Founded in 1967, the Association of Southeast Asian Nations (ASEAN) has emerged as one of the most successful regional organizations in the world. This book discusses the future of ASEAN against a backdrop of a growing US–China rivalry and the security implications of COVID-19. Chapters in this book move through a history of ASEAN and its multilateral institutions, including the ASEAN Regional Forum (ARF) and the East Asia Summit (EAS), featuring rare photographic material to contextualize both recent developments in regional security and projections for ASEAN’s prospects. Key concepts and terms are unpacked throughout, with the chapters focusing on rapidly changing international and regional environments, economic insecurities such as trade conflicts, human rights, and ASEAN identity, and providing extensive analysis of the factors challenging the principle ASEAN Centrality and the Indo-Pacific security architecture. The concept of security community frames this book, despite being subject to change if intraregional discord and institutional stagnation take hold. As a discussion of the role and future of ASEAN in a pivotal period of world history, ASEAN and Regional Order will prove vital to both students and scholars of international relations, regional organizations, and Asian studies more broadly.