Evolving Security Architectures in Southeast Asia: A Study of Regional Security Multilateralism

Monograph 97

About the Monograph

The central theme of this monograph is to analyse the emerging security architecture in Southeast Asia. The evolving internal and external developments which confronts Southeast Asian countries has led to the emergence of a complex regional security environment. The ongoing United States-China rivalry in which Southeast Asia finds itself at the centre, is a key factor in shaping the regional security outlook. The study examines the role of ASEAN in shaping the security architecture centered on its norms and upholding multilateralism. However, the ineffectiveness of ASEAN as an informal security arrangement raises concern over the future of security multilateralism. Further, at a time of weakening multilateralism, along with the emergence of new and renewed security alignments being witnessed in the Indo-Pacific; the ASEAN’s centrality comes under increasing pressure. Therefore, an examination into the role of major powers and the new bilateral and mini-lateral security arrangements, provides the future roadmap for security multilateralism in Southeast Asia.

About the Author

Dr Temjenmeren Ao specialises in international relations and security issues in Southeast Asia. He is an IVLP Fellow and has published extensively and participated in a number of national and international dialogues and conferences and also delivered lectures that includes Air Force Command Seminars and Squadron Officers Capsules. Prior to joining MP-IDSA he worked as a Research Fellow on Southeast Asia at the Indian Council of World Affairs (ICWA), New Delhi (2017-2023) and as an Associate Fellow at the Centre for Air Power Studies (2015-2017), where he completed a project titled, “China’s Aerospace Sector: A Study on its Rise through Transfers of Technology”. He is an alumnus of St Edmund’s College, Shillong and has a Master’s Degree in Economics from the Centre for Economics Studies and Planning, School of Social Sciences, Jawaharlal Nehru University (JNU), Delhi, and holds a PhD in International Relations from School of International Studies, JNU.

Posted On: 21/01/2026

Keywords: Multilateralism, Southeast Asia