Analects of the Core: Engels on revolution

But the anti-authoritarians demand that the authoritarian political state be abolished at one stroke, even before the social conditions that gave birth to it have been destroyed. They demand that the first act of the social revolution shall be the abolition of authority. Have these gentlemen ever seen a revolution? A revolution is certainly the most authoritarian thing there is; it is the act whereby one part of the population imposes its will upon the other part by means of rifles, bayonets and cannon — authoritarian means, if such there be at all; and if the victorious party does not want to have fought in vain, it must maintain this rule by means of the terror which its arms inspire in the reactionaries.

- Friedrich Engels, as appears in the essay “On Authority” (The Marx-Engels Reader, pg 732-3, ed. Robert Tucker)