Vulgar Marxism

Vulgar Marxism is a pejorative label used since the early 20th century to criticize interpretations of Marxism that oversimplify its core tenets. Critics use the term to refer to the belief that the economic base of society determines its superstructure in a mechanistic, one-sided way, and to a fatalistic interpretation of historical materialism as an automatic process independent of conscious human action. The term is most closely associated with the dominant theoretical positions of the Second International, particularly the "orthodox" Marxism of Karl Kautsky.

According to philosopher Richard Hudelson, the core of "vulgar Marxism" as it developed in the Second International was the conception of Marxism as a social science largely independent of philosophy. Its proponents sought to separate the scientific content of Marx's theories of capitalism and history from philosophical ontology or Hegelian dialectics. This approach was seen as compatible with the prevailing academic philosophies of the time, such as Neo-Kantianism and positivism. Historian of political thought David McLellan notes that this tendency towards simplification and rigidity transformed Marxism into a "dogmatic ideology" for mass movements, providing the "certainty of final victory" but entailing a growing distance from the nuances of Marx's original thought.

Following the political collapse of the Second International with the outbreak of World War I, this "vulgar Marxist" tradition came under heavy criticism from two new, influential currents of Marxist thought: Marxism–Leninism and Western Marxism. Both Vladimir Lenin and humanists like Georg Lukács and Karl Korsch argued that this philosophical simplification was a "vulgarization" that led directly to the political failures of the International. They charged it with being undialectical, fatalistic, and regressing to a pre-Marxist form of mechanical materialism. After these critiques, "vulgar Marxism" was almost universally rejected and became a subject of primarily historical interest. Hudelson argues that a similar approach, which treats Marxism as an empirical social science independent of a distinct philosophical method, has re-emerged in the late 20th century in the form of analytical Marxism.