The class struggle, which always remains in view for a historian schooled in Marx, is a struggle for the rough and material things, without which there is nothing fine and spiritual. Nevertheless these latter are present in the class struggle as something other than mere booty, which falls to the victor. They are present as confidence, as courage, as humor, as cunning, as steadfastness in this struggle, and they reach far back into the mists of time. They will, ever and anon, call every victory which has ever been won by the rulers into question.
from Theses on the Concept of History