“United Nations peacekeeping is a proven investment in global peace, security, and prosperity. Together, let us pledge to do all we can to enable that mission to succeed”. – Secretary-General António Guterres

In this article, Vanessa Newby, assistant professor at the Institute of Security and Global Affairs, discusses credibility in peace operations. This article argues that credibility in peace operations must be built for both deterrence and cooperation purposes.

Niels van Willigen (Institute of Political Science, Leiden University) puts Dutch participation in UN peacekeeping into an historical context. He analyses the reasons for the Dutch withdrawal from the 1990s onwards, and explores the obstacles and opportunities for a structural return. Van Willigen argues…

In this book, Vanessa Newby provides the first detailed examination of credibility’s essential place in peacekeeping.

Tom Buitelaar is an Assistant Professor in the War, Peace & Justice programme of the Institute of Security and Global Affairs. This paper discusses four important challenges to the involvement of UN peace operations in international criminal justice: its effects on host state relations, peace and justice…

As an interdisciplinary institute in the field of Security Studies, the Institute of Security and Global Affairs (ISGA) covers various topics in its research, one of which is the United Nations and the impact of this global organization in the world.

Gender sidestreaming? Analysing gender mainstreaming in national militaries and international peacekeeping

Bert Koenders, professor of Peace, Law and Security at the Institute of Security and Global Affairs, has been appointed chairman of the Advisory Council on International Affairs (AIV), or foreign policy.

Madeleine O. Hosli, Professor of International Relations, wrote this book in which she analyses the complex relations between the European Union (EU) as a regional organization and the United Nations (UN) as an international, global governance institution.

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.

Can international organisations be held responsible for violations of international law by peacekeepers in a peacekeeping operation?

The main aim of this project is to reveal and unravel the invisible histories of the UN, transcending the dominant Western perspective to recover the historical agency of Global South actors. The research will investigate how the UN has both facilitated and limited their role in shaping global order…

This article devises a framework to assess the degree to which human rights bodies provide duplicating or contradicting recommendations to States. Focusing on the case of torture, it creates an original database of recommendations delivered to 14 countries in the years 2012–2016. Results show that duplications…

Madeleine Hosli, Professor of International Relations at Leiden University, together with two other authors, wrote a chapter in Group Politics in UN Multilateralism. This chapter assesses the composition and functioning of the African Union (AU) within the United Nations.

The Summer School ‘The European Union, the United Nations and Global Governance’ will focus on a range of topics relevant to interactions between the European Union (EU) and the United Nations (UN) and the EU’s role within current patterns of global governance.

Course, Summer School

Madeleine O. Hosli & Jaroslaw Kantorowicz analyze EU states' foreign policy divergence at the UN General Debate, assessing if Lisbon Treaty reforms increased EU cohesion or if states maintain distinct positions.

This commentary on the United Nations Convention Against Corruption discusses each provision of the treaty, traces the provisions’ drafting history, and explores their implementation in domestic legal systems.

The peacekeeping operation in Cambodia is known as an important and rare success. Yet the mission was forced to violate the core principle of peacekeeping, impartiality, in order to be successful.

On 22 November, Tom Buitelaar, Assistant Professor at the Institute of Security and Global Affairs, presents his new book ‘Assisting International Justice’. Five questions to Buitelaar about the book and the book presentation.

From 1 August 2018, Alanna O'Malley was appointed as Chair of United Nations Studies in Peace and Justice, focusing on the ‘lesser-known actors’ of the UN: women, the youth, the agents of informal diplomatic networks within the UN and actors from the Global South. This Special Chair has been created…

This is an Erasmus+ International Credit Mobility project of Leiden University’s Faculty of Medicine with The Wistar Institute in the United States.

From 1967 to 1982, the United Nations undertook several peacekeeping operations in the Middle East. In his thesis from the Institute for History, Diego Salama examines how these operations were connected and their impact on the region.

The unit residue group, to which the present thesis is devoted, is defined using the norm-residue symbol, which Hilbert introduced into algebraic number theory in 1897.

