foreign fighters. Will they follow in their parents’ footsteps? In this paper, Layla van Wieringen, Daan Weggemans and Marieke Liem argue that in light of this…

Salicylic acid (SA) is a plant hormone, which is involved in the defense responses to pathogens and to abiotic stress, and in the regulation of plant growth and development.

Globally and regionally, biodiversity is declining and there are shifts in species’ occurrences and functional traits.

Curved single crystals provide variable, but well-defined surface structures.

The Directorate-General Police, Sanctions, and Protection has initiated this research project in order to gain insight in the nature and, if possible, the extent of the developments with regards to the pluralization of policing functions in the Netherlands in support of future policies for the benefit…

The progressive loss and degeneration of dopaminergic neurons is a major pathological hallmark of Parkinson's disease (PD). The onset and progression of PD can be triggered by multiple risk factors, for instance, genetic mutation, environmental exposure, and aging.

Promotor: J. van der Greef; Co-promotor: E. van Wijk, M. Wang

On 12 mei 2020, Darryl Robinson defended 'Exploring Justice in Extreme Cases: Criminal Law Theory and International Criminal Law'. The doctoral research was supervised by Prof. C. Stahn.

Promotor: J.M. van Ruitenbeek, Co-Promotor: S.J. van der Molen

Assessment of teaching is currently becoming more and more common practice. As such assessment is generally based on complex, qualitative data from multiple sources (e.g., lesson plans, video-taped lessons, written reflections of the teacher on his or her performance), the overall quality of the assessment…

Als gevolg van de grote technologische vooruitgang in de gezondheidszorg worden in toenemende mate gegevens verzameld tijdens de uitvoering van klinische onderzoeken.

Large numbers of children all over the world face significant health risks, such as infectious and chronic diseases, malnutrition, injuries and the consequences of natural disasters, protracted armed conflicts and poverty.

This thesis investigates the relations between metabolism and anatomy through the use of Magnetic Resonance Imaging (MRI).

What do scholars do when they talk about virtues (impartiality, accuracy) or vices (dogmatism, prejudice)?

PhD defence

Brain activity changes as people age, which can lead to cognitive decline. By measuring and comparing brain data from mice and humans, the researcher will investigate how the brain’s noise levels change with age and affect choice behavior.

Jan Dumolyn, Professor of History at Ghent Universty gives the Inaugural lecture at the University of Namur. 12 March 2025

In September 2016, the educational programme Universe Awareness (UNAWE) implemented a series of educational activities at Basisschool De Verrekijker, a primary school for refugee children in Katwijk, the Netherlands.

The university was a gift from William of Orange to the people of Leiden for their courageous resistance to the Spanish. We’ve all heard the story of the university’s foundation. But its foundation was also a success story for two friends.

How do galaxies form? Thanks to major technological advances, astronomers are gaining ever-deeper insights, says astrophysicist Mariska Kriek in her inaugural lecture. ‘It’s almost unbelievable how many significant discoveries the James Webb Space Telescope has already yielded in such a short time.…

It must be there. We just cannot see it: mysterious dark matter and dark energy in the universe. Henk Hoekstra is one of the many cosmologists who would love to know what exactly these substances consist of. He has received a European research grant of 1.3 euro million to find out.

Els Rose has received an honorary doctorate from the University of Lausanne. Rose is professor of late and medieval Latin at Utrecht University. The committee commended Rose for “ her original research, that has contributed to an understanding of the breadth and depth of the reception of texts and traditions…

Ineke Sluiter received an honorary degree from the University of Bristol on 18 February 2020. In the Wills Memorial Building, she addressed young doctors about the importance of academic expertise and interdisciplinarity.

Alessandra Silvestri, a cosmologist at the Leiden Institute of Physics (LION), has been awarded an NWO Vidi grant for understanding the expanding universe. A growing number of theories explain why the expansion of the universe is accelerating, while more and more relevant observational data is pouring…

How do different communities of residents in The Hague perceive and manage food waste in relation to citizenship (rights and responsibilities)?

Our current research focusses on the exploration of the Universe using the neutrino. This neutral, almost massless and only weakly interacting particle can open a window to the distant Universe and also dense regions from which photons cannot escape.