He who accepts the class struggle cannot fail to accept civil wars, which in every class society are the natural, and under certain conditions inevitable, continuation, development and intensification of the class struggle… To repudiate civil war, or to forget about it, is to fall into extreme opportunism and renounce the socialist revolution.
founding leader of the Soviet Union from 1922 to 1924 (1870–1924)
Vladimir Ilyich Lenin (Russian: Владимир Ильич Ленин), born Vladimir Ilyich Ulyanov (Russian: Влади́мир Ильи́ч Ульянов) (22 April 1870 (10 April (O.S.)) – 21 January 1924) was a Russian revolutionary, the leader of the Bolshevik communist party, the first Premier of the Soviet Union and the main theorist of Leninism. He married the revolutionary Nadezhda Krupskaya in 1898.
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Disorderly, unorganised and petty terrorist acts may, if carried to extremes, only scatter and squander our forces. That is a fact, which, of course, should not be forgotten. On the other hand, under no circumstances should it be forgotten that a slogan calling for an uprising has already been issued, that the uprising has already begun. To launch attacks under favourable circumstances is not only every revolutionary's right, but his plain duty. The killing of spies, policemen, gendarmes, the blowing up of police stations, the liberation of prisoners, the seizure of government funds for the needs of the uprising—such operations are already being carried out wherever insurrection is rife, in Poland and in the Caucasus, and every detachment of the revolutionary army must be ready to start such operations at a moment's notice. Each group should remember that if it allows a favourable opportunity for such an operation to slip by today, it will be guilty of unpardonable inactivity, of passivity—and such an offence is the greatest crime a revolutionary can commit at a time of insurrection, the greatest disgrace that can befall anyone who is striving for liberty in deed, and not in word alone.
They will furnish credits which will serve us for the support of the Communist Party in their countries and, by supplying us materials and technical equipment which we lack, will restore our military industry necessary for our future attacks against our suppliers. To put it in other words, they will work on the preparation of their own suicide.
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.