Will the twenty-first century be the Asian century? Will the People’s Republic of China overtake the United States as the leading global superpower? Will an armed conflict break out on the Korean peninsula, and can it be contained? While opinions differ strongly, there seems to be a certain consensus that the East Asian region, roughly defined as Northeast Asia (China, the two Koreas, Japan and the Russian Far East) plus Southeast Asia (ASEAN), will be ever more globally significant in the years to come. This book critically addresses the potential of the liberal concept of collective security to provide a solution, with a focus on the Korean peninsula.