Based on the proceedings of two international colloquia held at the European University Institute, Florence.

Change and Stability in International Law-Making.

This book provides a comprehensive and detailed analysis of the nature, content and scope of the rules regulating the use of force in international law as they are contained in the United Nations Charter, customary international law and international jurisprudence. It examines these rules as they apply to developing and challenging circumstances such as the emergence of non-State actors, security risks, new technologies and moral considerations.

Offering a new interdisciplinary approach to global justice and integrating the insights of international relations and contemporary ethics, this book asks whether the core norms of international law are just by appraising them according to a standard of global justice grounded in the advancement of peace and protection of human rights.

If international law is derived from the consent of States, who should be in a better position to say what has been consented to than the disputing States themselves? It seems that if the doctrine of consent is taken seriously, there would be no room for an 'objective' legal answer to the question 'What is law?'. Furthermore, States do not necessarily employ the same criteria for determining the applicable law when engaged in dispute. And the doctrine of sovereignty is of very limited utility, since not all of substantive international law can be explained in terms of the atomic concept of sovereignty. This leaves consent as the mediating concept between the substantive doctrine of international law on the one hand and the actual practice of States (and others whose practice and participation in the global legal order help shape the body of international laws) on the other. Nevertheless, this is not to say that there is nothing 'higher' than the actual legal claims forwarded by international actors. International law is no mere superstition, since none argue that there is no (one) legal solution. In that sense, the unity of the international legal order is preserved. The problem is that the solutions actually forwarded in dispute are too numerous and international law too abstract to serve as arbiters between the competing claims. Thus, at the level of substantive doctrine there is a fragmentation of that earlier-mentioned picture of unity. But even here, only consent can mediate between unity and fragmentation, stability and change, order and justice, legislation and revolution. The strength of international law lies in its adaptability to political, strategic and diplomatic necessities. To suggest otherwise is to depart from a picture of international law that presumes the empirical verifiability of international laws. This book has as its principal concern certain orthodoxies of 'source thinking' in international law, and is aimed at working out the implications of these. It aims to show how certain theoretical conceptions have shaped the law in action, for good or ill. It will appeal to political theorists, diplomats, global decision-makers, and international lawyers who are interested in the question 'What can we do with the international law that we have?', as distinct from the question 'What should we do with international law?'.

International law is much debated and discussed, but poorly understood. Does international law matter, or do states regularly violate it with impunity? If international law is of no importance, then why do states devote so much energy to negotiating treaties and providing legal defenses for their actions? In turn, if international law does matter, why does it reflect the interests of powerful states, why does it change so often, and why are violations of international law usually not punished? In this book, Jack Goldsmith and Eric Posner argue that international law matters but that it is less powerful and less significant than public officials, legal experts, and the media believe. International law, they contend, is simply a product of states pursuing their interests on the international stage. It does not pull states towards compliance contrary to their interests, and the possibilities for what it can achieve are limited. It follows that many global problems are simply unsolvable. The book has important implications for debates about the role of international law in the foreign policy of the United States and other nations. The authors see international law as an instrument for advancing national policy, but one that is precarious and delicate, constantly changing in unpredictable ways based on non-legal changes in international politics. They believe that efforts to replace international politics with international law rest on unjustified optimism about international law's past accomplishments and present capacities.

This book contains the final version of the 2018 Report of the International Law Association (ILA) Committee on International Law and Sea Level Rise, as well as the related ILA Resolutions 5/2018 and 6/2018, both as adopted by the ILA at its 78th Biennial Conference, held in Sydney, Australia, 19–24 August 2018. In Part I of the Report, key information about the establishment of the Committee, its mandate and its work so far is presented. Part II of the Report addresses key law of the sea issues through a study of possible impacts of sea level rise and their implications under international law regarding maritime limits lawfully determined by the coastal States, and the agreed or adjudicated maritime boundaries. Part III of the Report addresses international law provisions, principles and frameworks for the protection of persons displaced in the context of sea level rise.

It has never been more important to understand how international law enables and constrains international politics. By drawing together the legal theory of Lon Fuller and the insights of constructivist international relations scholars, this book articulates a pragmatic view of how international obligation is created and maintained. First, legal norms can only arise in the context of social norms based on shared understandings. Second, internal features of law, or 'criteria of legality', are crucial to law's ability to promote adherence, to inspire 'fidelity'. Third, legal norms are built, maintained or destroyed through a continuing practice of legality. Through case studies of the climate change regime, the anti-torture norm, and the prohibition on the use of force, it is shown that these three elements produce a distinctive legal legitimacy and a sense of commitment among those to whom law is addressed.

Policy-makers, national administrations, and regulators engage in making laws without the formalities associated with treaties or customary law. This book analyses this informal international lawmaking and its impact on contemporary trends in international interaction, looking at the questions of accountability and effectiveness it raises.