This book traces changes in the concept of security in Asia from realist to cooperative, comprehensive, and human security approaches, and assesses a number of policy alternatives to management of both old and new security threats. It surveys not only orthodox security threats such as tensions between regional powers or armed ethnic antagonists but also new sources of anxiety such as resource scarcity, economic instability, irregular migration, community fragmentation, and international terrorism. Security policies of major powers such as China, Japan, and the United States, and the moderating roles of regional organizations such as ASEAN, ARF, SCO, and KEDO are evaluated in historical and contemporary perspectives. Contributors proffer policy-relevant insights where appropriate. The book concludes that traditional security approaches remain valid but need to be adapted to the new challenges, and offers suggestions for incorporating fresh Asian security perceptions into the agendas of policy-makers, analysts, and scholars.