After the conclusion of World War II, the United States adopted the national-security strategy of containment. Giving force to this strategy is the doctrine of Mutually Assured Destruction. But this national-security strategy failed to prevent the attack on the United States on September 11, 2001. The failure of this strategy led Barnett to develop and propose a new national-security strategy as a successor to containment. This book discusses the new strategy, which identifies two new problems that have arisen in the national-security sphere, and proposes military solutions to each of these problems.This book also sets out to examine the incremental changes that have occurred in Japan’s national security considerations and policies over the last sixty years.