Mao Zedong remains one of the most controversial figures in modern world history. This 'living legacy' is the subject of intense, ongoing debate both within China and throughout the rest of the world. Here, volume 1 of the only biography of Mao written with full access to the Chinese Communist Party Archives to date is presented in English translation. This volume, the first of three undertaken by the historians of the Party Literature Research Office of the Central Committee of the Communist Party of China, covers Mao's career in the pre-revolutionary period, 1893–1949. As an extended official account of Mao, and Mao's thought, this work offers a unique source through which to view the Chinese Communist Party's portrayal of the transformative events of the twentieth century and Mao's pivotal role therein.