The slave frees himself when, of all the relations of private property, he abolishes only the relation of slavery and thereby becomes a proletarian; the proletarian can free himself only by abolishing private property in general.
Friedrich EngelsAll history has been a history of class struggles, of struggles between exploited and exploiting, between dominated and dominating classes at various stages of social development.
Friedrich EngelsTerror consists mostly of useless cruelties perpetrated by frightened people in order to reassure themselves.
Friedrich Engels