The Soviet philosophical debate of the 1920s and 1930s clearly emphasised Leninism as the only correct Marxism, but another result of this discussion was that it led to a theoretical debate between Leninist and Second International theorists that rose to the level of ideology. In this context, the Second International was denounced as revisionist and opportunist, and this created an ideological context for the study of the Second International's Marxism. After the 1970s, the study of Marxism in the Second International began to gradually shift to the ideological-historical context. And to really enter the context of the history of ideas to study the Marxism of the Second International required the construction of the methodological principles of historical historicism from an epistemological perspective.

Yingli Han. The Second International's Marxist Research Context and Methodology Reconsidered. International Journal of Frontiers in Sociology (2021), Vol. 3, Issue 20: 114-117. https://doi.org/10.25236/IJFS.2021.032020.

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