On the brink of war, what influences decision makers to attack another country? Using innovative theoretical angles, Femke E. Bakker explores whether the basic assumptions of democratic peace theory are indeed correct. She stresses the microfoundations of conflict, questioning the assumptions on…

Principles of Environmental Sciences provides a comprehensive picture of the principles, concepts and methods that are applicable to problems originating from the interaction between the living and non-living environment and mankind. Both the analysis of such problems and the way solutions to environmental…

Because thin systems can deform along the thickness with relative ease, the interplay between surface mechanics and geometry plays a fundamental role in sculpting their three-dimensional shape.

Promotor: Prof.dr. J.A. Bouwstra, Co-promotor: Dr. A. El Ghalbzouri

A British English Pronunciation Course Book

Promotor: M.L. van Hecke, Co-Promotor: B.P. Tighe

The focus of our theoretical research is understanding the behaviour of soft condensed matter, physical matter which is deformed or structurally altered by thermal fluctuations or small stresses.

Key publications of the Biologics Formulation group

Prostate cancer (PCa) is one of the most prevalent cancer in males.

Jaroslaw Kantorowicz, assistant professor at the Institute of Security and Global Affairs, isolated the reaction of the public to the potential breach of constitutional fiscal rules from the reaction of other players, such as the opposition, media and civil society organizations.

This comparative study investigates court politics in four kingdoms that succeeded the south Indian Vijayanagara empire during the sixteenth to eighteenth centuries: Ikkeri, Tanjavur, Madurai, and Ramnad. Building on a unique combination of unexplored Indian texts and Dutch archival records, this research…

Promotor: Prof.dr. A. P. IJzerman, Co-Promotor: Dr. L.H. Heitman

Bacterial biocatalysis constitutes a sustainable alternative for high-value chemicals production by enabling the utilization of renewable feedstocks.

This is a critical edition with introduction and indices of the Questiones libri Porphirii, a commentary on Porphyry’s Isagoge attributed to the fourteenth-century logician Thomas Manlevelt.

This project will lead to a critical edition and annotated translation of the Niśvāsamukha, the opening book of the Niśvāsatattvasaṃhitā.

Promotor: Prof.dr. P.G.L. Klinkhamer, Co-Promotor: T.J. de Jong

The book addresses the question “How and why do people become involved in European homegrown jihadism?

Microbial Sciences'contribution to the Development & Disease research theme is to perform world-class research to understand cellular morphogenesis, growth, development and virulence of microbes.

Muslim scholars work in a long and rich tradition of knowledge-production in their own culture.

Much has been said regarding the global flows of information that are characteristic of modernity; it has been frequently stressed that these conduits are so deeply embedded that local or national environments may be imagined as having a global span. Thus, while we are now well aware that the imagination…

Understanding individual differences in self-regulation in boys with ODD/CD on the level of brain, cognition and behavior

This article written by Marieke Liem & Alexander Kamprad investigates the relationship between terrorism and interpersonal violence. They conducted cross-national analyses on the effects of terrorism mortality rates on homicide rates. Results showed that terrorism appears to be robustly and positively…

Solar energy harnessed by plants and algae has great potential to be converted into biofuels for future generations.

Promotor: Prof.dr. M.L. van Hecke

Effects of maternal smoking, premature birth, intra-uterine growth retardation and asphyxia on child development.

The return payment of 900 euros for Syrian asylum seekers is a striking part of the Dutch policy to promote voluntary return. Mark Klaassen, university lecturer in immigration law, told RTL News he considers the scheme premature and points to the uncertainty about how safe Syria currently is.

Vincent Delhomme delivered a keynote speech on the topic of food affordability at the European Parliament in Strasbourg, on 22 January 2025. The event focused on achieving a balanced food system that is sustainable, healthy, and affordable.

In a recent interview with Maya Plentz for The Unbrief, Dr. Gianclaudio Malgieri, Associate Professor of Law & Technology at eLaw, Leiden University, explored the intersection of AI-powered search technologies and privacy rights.

The volume includes contributions on various aspects of the legal relationship between Switzerland and the European Union.

Since 1974, World Environment Day has been celebrated every year on 5 June, engaging governments, businesses and citizens in an effort to address pressing environmental issues.

There’s a lot that goes wrong in the treatment of patients with PTSD caused by childhood trauma. Endowed professor Maartje Schoorl wants to resolve this by bringing scientific research closer to the practice. Inaugural lecture on Friday 29 April.

Leiden University is involved in five new NWO Gravitation projects. Two relate to mental disorder and the remaining three to a healthy lifestyle, the combination of human and artificial intelligence, and the special relationship between plants and microbes.

Although coeliac disease, an autoimmune disorder that makes you gluten intolerant, occurs in 1% of the population, its diagnosis is often delayed or completely overlooked. To prevent health problems, this must change. That is what Professor of Paediatrics Luisa Mearin said at her inaugural lecture on…

Who will be affected by certain chronic diseases, and who will not? For 30 percent that depends on heredity factors, whereas no less than seventy percent is explained by external factors. A Dutch research consortium receives 18 million euros from the prestigious Zwaartekrachtsubsidies to study these…

Scientist looked for the genetic footprint of fire use in our genes, but found that our prehistoric cousins - the Neanderthals - and even the great apes seem better at dealing with the toxins in smoke than modern humans.

Extremely painful chronic cluster headaches – sometimes referred to as ‘suicide headaches’ – can be prevented by stimulating the occipital nerve in the back of the head, according to research conducted by Professor Emeritus of Neurology Michel Ferrari from Leiden University Medical Center (LUMC). The…

Rector Magnificus Carel Stolker will retire on 8 February. If there’s one theme running through his career, it’s the links between the University and society. In this series of pre-retirement discussions, Stolker will talk one last time to people from within and without the University. In this edition…

In Leiden University's Vision on Sustainability 2030, biodiversity (biological diversity) is an important focus in its teaching and research and on its campuses.

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Meet the people of the Resilience Center

The CMCB brings together microbial cell biology expertise in Leiden. It aims at optimal resonance between the groups and maximal exploitation of the available infrastructure and to develop innovative cross-boundary technology platforms.

National parochialism is the tendency to cooperate more with ingroup than outgroup members. Angelo Romano, Matthias Sutter, James Liu, Toshio Yamagishi & Daniel Balliet studied national parochialism across different nations and conclude in their publication in Nature Communications that it is a ubiquitous…

Research projects

The master's specialisation Occupational Health Psychology consists of three main parts: the mandatory and elective courses, a thesis and an internship.

The master's specialisation Molecular, Cellular and Organismal Biology at Leiden University examines the molecular mechanisms underlying health and disease and how cells and organisms adapt to environmental factors.

The bacterial cell wall is a nearly universal structure that offers protection and gives the cell its shape. However, environmental stressors, such as cell wall-targeting antibiotics and hyperosmotic conditions, can induce bacteria to shift to a wall-deficient state. It is unknown whether the lack of…

Promotor: Carel J. ten Cate, Co-Promotor: Hans W. Slabbekoorn

This project aims at investigating the syntactic role of focus in ellipsis across languages.

In this research I assess the impact of the recently discovered gas reserves south off Cyprus on the escalation of the Cyprus conflict.