This pioneering Research Handbook with contributions from renowned experts, provides a comprehensive scholarly framework for analyzing the theory and history of international law. Given the multiplication of theoretical approaches over the last three decades, and attendant fragmentation of scholarly efforts, this edited collection presents a useful doctrinal platform that will help academics and students to see the theory and history of international law in its entirety, and to understand how interdependent various aspects of the theory and history of international law really are. Being the first comprehensive analysis of theory and history of international law, this unique book will be of great benefit to academics and students of international politics, ethics and philosophy.