When do fire making tools appear in prehistory, and how might the use of these tools manifest in the archaeological record?

Most people know what law is. But what it should be or where it comes from is what interests the researchers from the Institute for the Interdisciplinary Study of the Law. Key to their approach are topics that go right to the heart of philosophy of law. What is a state? What are the limitations of…

By carrying out fundamental research and providing excellent education, universities become a breeding ground for innovation and entrepreneurship.

Health workers have always sought ways to fight disease in vulnerable groups in the population. It is now clear that such research also benefits more prosperous countries. African worm infections and innovative thermometers have shown Leiden researchers how to fight diseases of affluence and keep health…

Many metalloenzymes that are key to bioenergetics are membrane enzymes, with canonical examples the complexes I, II, III and IV in the mitochondrial inner membrane. To study these enzymes in a native-like lipid membrane environment, we aim to develop novel bioelectrochemical techniques.

Which factors (human-dimension and carnivore related) shape human tolerance of large carnivore and large carnivore survival in multiple use forests?

In the logic and aesthetics of a republican baroque the existing world is the result of a moment in which for a split second two or more realities are equally real and after which only a singular one becomes actualized.

Are there general principles or values that should govern our actions as moral agents and/or as political subjects?

Master International Relations specialisation Culture and Politics.

At Leiden University, our Research Group is committed to advancing knowledge and understanding in the field of violence and violence prevention through interdisciplinary scholarship and innovative methodologies. Our faculty members are leading experts in their respective fields, bringing diverse perspectives…

Coffeeshop licences may be issued temporarily and reissued after this period has expired. This follows from a ruling by the Administrative Jurisdiction Division of the Council of State in the appeal lodged by the mayor of Roermond municipality against the Court's April 2021 ruling.

Always taking the same route to work, going for that one dish in restaurants and going on the same holiday each summer: this may ring a bell for those who don’t like uncertainty. Researchers are now discovering that this aversion affects how we understand the world.

When foreign matter enters our body, our immune system has to make a choice whether or not to go on the attack. There are times when the system goes wrong, and we end up with an illness or an allergic reaction. Researchers at LUMC are trying to steer the immune system. The dossier on Immunity, Infection…

Salma Balazadeh, Víctor Carrión, and Jos Raaijmakers, biologists at the Institute of Biology Leiden (IBL), have successfully applied for an NWO grant and got awarded 730.000 euros. The board of NWO Domain Applied and Engineering Sciences awarded funding for their project within the Open Technology Programme…

LACDR, the Leiden Institute for Drug Research, developed better tolerated excipients to prevent adverse effects related to the surface of nanosized drugs such as vaccines. LADCR professor of Biopharmacy Matthias Barz and Polypeptide Therapeutic Solutions (PTS) are collaborating to develop processes…

The Reformed Church removed preacher Caspar Coolhaes - Leiden’s first Professor of Theology – from office because of his advocacy of tolerance. PhD candidate Linda Gottschalk sheds new light on this controversial preacher.

Jojanneke van der Toorn, professor by special appointment in Lesbian, Gay, Bisexual and Transgender Workplace Inclusion at Leiden University, states that it is difficult to create an inclusive work environment. This is partly due to the fact that lesbian, gay, bisexual and transgender people have themselves…

How tolerant is the Netherlands on the work floor? Jojanneke van der Toorn, Professor of the Workplace Pride Chair, the first in the world dealing exclusively with LGBT inclusion in the workplace, answers questions on the International Day against Racism and Discrimination.

Leiden University mourns the victims of the terrorist attacks in Brussels. These attacks are an assault on our democratic society. We will continue to defend our European values of freedom and tolerance against all attempts to undermine them.

Dutch mosquitos are more resilient to saltwater than previously thought. Environmental scientist Sam Boerlijst discovered this during his PhD research at the Hortus botanicus. This knowledge is crucial for understanding how mosquito-borne disease transmission might change in the future.

Glen Newey, Professor of Political Philosophy and Ethics at the Institute of Philosophy, suddenly passed away on 30 September 2017. He was a remarkable personality and a unique scholar, who chaired the practical philosophy cluster at Leiden University with great enthusiasm.

His article on ‘the War on Drugs’ in Colombia and the Philippines has been in the top five most downloaded articles of Oxford University Press for some time. Now, Assistant Professor Santino Regilme is to receive a NIAS grant to map out the global war on drugs.

Academics are increasingly facing threats, harassment and hate speech following public appearances. The Dutch universities – united in the Association of Universities in the Netherlands (VSNU) – is now adopting a number of national measures, from a zero-tolerance policty to psychosocial help for vic…

Three researchers from Leiden University have received awards in the Quantum Technology programme within the National Growth Fund, organised by NWO in collaboration with Quantum Delta NL. Read more about these three futuristic projects.

