The aim of this thesis was to study phage infection in Streptomyces, focused on cell wall-deficient cells. Bacteriophages (or phages in short) attach to the cell wall of bacteria after which they replicate and lyse the host cell.

In this article, Joris Larik and Richard Ponzio grasp the importance of the Summit of the Future to overhaul and strengthen multilateral cooperation in an age of deepening rifts and increasing competition between the great powers. This article argues that a failure to convene a meaningful and ambitious…

The first book ever on information-theoretically secure multiparty computation

MetaROR is an open peer review platform based on the publish–review-curate model and aims to improve the dissemination and evaluation of metaresearch.

Monthly PhD Labs offer COI PhD researchers an opportunity to present their work and receive specific feedback about their projects in a supportive and collegial environment.

Research in the field of Etruscology at the Faculty of Archaeology of Leiden University (UL; the Netherlands) aims at exploring the history of the religious and ideological mentality of the Etruscans by studying archaeological, epigraphical and ancient written sources.

The Egyptian hieroglyphic script was exceptionally versatile, as becomes clear when studying its multiple uses both within Ancient Egypt and beyond its borders.

Phonology is the study of speech sounds within and across languages. It touches topics such as speech sound variation, speech sound combinations and acquisition.

The primary goal of GAP is to study the impact of globalization and internationalization policies and practices on the gender balance in research and higher education in Norway.

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.

Bringing together scholars from a broad range of theoretical perspectives, The Language of Argumentation offers a unique overview of research at the crossroads of linguistics and theories of argumentation.

An Ancient Egyptian System of Workmen’s Identity Marks

The available tools for academic literature search return a list of ranked documents, which might not be ideal for some tasks. To facilitate these tasks, I am creating a visual representation of the academic search space where the user can browse academic topics.

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.

The Diversity and Inclusion Expertise Office advises the Executive Board and works in close collaboration with the faculties, expertise centres and policy administrations to promote diversity and inclusion

Nobody is better qualified to tell you what it is like to work at Leiden University than the employees themselves. Watch the videos and meet your future colleagues. They will be happy to share their experiences with you.

The profile area Political Legitimacy brings together researchers from multiple research institutes within Leiden University.

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…

The transformation of the myriad of medieval kingdoms, principalities, local lordships, city-‘states’ and peasant ‘republics’ into ‘modern’ states, claiming some measure of sovereignty, remains one of the core themes of European history, because it gets down to the very root of the (idea on the) Europe…

Perfect for use at advanced undergraduate and graduate level, this is the first text to offer students a unified narrative regarding the place of the body in Western thinking. The book investigates the ways in which the fact of human embodiment makes the notion of ambiguity central to all major areas…

This book discusses theories of crisis management and the radical right, to shed light on how responses to crisis influence radical right parties in their presence, discourse, and evolution. The book offers a comparative perspective by examining case studies with various traditions of radical right…

Criminal justice raises intricate moral questions concerning the justification of the penal institution, the mode and extent of criminal sanctions enforcement, the content of criminal sanctions (imprisonment, fines, alternative punishments), the nature of the agent holding penal authority, the normative…

The philosopher and psychologist G.F. Stout was the teacher of Moore and Russell around 1894. This book shows that Stout's ideas have played a role in Moore and Russell's development from their early idealism towards analytic realism, where Stout's ideas often find their origin in early phenomenolog…

Who had a say in making decisions about the natural world, when, how and to what end? How were rights to natural resources established? How did communities handle environmental crises? And how did dealing with the environment have an impact on the power relations in communities?

Porosity between Politics and the Economy addresses the relationships between politics and the economy in deeply original ways. It is a book motivated by a sense of urgency aroused by both the failure of modern capitalism and the environmental crisis.

Promotor: G.A. Persoon, Co-promotor: H.H. de Iongh

Ongoing microwear analysis of the flint artefacts from the Funnelbeaker period suggests that flint had a pivotal role in the representation and structuration of the cosmological order of Funnelbeaker society.

Members of the collective explore what it means to be ‘human’, in the past and present, from a range of different perspectives and inter-disciplinary approaches.

A multi-disciplinary approach to past lifestyles and cultural practices

This section features online articles by or about the team members of the Food Citizens? project.

We investigate water quality and want to understand the effects of human interference on aquatic biodiversity.

For a first time the atlas maps the soil biodiversity of the entire planet, and provide s comprehensive analysis of human-induced threats to soil organisms and soil functioning, facilitating development of new policies to protect soil and soil organisms.

This PhD project investigates the forms, functions, meanings, and socio-cultural values embedded in Palenda, in order to understand how it reflects and shapes the worldview of the Muna people (Mieno Wuna) through metaphor.

With an MSc degree in Governance of Sustainability you are well prepared for a broad array of career prospects in the field of sustainability, such as working with or for governments, at consultancies or continuing your academic research.

The Biology programme offers 4 research-oriented specialisations corresponding with the research themes within the three institutes involved. You can choose a more practical-oriented specialisation if you would like to combine Biology with education, management business, or science communication.

Researchers using remote sensing technologies have characterized pre-Columbian regularly-shaped earthworks in forests in Central America and the Amazon. In tropical forested mountains in South America, two challenges arise when identifying archaeological sites through remote sensing. Firstly, sites…

It came as a shock to many people: one million plant and animal species are threatened to become extinct. But this number isn’t the most relevant aspect, argue Alexander van Oudenhoven, Koos Biesmeijer and three other experts in Dutch newspaper Trouw. ‘It is more important to realise that the fate of…

On Thursday 23 May, a jointly organized Lunch Seminar between the Leiden Research Lunch and the research program Interaction Between Legal Systems takes place. In this special seminar we have the honour of receiving Maria Weimer from the University of Amsterdam, who will present her new book on

A plant-based diet could improve the resilience of our food system. Moving to such a diet in the European Union (EU) and United Kingdom (UK) alone could replace almost all the production losses from Russia and Ukraine. That’s what an international team of researchers conclude in Nature Food. Leiden…

Crises like climate change and loss of biodiversity threaten our planet. That’s why sustainability is an important topic in research and education across Leiden University. On this website you read how scientists from many disciplines work together in researching sustainability.

The Life in Custody (LIC) Study comprises a large-scale research project into prison climate and the quality of prison life in Dutch prisons.

The people behind The Hague Journal of Diplomacy and its online platform.

For a long time, the painful history of colonial slavery received too little attention. People whose ancestors lived in slavery are now asking critical questions about how we should address that past. Leiden University researchers study the history of colonialism and slavery and their long-term impact…

There is a growing demand throughout the world for ways to understand and preserve cultural heritage. Heritage has a crucial role to play because it strengthens societies and promotes understanding among cultures. Leiden expertise in the area of heritage spans the whole world.

History is being taught at Leiden University since the days of Justus Lipsius [1547-1606]. In 1860, following the appointment of Robert Fruin as Leiden professor of Dutch History, modern historical investigation started in the Netherlands.

In 'That's Why Teacher', our educators share their experiences. Asking challenging questions to seek a deeper understanding is how Stella Trompet perceives the growth of her students. She serves as a lecturer in the half-minor and master's programme Health, Ageing, and Society at LUMC/Leiden Univers…