The law on the use of force in relation to the maintenance of international peace remains one of the most important areas of international law and international relations to date. Rather than simply provide another factual account of the law in this area, this detailed and analytical book seeks to explore its normative aspects.

Rooted in public international law, the book provides insight into the historical evolution and sociological environment of this particular branch of law. The competences and practice of the UN and of regional organizations in maintaining peace are examined before the focus is shifted to the inter-State level, the main non-use of force rule and its claimed or recognized exceptions. Robert Kolb analyses each of these rules separately, before concluding with insightful reflections on the current state-of-play and considerations for future developments.

Inquiring, yet practical, this book will appeal to students and scholars studying both international law and international relations, particularly with regard to peace and conflict. It will also be of interest to government officials working in the field.