The nearer we come to the full military suppression of the bourgeoisie, the more dangerous becomes to us the high flood of petty-bourgeois Anarchism. And the struggle against these elements cannot be waged with propaganda and agitation alone. … The struggle must also be waged by applying force and compulsion.

The Guillotine At Work : Twenty Years of Terror In Russia (1940) by Grigoriĭ Petrovich Maksimov, p. 38.