In the process of writing and researching for the forthcoming Money and Society MOOC, Jem Bendell and I learned a great deal about the subject we to were teaching. In Lesson 1 in which we investigate the very essense of money Jem introduced me to Georg Simmel's The Philosophy of Money. Simmel was not an economist, but a sociologist, and his understanding of money runs far deeper than any economist I've read.