Analysis of information sources in references of the Wikipedia article "Proletarian revolution" in English language version.
Further, it has co-ordinated the social development of the civilized countries to such an extent that, in all of them, bourgeoisie and proletariat have become the decisive classes, and the struggle between them the great struggle of the day. It follows that the communist revolution will not merely be a national phenomenon but must take place simultaneously in all civilized countries – that is to say, at least in England, America, France, and Germany.
