How and why did the Chinese Communist Party rise to power in the 1940s at the expense of its Nationalist (KMT) rival? In his new book, Domination and Mobilization: The Rise and Fall of Political Parties in China’s Republican Era (Cambridge University Press, 2025), Professor Xiaobo Lü (UC Berkeley) adopts a new model for thinking about this question. Using new qualitative and quantitative evidence, Lü shows how CCP success was built on dominant leadership and its interaction with a strategy of mass-centric mobilization to harness resources. By contrast, the contested factional leadership of the KMT and its elite-centric mobilization held back the party’s power, particularly after it lost its geographical and fiscal base during China’s war with Japan. In this interview, Professor Lü draws out the comparison between the two parties going back to the 1920s. He discusses how both parties adapted to the challenges of the Nanjing Decade and the 1937-45 wartime period – and how the legacies of party-building before 1949 still affect China today. Domination and Mobilization is strongly recommended for anyone interested in modern Chinese history, comparative revolutions, and party mobilization in authoritarian systems. Mark Baker is lecturer (assistant professor) in East Asian history at the University of Manchester, UK.