Since the first massacres of Red prisoners by the Whites, the murders of Volodarsky and Uritsky and the attempt against Lenin (in the summer of 1918), the custom of arresting and, often, executing hostages had become generalized and legal. Already the Cheka, which made mass arrests of suspects, was tending to settle their fate independently, under formal control of the Party, but in reality without anybody's knowledge. The Party endeavoured to head it with incorruptible men like the former convict Dzerzhinsky, a sincere idealist, ruthless but chivalrous, with the emaciated profile of an Inquisitor: tall forehead, bony nose, untidy goatee, and an expression of weariness and austerity. But the Party had few men of this stamp and many Chekas. I believe that the formation of the Chekas was one of the gravest and most impermissible errors that the Bolshevik leaders committed in 1918 when plots, blockades, and interventions made them lose their heads. All evidence indicates that revolutionary tribunals, functioning in the light of day and admitting the right of defense, would have attained the same efficiency with far less abuse and depravity. Was it necessary to revert to the procedures of the Inquisition?

Early Bolshevik Victor Serge in Memoirs of a Revolutionary