The aim of 'Intergroup helping' is to provide an overview of psychological research on intergroup helping, such as between countries or organisations, or in case of international crises. Co-editor Esther van Leeuwen has been an assistant professor at Leiden University in Social and Organisational psychology.…

On 25 January 2018 Yannick van den Brink defended his doctoral thesis titled ‘Voorlopige hechtenis in het Nederlands jeugdstrafrecht’ (‘Pre-trial detention in the Dutch juvenile justice system’). The doctoral research is supervised by Professor Ton Liefaard and Professor Mariëlle Bruning.

What are the university's requirements for PhD candidates? How do you organise your PhD track? You read all about it in the regulations, guidelines and golden rules.

Critical Edition, Translation and Commentary

The Public Policy and Innovation department of the Institute of Public Administration focuses on shaping, implementing, and evaluating policy through innovative approaches. Our goal is to tackle complex societal challenges by exploring technological advancements and creative policy tools.

Why are people sometimes unable to change, even if they want to? Why is it so difficult to change political institutions, or to abandon outdated ways of thinking? This book suggests that we can understand the phenomenon of resistance to change in individuals and institutions by returning to Hegel, one…

Leiden Law School offers an extensive range of English-taught law courses at undergraduate level. These are open to both Dutch and international students alike, giving them a truly international flavour.

CWTS is involved in a number of international partnerships and initiatives.

Exploring the language of the lower classes in the nineteenth century

Making systems biology modelling a central pillar of research in biology

The Central Asia Initiative in Leiden was launched by the Leiden research area Asia Modernities and Traditions (AMT) in February 2015.

In his thesis Tjandra analuses the development of labour law in Indonesia. He focusses on the developments after the fall of the Soeharto regime (1998), the so called reformasi period.

This study seeks to analyse how job stress could be the result of performing administrative tasks

When people migrate, they leave an old environment behind and move to a new one. What exactly happens? How do the migrants feel? How does the host society respond to them?

How did the imperial administration of justice function during the reign of the Severans?

On 23 oktober 2018, Elsemieke Daalder defended her doctoral thesis 'De rechtspraakverzamelingen van Julius Paulus'. The doctoral research was supervised by prof. mr. W.J. Zwalve and Prof. mr. E. Koops.

Take a view on the slides of the presentation and read what the event of Sustainable Travel was about.

Leiden University is working on a green, circular campus, with a significant reduction in energy consumption by 2050 as its goal, as elaborated in the Route Map Energy Transition Buildings, published in 2022.

Joris Larik, Assistant Professor at Leiden University, wrote about the topics of the Brexit, the EU-UK Withdrawal Agreement, and Global Treaty (Re-)Negotiations.

Projects within the theme ‘Computational Biology’ aim to employ mathematical or computational dynamical modelling approaches to discover novel concepts that are important for drug development.

The new sports center, which will also be used as an examination center, will be located at the Campus Square.

This is an annual series of public lectures at the location that forms the heart of astronomy in Leiden: the Old Observatory.

Presenting case studies by both senior and emerging scholars, it makes mandatory reading for anyone interested in the challenges of governance, citizenship and development faced by the people of India’s North East.

The archaeology domain produces large amounts of texts, too much to effectively read or manually search through for research. To alleviate this problem, we created a search system (called AGNES), which combines full text search with entity and geographical search.

NTER-SECTION is a peer-reviewed, open-access journal focusing on contributions from junior archaeological researchers at Leiden University. The journal offers an accessible platform for the publication of individual research by undergraduate and graduate students. The Editorial Board consists of PhD…

Bacteria are highly complex and diverse organisms that have adapted to survive in ecological niches ranging from the most extreme to the most heterogeneous environments.

Kazimierz Twardowski (1866-1938) is the founder of the Lvov-Warsaw School with its strong tradition in logic and its scientific approach to philosophy. Twardowski’s unique way of doing philosophy, his method, is of central importance for understanding his impact as a teacher.

In 2025, we will celebrate 450 years of Leiden University—an occasion not just to look back, but to look ahead! The future belongs to our youth. However, young people’s mental and physical health is under significant pressure. That is why Leiden University places the highest priority on supporting young…

This book asks what it means to think globally about world politics. In an attempt to contextualise the recent ‘globalising turn’ in International Relations (IR), it takes stock of more than 30 years of efforts at addressing IR’s Eurocentric limitations, and explores what ‘thinking globally’ means in…

In 2023, the OSCL, together with the University Library and Academia in Motion, ran a survey to better understand the state of Open Science at our university. In this year's follow-up, we are asking you to give your input, so we can jointly develop how Open Science evolves in our university.

Investigating the relations between Tupi Indigenous Knowledge, Museum Collections and the Dutch Colonization of Brazil

Many important and extraordinary discoveries have been made in Leiden. Roam the city and discover the fascinating stories behind them. All you need is your smartphone!

In the wake of controversial disclosures of classified government information by WikiLeaks and Edward Snowden, questions about the democratic status of secret uses of political power are rarely far from the headlines. Despite an increase in initiatives aimed at enhancing government transparency – such…

Promotor: M.A.G.J. Orrit

On the 10th of January, Astrid van Winden successfully defended a doctoral thesis. The Leiden University Centre for Linguistics congratulates Astrid on this achievement!

In this policy paper, Joachim Koops and Christian Patz are discussing Germany’s comprehensive assessment of Protection of Civilians readiness at the national level.

The miniaturization of machines towards the micron and nanoscale requires the development of joint-like elements that enable and constrain motion. We developed a facile method to create colloidal joints, that is, anisotropic colloidal particles functionalized with surface mobile DNA linkers that control…

In Slaving Zones: Cultural Identities, Ideologies, and Institutions in the Evolution of Global Slavery, fourteen authors—including both world-leading and emerging historians of slavery—engage with the ‘Slaving Zones’ theory.

There are a number of different people in the Faculty of Humanities who deal with aspects of diversity and inclusion. This web page has been developed to make it easier to find the contact details for the right person for you.

The judge as a problem-solver in domestic violence cases involving child victims.

There are a number of problems in philosophy that seem to share a similar possible solution: 'Why do promises and contracts bind?', 'Why ought citizens and judges obey the law?' and 'Can we realize the gains to be made from cooperation?'. All three problems (as well as some others) share a possible…

How have British cities changed in the years since the Second World War? And what drove this transformation? This innovative new history traces the development of the post-war British city, from the 1940s era of reconstruction, through the rise and fall of modernist urban renewal, up to the present-day…

Chapter by Fabio Cristiano and Emilio Distretti for the volume The Aesthetics and Politics of the Online Self, edited by Donatella Della Ratta, Geert Lovink, Teresa Numerico, and Peter Sarram for Palgrave Macmillan.

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Welcome to StatiCS: the Statistical Consultation Service. The goal of the service is to provide statistical support to PhD candidates and other researchers.

Like any language, the natural sign languages of deaf communities differ from each other in their grammars and lexicons. A growing number of studies indicates that sign languages make use of the gestures of hearing speakers to build linguistic structure. This implies that variation and similarities…

A well-written submission, a logically built-up argument is easier for a judge to understand.

Deepfakes are videos that have been manipulated to replace one person’s likeness with that of another. They can be difficult to distinguish from authentic videos. In our study, we found that people who score high on conspiracy thinking and people who use social media more are better at distinguishing…