This rich collection focuses on the broad research interests of Professor Nico Schrijver, in whose honour it was created. Written by a wide range of international scholars affiliated with Leiden University's Grotius Centre for International Legal Studies, the essays reflect Professor Schrijver's important contribution to academia and practice, particularly in the fields of sovereignty, human rights and sustainable development. The authors aim to reflect on changes in international law and on new developments in the diverse fields they explore. "Furthering frontiers" is the research theme of the Grotius Centre. Its exploration in this thought-provoking volume is a fitting homage to Nico Schrijver's achievements on the occasion of his retirement as Chair of Public International Law of Leiden University.

Withdrawing from international organizations / Niels Blokker -- Sovereignty as responsibility exercising permanent sovereignty over natural resources in the interest of current and future generations / Daniëlla Dam-de Jong -- Non-state actors and human rights obligations perspectives from international investment law and arbitration / Eric De Brabandere and Larissa van den Herik -- Global threats and fragmented responses climate change and the extra-territorial scope of human rights obligations / Helen Duffy -- What is a state in international law? How is this to be determined? / John Dugard -- The role of customary international law as a tool for the progressive development of international criminal law undermining the sovereignty of states for the sake of humanity? / Robert Heinsch -- The responsibility of the Netherlands for its nationals abroad / Erik Koppe -- How about consolidating the frontiers but furthering the effectiveness of human rights? Lessons from Yerevan / Rick Lawson -- Shifting the frontiers of International Human Rights Law / Titia Loenen -- Waters rising possible effects of sea level rise on the legal regime of baselines and delineation of maritime zones / Xuechan Ma -- The International Criminal Court and human security looking ahead complementarity? / Andrea Marrone -- The establishment of flight information regions and Air Defence Identification Zones Air Law is Air Law and Maritime Law is Maritime Law; shall the twain ever meet? / Pablo Mendes de Leon -- Maritime security and sustainable development and the coastal communities of India an empirical analysis / Bimal N. Patel -- To speculate or not? On determining adequate remedies for denial of justice and other judicial wrongs / Vid Prislan -- Human Rights Law and the return of stolen assets / Cecily Rose -- Principles for the sustainable governance of shared natural resources / Nadia Sánchez Castillo-Winckels -- Economic, social and cultural rights and customary International Law / William A. Schabas -- World law's modern master builders / Otto Spijkers -- The world in disarray. Great-power competition and the decline of multilateralism / Alfred van Staden -- How can we justify international criminal justice? / Carsten Stahn -- China's perception of state sovereignty in international dispute settlement / Linlin Sun -- Public administration and ordinary virtues the Venice principles on the ombudsman Institution / Luc Verhey -- The right to marry as a right to equality about same-sex couples, the phrase "men and women", and the travaux préparatoires of the universal declaration / Kees Waaldijk.

International frontiers and boundaries separate land, rivers and lakes subject to different sovereignties. Frontiers are "zones" of varying widths and they were common many centuries ago. By 1900 frontiers had almost disappeared and had been replaced by boundaries that are lines. The divisive nature of frontiers and boundaries has formed the focus of inter-disciplinary studies by economists, geographers, historians, lawyers and political scientists. Scholars from these disciplines have produced a rich literature dealing with frontiers and boundaries. The authors surveyed this extensive literature and the introduction reveals the themes which have attracted most attention. Following the introduction the book falls into three sections. The first section deals systematically with frontiers, boundary evolution and boundary disputes. The second section considers aspects of international law related to boundaries. It includes chapters dealing with international law and territorial boundaries, maps as evidence of international boundaries and river boundaries and international law. The third section consists of seven regional chapters that examine the evolution of boundaries in the Americas, the Middle East, Africa, Asia, Europe, islands off Southeast Asia and Antarctica.

** Winner of the ABILA (American Branch of the International Law Association) Book of the Year Award for a Book on Practical or Technical Subject. ** In this book James Nafziger covers emerging topics of cultural heritage law, a relatively new landmark in the field of both national and international law. His primary focus is on the frontiers identified and developed by the numerous work products of the International Law Association's Committee on Cultural Heritage Law, expanded and updated by some of his own writings. The construction of cultural heritage law is a good example of transnationalism at work, combining national initiatives with diplomacy, UNESCO and other intergovernmental agreements, international custom, and non-governmental initiatives such as the ILA committee's own contributions. These have included published studies, annotated principles and resolutions, draft treaties and a book focused on national practices in the international trade of cultural material. This volume concludes by briefly exploring current and future frontiers of a burgeoning range of topics that are central to many people's daily experiences and interests. This book was awarded the ABILA (American Branch of the International Law Association) Book of the Year Award for a Book on a Practical or Technical Subject, in 2022.

Over the past decades international affairs have been increasingly legalized. International law has dramatically expanded into new fields and taken on new challenges. Despite this development, there has been little in-depth scholarship on what impact these changes have had on the field of international legal theory, how it is taught, and where it is going. This volume investigates the major developments in the field and explores the core assumptions and concepts, analytical tools, and key challenges associated with different approaches. An outstanding team of legal academics provides an accessible overview of competing theoretical movements, and a more in-depth understanding of the strengths, preoccupations, insights, and limits of those schools of thought. The contributions provide an authoritative account of current thinking about the theoretical foundations of contemporary international law and will serve as an indispensable resource for students, scholars, and practitioners.

Roman law as a field of study is rapidly evolving to reflect new perspectives and approaches in research. Scholars who work on the subject are increasingly being asked to conduct research in an interdisciplinary manner whereby Roman law is not merely seen as a set of abstract concepts devoid of any background, but as a body of law which operated in a specific social, economic and cultural context. This context-based, 'law and society' approach to the study of Roman law is an exciting new field which legal historians must address. This interdisciplinary collection focuses on three larger themes which have emerged from these studies: Roman legal thought the interaction between legal theory and legal practice and the relationship between law and economics.

This volume provides an innovative and engaging way of assessing the development of international law scholarship and practice to date and its potential future development by focusing upon the ‘leading works’ of the discipline. International law has established itself as an important area of academic study and legal practice. Given its academic, legal and everyday significance and its prolific role within law school teaching and research, it is important to question and analyse the development of international law, exploring the complex and shifting interplay between law, policy, theory and culture and the role of international and national actors within a diverse and dynamic community of nations. This collection presents contributions from leading scholars of public international law across the globe and the works chosen by the editor represent a diverse range of subjects within the broader discipline. Each chapter analyses the importance and legacy of a specific work, with a view to reflecting upon how that publication has contributed to shaping the broader literature in the field of international law and how it may continue to have an influence on both scholarship and practice in the future. Taken as a whole, the chapters included in this collection provide an original exploration of a variety of important themes about how the discipline has evolved over time. The Prologue and Epilogue critically assess the development of international law in light of the reflections by contributors. The book will be a valuable resource for lawyers, international law practitioners, students, and academics alike.