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.

Learn about PhD research at Leiden University’s Institute for Philosophy: information for current and prospective candidates, supervision, and academic development within the Faculty of Humanities.

This project studies the theory and practice of moral education in the (Neo)Platonic tradition.

Do humans have free will? Does the world look different than it really is? Can moral judgements be right or wrong? In the Dutch-taught Bachelor's programme Philosophy at Leiden University you will ask questions that cross different disciplines and you will study the theories of classical thinkers,…

In this thesis the most dominant academic perspectives pertaining to the relationship between myth and philosophy are questioned and repositioned and Plato’s use of myth is analyzed to demonstrate this reevaluation.

An overview of the educational profile of the Leiden Institute for Philosophy, including its global teaching focus, curriculum themes, and supervision model.

This dissertation explores Aristotle’s use of teleology as a principle of explanation, especially as it is used in the natural treatises.

The philosophers at the Institute for Philosophy develop new perspectives and insights not only on topical themes such as immigration and climate change, but also on more fundamental philosophical questions.

The one-year master's programme in Philosophy at Leiden University offers advanced training in an array of philosophical approaches in a pluralistic and collegial environment. We offer specializations in the major branches of both analytic and continental philosophy, as well as in global and comparative…

Explore philosophical research and education at the Leiden Institute for Philosophy. Our scholars study knowledge, ethics and existence, connecting classical and contemporary thought.

The master's programme in Modern European Philosophy at Leiden University focuses on continental philosophy ranging from German Idealism and Phenomenology via Deconstruction and Poststructuralism through 21st century developments in the field. It explores different approaches to thinking in a critical…

The master's programme in Theoretical Philosophy at Leiden University offers students the opportunity to investigate fundamental questions concerning the nature of reality using the tools of analytic philosophy.

Neil Young and Philosophy, edited by Douglas L. Berger, explores the meanings, importance, and philosophical dimensions of the music, career, and life of this prolific singer/songwriter over the past five decades.

The two-year master’s programme in Philosophy at Leiden University investigates the philosophical foundations of particular disciplines. It provides you with the tools to think systematically and creatively about the foundations of your chosen discipline, using the conceptual and argumentative resources…

The Leiden Centre for Theoretical Philosophy (LCTP) is a platform for analytic philosophy in a broad sense at Leiden University. Its members do research in philosophy of science, philosophy of logic and metaphysics, with a keen interest in the history of topics such as mind, knowledge, truth, and ti…

Many stimulating philosophical analyses have been written on contemporary technology; this book examines on the contrary how changes in contemporary technological environment have been reflected onto philosophy itself. The book shows how technological changes have marked a number of key concepts of…

Leiden University Centre for Intercultural Philosophy (LUCIP) is housed in the Institute for Philosophy at Leiden University.

Are you thinking about studying Philosophy (120 EC)? Learn more and watch the introduction video.

Are you thinking about studying Philosophy (60 EC)? Learn more and watch the introduction video.

The Centre for Political Philosophy (CPP) at Leiden University is an interdisciplinary platform for political thought. It aims to bring together all those with an active interest in the field from different institutes, branches and fields of study at Leiden University.

In what way is constructivist logic able to account for both the role of the judging agent in inference and the universal claims of logical validity?

Philosophy of law is concerned with the the foundations of law.

This two-year master’s programme in Philosophy of the Arts combines in-depth philosophical training in continental philosophy and aesthetics with the academic study of one or more arts, such as visual, musical, literary, and performing arts. Of the 120 EC of the programme, 40 EC will be taken in a discipline…

The master's programme in Philosophy: Moral and Political Philosophy at Leiden University offers an excellent opportunity to explore fundamental issues in moral and political philosophy.

This Global and Comparative Philosophy master’s programme is unique in Europe. It offers comparative perspectives from around the world that will enable you to be part of the next generation of thinkers: someone studying and shaping philosophy for a globalised 21st century.

This project aims to situate the current policy concept of ‘valorization of scientific knowledge’ in historical and epistemological perspectives. Conceptual understanding of the utility of scientific practices is developed in dialogue with historical analyses of the politics of knowledge in European…

Learn about the Institute’s mission, structure and academic community within Leiden University’s Faculty of Humanities.

In this dissertation, Boethius’ mathematics and logic and their roles in philosophy are reassessed, and on the basis of these, the connections between mathematics and logic in Boethius and their applications to theological or philosophical topics are explored.

The Leiden Centre for Continental Philosophy (LCCP) is a research community based at the Institute for Philosophy at Leiden University. LCCP is envisaged as an open space for stimulating discussion, critical debate and inventive co-operation in the local and international philosophical community. We…

This dissertation is a study of the view of the Neoplatonist Proclus (Athens, 411-485) on to what extent and how the changing and unreliable world of sense perception can itself be an object of scientific knowledge.

Get in touch with the Institute for Philosophy at Leiden University. Find address, staff contacts, and general inquiries for academic or administrative matters.

Cody Bahir defended his thesis on 1 June 2017.

This centre brings together the research of the members of the Institute of Philosophy and affiliated academics whose work focuses on the history of philosophy broadly conceived. Research interests range from ancient to near-contemporary philosophy in various regions of the world, and cover all subdisciplines…

Explore the research of the Institute for Philosophy, organised into five centres that connect historical and systematic approaches to ethics, logic, and the history of ideas.

Assesses the importance of Merleau-Ponty to current and ongoing concerns in contemporary philosophy.

This Philosophy: Global and Comparative Perspectives bachelor's programme is unique. It offers comparative perspectives from around the world that will enable you to be part of the next generation of thinkers, someone studying and shaping philosophy for a globalised 21st century.

While Nietzsche's works and ideas are relevant across the many branches of philosophy, the themes of contest and conflict have been mostly overlooked. Conflict and Contest in Nietzsche's Philosophy redresses this situation, arguing for the importance of these issues throughout Nietzsche's work.

If you want to maintain a valid penal system, you have to continue to ask the big questions on punishment. Why do we punish people? What is permissible for the government and what is not? Philosopher of Law Jeroen ten Voorde examines these kinds of questions and keeps his academic colleagues and the…

This master’s programme introduces the student to philosophical issues concerning the foundations of law, politics, and policy. This master’s programme is meant for students who wish to combine a master’s in Law, Political Science, Public Administration, or an adjacent discipline with master’s coursework…

Study information, Online Experience

The Institute for Philosophy at Leiden University is host to the NWO programme,

Festschrift for Prof. Dr Raymond H.A. Corbey in celebration of his 70th birthday

How can party bans be justified? Which parties were banned in post-war Europe – and why? Do militant democracy instruments work? Is an international militant democracy concept in the making?

Nietzsche’s concept of the agon or Wettkampf, a measured and productive form of conflict inspired by ancient Greek culture, has attracted a good deal of interest in Nietzsche studies and beyond. This book, by a leading expert on the topic, brings together research conducted over 20 years with a focus…

While self-driving cars and autonomous weapon systems have received a great deal of attention in media and research, the general requirements of ethical life in today’s digitalizing reality have not been made sufficiently visible and evaluable.

Nietzsche says

How to interpret the concept of truth is a much debated topic in the history of philosophy. The issues related to truth involve language, reality and their correspondence relations.

This dissertation offers a reconstruction of the propositional contents of the writings of Karl Popper, Leo Strauss, and Hannah Arendt while bringing these into discussion with their performative meanings, such as polemical forms of reasoning, analogical and metaphorical uses of language, and hidden…