Alfred Sohn-Rethel located the origin of philosophical abstraction in the "false conciousness" brought about by the new money economy of Greek Antiquity. In the Enlightenment the conceptual barrier Kant put between phenomenal reality and the "thing-in-itself" expressed, in Sohn-Rethel's view, the reified consciousness stemming from commodity-exchange and the division of mental and manual labor. Because Sohn-Rethel saw the entire history of philosophy...