Olufemi Amao argues that there is a gradual movement from intergovernmentalism to supranationalism in the African Union legal order, and explores how this trajectory gradually and incrementally de-emphasises the discourse on nation state sovereignty; a concept that has caused many problems in the African context. Drawing upon EU law as a comparison, the book also examines how the development of supranationalism affects crucial issues such as human rights, democratic reforms, territorial matters, tribal and religious disputes, and economic relations. As a comprehensive examination of the development of law within a union, this book will be of great interest and use to students, scholars and practitioners in international law, international relations, and African studies.