This book, compiled in honour of the work and life of Professor Jonathan Fitchen, brings together preeminent scholars from across the private international law world to address a wide spectrum of subject matter in the discipline. It offers substantial new insights into our understanding of private international law - from theory to practice. The contributions in the book analyse a variety of conceptual and substantive problems in private international law and consider current developments in the discipline, from conceptual analyses of the evolving nature and scope of private international law to substantive problems across a range of longstanding issues on which there is insufficient scholarly analysis. These include contemporary problems of great political importance, such as environmental protection, gender-based discrimination, asymmetries of private power, and the proper delineation of public and private intervention. The authors also address emerging problems in commercial law, such as cryptocurrencies, longstanding definitional concerns in family law, and broader emerging systemic concerns, such as the treatment of authentic instruments and the place of human rights protection in global supply chains. The book is a valuable resource for the judiciary, legal practitioners, policy makers, and scholars and students of private international law.