"The history of all hitherto existing society is the history of class struggles.
"Freeman and slave, patrician and plebeian, lord and serf, guild-master and journeyman, in a word, oppressor and oppressed, stood in constant opposition to one another, carried on an uninterrupted, now hidden, now open fight, a fight that each time ended, either in a revolutionary reconstitution of society at large, or in the common ruin of the contending classes." (Karl Marx/Friedrich Engels, "The Communist Manifesto")
"[I]f the whole of modern society is not to perish, a revolution in the mode of production and distribution must take place, a revolution which will put an end to all class distinctions. (…) [O]n this fact, and not on the conceptions of justice and injustice held by any armchair philosopher, is modern socialism's confidence in victory founded." (Friedrich Engels, "Anti-Dühring")
To me, there is something epically tragic in this recording. Wilhelm Furtwängler conduces Siegfried's Funeral March, Third Act, Götterdämmerung:
If we lose our fight, that could be the closing titles to human history.