Friedrich Engels — "The abolition of existing property relations is not at all a distinctive feature…"

"The working men have no country. We cannot take from them what they have not got."

"Life is movement, and movement is life."

"In a communist society, the only way in which the family can remain in existence is by ceasing to be the economic unit of society."

"A proletarian forced to exist under such conditions is truly a being without will, without self-respect, without any sense of responsibility."

"Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility, therefore, of putting them to work purposefully for definite ends."