This book explores how changes in the patterns of cooperation and conflict among states, regional actors and transnational non-state actors have affected the rise of emerging global powers and the suggested decline of US leadership. Scholars, students and policy practitioners who are interested in the…

How do individuals make decisions? What determines the quality of group decisions? When and why do people cooperate with others? How does intergroup competition evolve?

This master’s programme focuses on understanding the causes and consequences of armed conflict between states and within states. In addition, we explore whether and how local, national and international actors and institutions can forge cooperation, prevent political and armed conflict from emerging,…

This new study by professor Peter Hoppenbrouwers focuses on conflict in village communities of late medieval Drenthe in order to depict a typical peasant society in late medieval Europe.

The Future of Multilateralism addresses current challenges and future perspectives of international and regional organizations. It aims to uncover how stable the foundations of global cooperation really are, particularly in the light of the latest unilateral and protectionist practices of international…

Violence during war often involves upswings and downturns that have, to date, been insufficiently explained. Why does violence at a particular point in time increase in intensity and why do actors in war decrease the level of violence at other points? Duyvesteyn discusses the potential explanatory variables…

Are you interested in international organisations, issues of peace and security, or current changes in global political relations? Would you like to study the causes of terrorism and the resolution of violent conflicts? Develop your scholarship and skills in international affairs in The Hague.

Carsten de Dreu has received the Carol and Ed Diener Award in Social Psychology which is designed to recognise a mid-career scholar whose work has added substantially to the body of knowledge to the social psychology field and brings together personality psychology and social psychology.

People prefer to reward cooperative behaviour than punish egotistical behaviour, even if this egotism has a negative effect on others. This is the conclusion of organisational psychologist Welmer Molenmaker in his research on the willingness to reward or punish cooperative behaviour. PhD defence 19…

On 26 June 2019, Lisa Louwerse defended her thesis 'The EU’s Conceptualisation of the Rule of Law in its External Relations: Case Studies on Development Cooperation and Enlargement'. The doctoral research was supervised by Prof. C.A.P. Hillion.

State fragility and conflict continue to be among the most enduring development challenges of the 21st century. The consequences of fragility and conflict on individuals, States and the international community are profound. At the individual level, an estimated 2 billion people or a quarter of the world's…

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

This research programme seeks to understand the dynamics in the relationship between social media, mobile telephony and the social fabric under duress in Africa's mobile margins. It combines studies on mobility/migration, conflict and communication in an attempt to uncover these new dynamics, which…

The project investigates the implementation of policies and practices related to reconciliation and the strengthening of government capacity in the Odesa and Kharkiv regions of Ukraine.

How does self-reliance lead to a decrease in collaboration for public goods?

What are the determinants of the willingness to administer rewards for cooperation and punishments for non-cooperation, and how do they influence people’s sanctioning behavior?

The Covid-19 'infodemic' and conflict resolution by internet platforms.

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.

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.

Leiden University has long had a special interest in and relationship with China.

How can we solve value conflicts?

This research cluster is a part of the Institute of Political Science’s research programme ‘Institutions, Decisions and Collective Behaviour’. Its members investigate the drivers of political conflict and various types of crises. They study how citizens, political institutions and international organizations…

The debate about state behaviour in cyberspace may be set in the wrong legal key.

Indonesia is, and has long been, an important object of study for academics in Leiden in a wide range of disciplines.

Leiden University has signed a substantial number of Memoranda of Understanding with institutions in Latin America and the Caribbean Region.

Leiden psychologist Carsten de Dreu was presented with the Spinoza Prize by Education Minister Van Engelshoven on 12 September. The award of 2.5 million euros will allow him to continue with his pioneering research on group dynamics.

Tom Buitelaar is an Assistant Professor in the War, Peace & Justice program of the Institute of Security and Global Affairs. This paper suggests a number of important avenues for states, the UN, and the ICC to improve the likelihood that the ICC receives assistance from UN peace operations.

What is the population size/structure and distribution of tiger and leopard inside the Bardia National Park (BNP) compared with the population outside? What is the movement and home range and conflict pattern in time and space of tigers and leopards inside the BNP compared with outside? What constitutes…

Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh

Maritime conflict management is the regulation of conflict in relation to the sea. It comprises conflict enforcement, conflict resolution and conflict avoidance. How did victims of maritime conflicts claim and obtain damages or demand compensation or reparation?

Governance and Global Affairs, Institute of Security and Global Affairs

Governance and Global Affairs, Institute of Security and Global Affairs

Erasmus+ Strategic Partnerships (Key Action 2) are transnational projects designed to develop and share innovative practices and promote cooperation, peer learning, and exchanges of experiences in the fields of education, training, and youth. There are two kinds of Strategic Partnership; those supporting…

Both on a personal and institutional level, the staff of Leiden CADS collaborates with:

Can you imagine a radically different world? In our times dominated by neoliberal capitalism, we seem to lack not only viable alternatives, but also the capacity to envision anything outside of the status quo.

Large carnivore population is globally declining as a result of the fragmentation of habitat, large prey depletion and retaliatory killing by pastoralists.

This research project addresses an unexplored dimension of historical conflict resolution: the dynamics of strategic choices made by traders engaged in foreign trade in the city of Danzig (Gdansk) c. 1450-1580, a Hanseatic city under the Polish Crown.

Study why and how, in countries around the world, people mobilize around ethnic, racial, religious and social identities, and explore the role of political institutions in mitigating conflicts that arise from such mobilization.

The specialisation Global Conflict in the Modern Era of the master’s in International Relations at Leiden University engages you with the scholarly debates about global conflict today and in the recent past.

What can we learn from how maritime conflicts were managed in the past? What significance did Maritime Conflict Management have in shaping the standards of diplomacy and international law in pre-modern Atlantic Europe (1200-1600)?

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

In my research, I focus on cooperation, social dilemmas, tacit coordination, uncertainty, sanctions and trust.

Legal proceedings are often time-consuming, costly and stressful. Accessible out-of-court dispute resolution can sometimes offer a good alternative, but having access to reliable and efficient judicial proceedings remains equally important.

This socio-legal research focuses on the impacts of environmental displacement on land rights and land-related conflict in Mozambique in the aftermath of cyclone Idai, and on the role of the legal framework in addressing these problems.