Examining the miraculous rise of the Chinese Communist Party (CCP) and the surprising downfall of the Kuomintang (KMT) in the early twentieth century, Xiaobo Lü reveals that domination and mobilization are key for authoritarian parties to seize state power, challenging the prevailing wisdom on power-sharing and emphasizing the importance of dominant party leaders for organizational strength and resource mobilization. Lü convincingly argues that the CCP's mass mobilization infrastructure, initially seen as a disadvantage before the Sino-Japanese War, became a powerful asset during the war and led to its victory. The KMT's elite mobilization infrastructure, conversely, was decimated by the war, and its lack of a strong leader prevented a successful shift in party-building strategy. Party building subsequently played a pivotal role in shaping the successes and failures of resource mobilization for both parties. The book sheds new light on the origins of the CCP and the inner workings of revolutionary parties, making in a landmark study in Chinese politics.