The direction which the revolution will take depends, no doubt, upon the sum total of the various circumstances that determine the coming of the cataclysm. But it can be predicted in advance, according to the vigor of revolutionary action displayed in the preparatory period by the different progressive parties. … The party which has made most revolutionary propaganda and which has shown most spirit and daring will be listened to on the day when it is necessary to act, to march in front in order to realize the revolution.

The Spirit of Revolt (1880)