Tom Buitelaar assesses how 'agency' is addressed in peacekeeping studies and identifies gaps.

Buitelaar argues that IOs micro-level discourse adapts imperfectly to macro-level changes, balancing adaptation to pressures with commitment to values.

The Microscopy Unit houses, maintains and coordinates most of the microscopy equipment of the IBL. The available equipment ranges from conventional light and fluorescence microscopes, to confocal laser scanning and electron microscopes. In addition, infrastructure is available for histology, including…

Twenty years after the passing of Resolution 1325, the participation of women as military personnel in peacekeeping operations remains limited. Women currently comprise just under five per cent of military personnel in UN peacekeeping missions, and the UN consistently calls for more.

On 20 October 2021 Michael Ramsden defended the thesis 'The Role of the United Nations General Assembly in Advancing Accountability for Atrocity Crimes: Legal Powers and Effects'. The doctoral research was supervised by Prof. N.M. Blokker.

This is an Erasmus+ International Credit Mobility project of Leiden University Medical Center with Boston Children’s Hospital in the USA.

This is an Erasmus+ International Credit Mobility project of Leiden University’s Faculty of Science with University of California.

Historian Alanna O’Malley has been appointed to a brand-new Professorial Chair in United Nations Studies in Peace and Justice in The Hague. This extra attention for the UN comes at a significant moment in world history, she says.

On 3 December 2019, Meda Couzens defended her thesis 'The application of the United Nations Convention on the Rights of the Child by national courts'. The doctoral research was supervised by Prof. T. Liefaard and Prof. J.J. Sloth-Nielsen.

The book 'The United Nations Convention on the Rights of the Child' is the result of the international academic conference – ’25 Years CRC’ – which was held in November 2014 in Leiden on the occasion of the 25th birthday of the UN Convention on the Rights of the Child.

On 20 November, Special Professor of United Nations Studies in Peace and Justice, Alanna O'Malley, presented her research agenda for the next 3 years. An ambitious agenda full of projects to gain more insight into the origin and functioning of the UN.

On 18 September 2019, Huw Llewellyn defended his thesis 'An Institutional Perspective on the United Nations Criminal Tribunals: Governance, Independence and Impartiality'. The doctoral research was supervised by Prof. N.M. Blokker and Prof. L.J. van den Herik.

The United Nations celebrates its 75th anniversary this year. With the corona crisis and rising nationalism, there’s not much cause for celebration. Which challenges will the global organisation have to overcome to be assured another 75 years of existence?

This article studies the securitization of immigration in the United States of America (U.S.), through the analysis of the National Security Strategies (NSS) published between 2002 and 2017, using a two-layered analytical framework that combines securitization theory and agenda setting theory.

Valentina Carraro gave a presentation titled "Strengthening the Human Rights Council and the UN Treaty Body System" at the 'Reinvigorating the United Nations' Conference organized by the Diplomatic Academy in Vienna on January 27th and 28th. During the conference Valentina presented her research on…

Leiden students organised a Model United Nations (MUN) from 3 to 6 May in The Hague. An MUN simulates the working of the United Nations and is intended to allow students to learn about the practice of international relations. View the photo series.

On Thursday 6 May 2021, alumni of the Bachelor Security Studies (BaSS) and the Master Crisis and Security Management (CSM) were gathered in an online event arranged by the Institute of Security and Global Affairs and the study association L.S.A. Custodia.

In this article, Tom Buitelaar proposes a systematic framework for analyzing the impact of individual characteristics of peacekeeping leaders on the behaviour of field-level personnel in UN peacekeeping operations.

On 8 March 2021, International Women’s Day, Vanessa Newby was a panelist at the online discussion ‘Breaking Barriers – Women in Peacekeeping’, organized by A4P WPS Champions Ireland, Germany, South Africa and Bangladesh together with UNSCR 1325 architect, Namibia.

In this article, Kuipers and Timmermans analyze the first lady's relationship with policy problems in the period 1945-2013.

Adopting a largely chronological approach, Gerrits links the historiography of post-war Europe and the major theoretical approaches to nationalism with analysis of key historical developments and events.