Methods of treatment for chronic illnesses are limited. Doctors and researchers at Leiden University Medical Center (LUMC) and Leiden University are working on new therapies as an alternative for organ transplants. The goal is to cure the illnesses by restoring organs to their original function. Stem…

The integrity and reliability of academic research are of fundamental importance to the University. All parties, both within the University and outside, must be able to have confidence that our research is conducted in a scrupulous, fair, verifiable, impartial and independent manner.

A History of Dutch Corruption and Morality showcases 300 years of change, continuity, and diversity in the history of Dutch political corruption and public morality. It analyses a series of corruption scandals and shows how the following debates were connected to the big changes of that time: from the…

Social science research helps us understand human behaviour and social structures. These are determined by various factors, which makes the research complex and increases the likelihood of drawing the wrong conclusions. The choice of research method and analysis is therefore extremely important. It…

Bones contain information about people’s lives such as where they came from, their age at death and which diseases they suffered from. Researchers can deduce a lot from them about a person’s life and about human evolution. This generates leads that could help solve present-day problems, such as how…

The ability to create objects and structures with our hands has been essential to human development. This ability is something modern society is at risk of losing. Leiden archaeologists gather knowledge about ancient processes of ‘making and creating’ over the centuries, knowledge that helps our current…

If a society is to be secure, sustainable and resilient, conflicting interests must be reconciled. Researchers at Leiden University study the behaviour of individuals, groups and states in relation to this issue, and use their knowledge to promote equality within and between communities.

Could policies aimed at preventing radicalisation undermine the very trust and social cohesion they aim to strengthen?

The Persian Empire (539-330 BCE) was the first world empire in history. At its height, it united a territory stretching from present-day India to Libya - and it would take 2,000 years before significantly larger empires emerged in early modern Eurasia. Its size and power was revered by some, feared…

Promotores: G.R. de Snoo, B. Sinsin, Co-Promotor: H.H. de Iongh

Health is a wonderful gift, both for humans and for society. If we are able to prevent both physical and mental illnesses, we can spare a lot of suffering and fight rising health costs. Social scientists and physicians in Leiden are working closely together to conduct research on the human mental, behavioural…

What is the population size and social structure in time and space? What is the lion diet and food preference in time and space? What is the home range (MCP and Kernel) and movement in time and space? What are human – lion conflict and responses of lions to traditional herding in time and space? What…

It’s Not Easy Being Green – but we’re here to help! Do you want to live more sustainably but have no idea where to start? Are you interested in making the world greener and do you want to get to the bottom of hot topics? Or are you sceptical about climate change and do you want to hear about the…

The better teaching is for pupils and students, the more solid the basis will be that we give them for their future careers. This type of teaching requires strong instructors and insight into the best ways in which pupils can be supported, and research at Leiden University is making a contribution in…

Loopholes in international tax legislation contribute to the misuse of tax rules by multinationals. Leiden University legal experts investigate how the complex national and international tax rules can be made more consistent in order to create a better tax system.

There’s more to obtaining a bachelor’s or master’s degree than just studying. For example, where can you go for advice, or to let off some steam, practise your favourite sport, stay in shape, socialise, or simply find some peace and quiet? Leiden University can help in all these areas, and more.

The Research Group 'Violence and Violence Prevention' studies interpersonal violence. We seek to better understand the dynamics underlying interpersonal conflict.

The Cleveringa chair was installed by Leiden University in memory of Professor Rudolph Pabus Cleveringa and the courage he demonstrated in November 1940 during the German occupation . It also commemorates the liberation of the Netherlands in 1945.

Science, Institute of Biology Leiden (IBL)

With the 2018 Winter Olympics in Pyeongchang being over, it can undoubtedly be said that a lot transpired between the both Koreas: the visit of Kim Jong-un's sister to South Korea, the $2.64 million budget from South Korea for members of the North Korean Olympic delegation, and the first time the North…

“The union’s 60th birthday is not a moment for gifts and cake, but for reinvention around three new strategic idea. (…) The new Europe must protect, improvise and tolerate opposition”. This is what Prof. Luuk van Middelaa, Professor of Foundations and Practice of the European Union and its Institutions,…

What does it take to truly be ‘one of us’ and what role does language play in this process? In short, what is the difference between ‘a language we understand’ and ‘our language’? This is the question Professor Terkourafi will address in her inaugural lecture on Friday 20 April.

...What does seem clear, though, is that there is a great deal of room for improvement in the process of out-of-home placement. The FSW's social and behavioural scientists give their views.

'I belong here.' This is what the young Jewish law student Hetty Koster felt when she attended the memorable protest speech given by Professor Cleveringa on 26 November 1940. She managed to survive the war by going into hiding. She married Dolf Cohen, later Rector Magnificus of Leiden University, and…