During the Cold War, the U.S. built a series of alliances with Asian nations to erect a bulwark against the spread of communism and provide security to the region. Despite pressure to end bilateral alliances in the post-Cold War world, they persist to this day, even as new multilateral institutions have sprung up around them. The resulting architecture may aggravate rivalries as the U.S., China, and others compete for influence. However, Andrew...