Analysing the relationship between EU unity and effectiveness in multilateral negotiations on food standards, climate change and health, this book develops a new model that simplifies earlier work on 'actorness' as well as combining insights from institutionalist, intergovernmentalist and constructivist theories.

This book explores how the European Union has been responding to the challenge of diversity. In doing so, it considers the EU as a complex polity that has found novel ways for accommodating diversity. Much of the literature on the EU seeks to identify it as a unique case of cooperation between states that moves past classic international cooperation. This volume argues that in order to understand the EU’s effort in managing the diversity among its members and citizens it is more effective to look at the EU as a state. While acknowledging that the EU lacks key aspects of statehood, the authors show that looking at the EU efforts to balance diversity and unity through the lens of state policy is a fruitful way to understand the Union. Instead of conceptualising the EU as being incomparable and unique which is neither an international organisation nor a state, the book argues that EU can be understood as a polity that shares many approaches and strategies with complex and diverse states. As such, its effort to build political structures to accommodate diversity offers lessons to other such polities. The experience of the EU contributes to the understanding of how states and other polities can respond to challenges of diversity, including both the diversity of constituent units or of sub-national groups and identities.

This article examines the EU's participation in multilateral institutions on the example of the UN Arms Trade Treaty. The central question of the study is to what extent and under what conditions the EU can be seen as an effective actor in multilateral security negotiations. It is argued that overall the EU was an effective player during the multilateral negotiations on the ATT, but the degree of its effectiveness varies along different dimensions. The EU was rather successful in the achievement of its goals and in maintaining external cohesion, but it scored relatively low in its efforts to commit the key stakeholders to sign up to the ATT. The EU's internal export control policy, together with the high level of institutional co-ordination and Member States' interest convergence, facilitated the EU's effectiveness in the ATT negotiations, whereas the international context proved to be the major constraining factor.

This volume looks at the changing goals and instruments of European Union diplomacy and examines the reforms of the Lisbon Treaty and their effects on the unity and coherence of EU external action. The authors analyse institutional questions, particularly about the European External Action Service (EEAS) and the role of other EU actors in European foreign policy, and explore recent examples of EU multilateral, bilateral and unilateral diplomacy as well as the external perspective of third actors. The study concludes by investigating the current and future training of the Union's diplomats, which aims to prepare them for an effective EEAS. Will the implementation of the Lisbon Treaty reforms make the EU fit for the future? Can a common European foreign policy ensure that European interests are taken into consideration and that European values shape international relations? Will the European Union be an actor or an object on the international stage in the coming decades?

This volume focuses on multilateralism in the 21st century and examines how, and how effectively, the EU delivers on its commitment to effective multilateralism. Presenting results generated by MERCURY, an EU research programme into multilateralism, this book addresses a central research question: does the EU deliver on its commitment to effective multilateralism? Globalisation has created powerful new incentives for states to cooperate and has generated renewed interest in multilateralism. While a large body of work exists on multilateralism as a concept, it continues to be ill-defined and poorly understood. This book sheds new light on 21st century multilateralism by exploring conceptual approaches as well as generating innovative, empirical knowledge on its practice. Research on EU external relations has increasingly focused on the concept of ‘effective multilateralism’. Yet, the application of this concept as a guiding principle of EU foreign policy in non-security policy areas has rarely been examined. This book explores whether the EU is pursuing effective multilateralism in specific policy areas, including trade, climate change and conflict resolution, and distinct geographical and institutional settings, both internal to the EU and in specified regions, international organisations (IOs) and bilateral partnerships. This book offers evidence-based, actionable policy lessons from Europe’s experience in promoting multilateralism. The European Union and Multilateralism in the 21st Century will be of interest to students and scholars of international relations, international organizations, and European Union politics and foreign policy.

Under what conditions does the internal cohesiveness of the European Union determine its external effectiveness on the world stage? This book asks this question, investigating the frequent political assumption that the more cohesive the EU presents itself to the world, the more effective it is in achieving its goals. Contributions to this book explore this theory from a range of perspectives, from trade to foreign policy, and highlight complex patterns between internal cohesiveness and external effectiveness. These are simplified into three possible configurations: internal cohesiveness has a positive impact on external effectiveness; internal cohesiveness has no impact on external effectiveness; and internal cohesiveness has a negative impact on external effectiveness. The international context in which the EU operates, which includes the bargaining configuration and the policy arena, functions as an intervening variable that helps us to explain variation in these causal links. The book also launches a research agenda aimed at explaining these patterns more systematically and determining the marginal impact of cohesiveness on effectiveness. This book was originally published as a special issue of the Journal of European Public Policy.

This is the first book to examine in-depth the EU's relationship with the UN and to analyze critically the EU's contribution to 'effective multilateralism'. The contributors show that the EU most often fails to make the UN as effective as it should be in addressing global challenges.