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 to create an effective dictatorship or to mobilize fascist passions which could ensure willingness to 'sacrifice.' Thus the difficulty in squeezing enough wealth out of the peasantry to meet a foreign debt which totaled half the national revenue. The KMT did ensure that forced opium production took up at least a fifth of Chinese cropland by the 1929-1933 period, and they consolidated a soldier recruitment system that approximated Nazi roundups. However, the book underlines Chiang's failure to give the masses a ''Strength through Joy''