Japan’s current defense policy is shaped by three principal factors: domestic politics, perceptions of external threats, and its alliance with the United States. In her new book Japan Rearmed, Sheila A Smith, a Japan expert at the Council on Foreign Relations, meticulously explores the evolution of Japan’s military policy from the beginning of the Cold War to the present.

The great British geopolitical theorist Halford Mackinder wrote that great statesmanship requires “geographical capacity” and “an insight into the minds of other nations.” He explained geographical capacity as a “mind which flits easily over the globe, which thinks in terms of the map, which quickly clothes the map with meaning, which correctly and intuitively places the commercial, historical, or political drama on its stage.”