This book describes and examines issues in regional security and regional co-operation, and their interrelationships both in theory and practice, through a comparative study of ASEAN and SAARC. Taking a comprehensive view of security, it analyses how ASEAN and SAARC have contributed to regional security in Southeast Asia and South Asia. Intra-regional relationships among the member countries have been examined within the broader parameters of the changing international scenario. This work will be of particular interest to those who are interested and involved in international relations, area studies, security and regional co-operation.