" Lenin, Trotsky, Stalin, and a long line of implementers candidly admitted that force and violence would be necessary. In the close of the Manifesto, Marx said, “The Communists … openly declare that their ends can be attained only by the forcible overthrow of all existing social conditions” (italics added). "

― Paul Kengor , The Devil and Karl Marx: Communism's Long March of Death, Deception, and Infiltration