This book provides a theoretical framework which clarifies how different types of international norm conflicts can be solved efficiently. By drawing on Robert Alexy’s distinction between rules and principles, it develops a novel approach which helps better identify and conceptualise norm conflicts and their resolution. The book develops a unique method by which to identify norms of international law as rules and principles respectively. Using examples taken from different international legal regimes, such as international environmental law and international human rights law, it argues...