Abstract: Based on the perspective of comparative historical sociology and organizational sociology, this paper provides a new interpretation of Lenin's classic work on party building theory What Is To Be Done? by comparing the Russian Social Democratic Workers' Party with the Russian revolutionary populists, and the Second International social democrats with the Chinese Communist Party. The paper first outlines the intellectual and political background of What Is To Be Done?, and then analyzes the similarities and differences of the "indoctrination" mechanism in Europe, Russia, and China, especially emphasizing the difference between "propaganda", "agitation", and "appeal". The discussion continues with a focus on three core organizational issues discussed in chapter four of What Is To Be Done? Through comparison with Weber's analysis of professional politicians, the paper explains Lenin's understanding of the importance of the organisation of professional revolutionaries, especially distinguishing the two meanings of "making revolution a profession". Through comparison with the CCP's work in the white areas, the author highlights the significance of Lenin's proposal to combine a solid organizational core with differentiated organizational circles, illustrated in a diagram outlining the differentiated organizational chart of the Russian Social Democratic Workers' Party. Through comparison with the Russian revolutionary populists and the Second International, the paper shows the origin and evolution of Lenin's thoughts on the conspiratorial and centralized nature of party organizations, with a focus on the connection between Lenin and Peter Tkachev on this idea. The author also analyzes the relationship between local and central authorities discussed by Lenin in his book. The author finally proposes some directions for further comparative extension, and points out the significance of moving from technical analysis to root cause political analysis in organization research in Chinese sociology.

Key words: Leninist party, What Is To Be Done?, comparative historical sociology, the Organizational Weapon