This monograph -- written by an historian and Norwegian diplomat -- considers the past Westphalian Paradigm and present Popular Sovereign Paradigm of the international order, and discusses possible elements of a new paradigm for a global order suitable to address contemporary problems that transcend national borders.

"The ambitious aim of the work is to create a guiding framework for international criminal procedural law and practices in the future. As explained by the working groups, the overarching objective of the project is to assist the challenge of delivering fair but also effective trials". -- FOREWORD.

This systematic, contextual and practice-oriented account of complementarity explores the background and historical expectations associated with complementarity, its interpretation in prosecutorial policy and judicial practice, its context (ad hoc tribunals, universal jurisdiction, R2P) and its impact in specific situations (Colombia, Congo, Uganda, Central African Republic, Sudan and Kenya). Written by leading experts from inside and outside the Court and scholars from multiple disciplines, the essays combine theoretical inquiry with policy recommendations and the first-hand experience of practitioners. It is geared towards academics, lawyers and policy-makers who deal with the impact and application of international criminal justice and its interplay with peace and security, transitional justice and international relations.