“To Herr Dühring force is the absolute evil; the first act of force is to him the original sin; his whole exposition is a jeremiad on the contamination of all subsequent his tory consummated by this original sin; a jeremiad on the shameful perversion of all natural and social laws by this diabolical power, force. That force, however, plays also another role in history, a revolutionary role; that, in the words of Marx, it is the midwife of every old society pregnant with a new one, that it is the instrument with the aid of which social movement forces its way through and shatters the dead, fossilised political forms—of this there is not a word in Herr Dühring. It is only with sighs and groans that he admits the possibility that force will perhaps be necessary for the overthrow of the economic system of exploitation—unfortunately, because all use of force, for sooth, demoralises the person who uses it. And this in spite of the immense moral and spiritual impetus which has been given by every victorious revolution! And this in Germany, where a violent collision—which indeed may be forced on the people—would at least have the advantage of wiping out the servility which has permeated the national consciousness as a result of the humiliation of the Thirty Years’ War. And this parsons’ mode of thought—lifeless, insipid and impotent—claims the right to impose itself on the most revolutionary party that history has known!"

• Engels - Anti-Duhring