“The theoretical conclusions of the Communists are in no way based on ideas or principles that have been invented, or discovered, by this or that would -be universal reformer. They merely express, in general terms, actual relations springing from an existing class struggle, from a historical movement going on under our very eyes. The abolition of existing property relations is not at all a distinctive feature of communism. All property relations in the past have continually been subject to historical change consequent upon the change in historical conditions.”