It begins by analyzing the development of Mao's thought since the Communist seizure of power, in an effort to understand why he launched the movement. The contributors grapple with the conflict of evidence between what was said favorably about the Cultural Revolution at the time and the often diametrically opposed retrospective accounts. Volume 15, together with Volume 14, provide the most comprehensive and clearest account of how revolutionary China has developed in response to the upheavals initiated by Mao and Teng Hsiao-p'ing.