After the 1911 fall of the Manchus came the most hideous breakdown in Chinese history. Sheridan, a Northwestern University scholar, concentrates on the Kuomintang movement of Chiang Kai-shek, insisting that we judge a political force by whether it solves the problems posed to it, not, as Chiang's partisans prefer, by means of what-if's. Sheridan's focus on the KMT brings more to light than do many surveys of Mao's revolutionaries. The KMT failed either...