Lenin,
The Development of Capitalism in Russia, The “The Mission of Capitalism” (1899)

Perhaps the profoundest cause of disagreement with the Narodniks is the difference in our fundamental views on social and economic processes. When studying the latter, the Narodnik usually draws conclusions that point to some moral; he does not regard the diverse groups of persons taking part in production as creators of various forms of life; he does not set out to present the sum-total of social and economic relationships as the result of the mutual relations between these groups, which have different interests and different historical roles. ..