The book gathers a group of scholars interested in both public international law and EU law to cover different facets of the relationship between the European Union and customary international law. Considering the distinct perspectives taken by international law and EU law, while also looking into the space in between the two, individual chapters tackle complex questions such as whether and on what bases the European Union is bound by customary international law as a matter of international law and EU law; how the European Union contributes to the development of international custom; and how different stakeholders – the Court of Justice of the European Union, the EU's political organs and EU citizens – rely upon customary rules. The book thus offers a systematic account of the relevance of customary international law for the external relations and internal functioning of what is no doubt the most remarkable regional international organization of our time.

With a view to recent developments in both the EU and the global legal order, International Law as Law of the European Union explores how, and to what extent, international law still forms part of, and plays a role in, the current legal order of the European Union.

International Law and the European Union addresses the public international law issues that arise from the European Union's international action.

The debate about the relationship between international and community law usually centres on the question of which of these two 'belongs' to the other, and how 'special' community legal order is in relation to international law. In this volume, a distinguished group of Finnish and British academics and practitioners break new ground by, instead of becoming mired in these questions, clearly examining the international law aspects of the activities of the Community and the Union. In doing so, they have elucidated points of connection and possible points of conflict. The result is a thought-provoking collection of essays which examines community law through the conceptual grid of international law, and thus enriches our understanding of the workings of both.

The European Union plays a significant role in international affairs. International Law and the European Union examines the impact this has had on public international law by integrating perspectives from both EU law and international law. Its analysis focuses on fields of public international law where the EU has had an influence, including customary international law, the law of treaties, international organizations, international dispute settlement, and international responsibility. International Law and the European Union shows how the EU has had a subtle but significant impact on the development of international law and how the international legal order has developed and adjusted to accommodate the EU as a distinct legal actor. In doing so, it contributes to our understanding of how international law addresses legal subjects other than States.

This textbook offers for the first time a comprehensive analysis of the classic doctrines and main areas of international law from a European perspective, meeting the needs of the many European law schools teaching public international law in English. Special attention is devoted to the practice of the European Union, the Council of Europe and European States – both civil law and common law countries – with regard to international law. In particular the book analyses the interplay between international law, EU law and national law in the case law of the Court of Justice of the EU, the European Court of Human Rights and national jurisdictions in Europe. It provides the reader with insights into how the international legal practice of the EU and its Member States impacts the development of international law, both in terms of doctrines such as treaty-making and customary law, the exercise of (extraterritorial) jurisdiction, state responsibility and the settlement of disputes, as well as particular sub-fields of international law, such as human rights law and international economic law. In addition the book covers other important areas such as the use of force and collective security, the law of armed conflict, and global and regional international organisations. It provides European perspectives on all these issues and will be of great value to students, scholars and practitioners.

"The European Communities were first established and built using public international law instruments. Since its establishment, there has been debate about whether, and to which extent, the Community (now Union) transformed into something else - from an organization established under public international law into a new legal order that has since escaped these international law origins. Early debates about the EU and international law dealt with this question of whether the Union can still be understood as a 'creature of international law'. Later debates focused on the question of how international law applies and is given effect within the EU legal order. These debates were less concerned with the international law origins of the EU, but with whether the EU legal order was 'open' or friendly towards international law. This was influenced by the case law of the European Court of Justice, in which the Union gave internal effect to obligations arising from international law. Klabbers' study on The European Union in International Law, for example, looks inwards to 'investigate how the European Union treats international law'"--