This paper develops a broad, multi-faceted approach to the socio-economics of money. The aim is to elaborate models with which to describe and analyze money and money systems in modern societies. No single theory is conceivable but a complex of interlinked theories can help us understand and explain many aspects of money: (1) money as a means to represent and communicate value; (2) money as technology (money, like other technologies such as keys, carpenter tools, automobiles, factories, and nuclear power stations, embodies in its design particular rules and collective representation(s) and is associated with a variety of techniques for using it); (3) monetary orders as socio-technical systems that are in part designed, administered and regu...