This book contains more than 40 contributions from academics, specialists and practitioners in International and European law as well as transnational constitutional law. The articles focus on recent developments in these fields and in particular on legal aspects of development. The book is dedicated to Konrad Ginther whose own academic research and work have always been devoted to new developments in international law and the shift of legal paradigms at universal and regional levels. International law in transformation and the right to (sustainable) development as a legal principle have been important aspects of his work. The contributions of his colleagues, friends and scholars, published in honour of his 65th birthday, reflect the interplay of theory, dogmatics and the practice of development in international, European and national constitutional law.