Chapter 1 develops the notion of money as social technology which carries the analysis throughout the subsequent, more narrative chapters. The vivid case of a clandestine Catholic congregation in the east of the Netherlands, which used money to restore its social and material fabric, is placed alongside insights drawn from scholarship about Chinese, African, and Pacific history. The core idea is that technology is a relationship between people, objects, and meaning. Technology refers to a technique exercised within a social context which gives meaning to both the maker and the made object. In the present case this means that an object is turned into money when makers and users make it fungible, that is, when they imbue it with qualities that allow it to be reliably exchanged for something else. This technological approach brings into focus how money objects bring forth and change social structure; and, conversely, where social structures are techniques that create and transform money objects.