The fight against impunity has become a growing concern of the international community. Updated in 2005, the UN Set of Principles for the Protection and Promotion of Human Rights Through Action to Combat Impunity is the fruit of several years of study, developed under the aegis of the UN Commission on Human Rights and then affirmed by the Human Rights Council. These Principles are today widely accepted as constituting an authoritative reference point for efforts in the fight against impunity for gross human rights abuses and serious violations of international humanitarian law. As a comprehensive attempt to codify universal accountability norms, the UN Set of Principles marks a significant step forward in the debate on the obligation of states to combat impunity in its various forms. Bringing together leading experts in the field, this volume provides comprehensive academic commentary of the 38 principles. The book is a perfect companion to the document, setting out the text of the Principles alongside detailed analysis, as well as a full introduction and a guide to the relevant literature and case law. The commentary advances debates and clarifies complex legal issues, making it an essential resource for legal academics, students, and practitioners working in fields such as human rights, international criminal law, and transitional justice.