 For those projects that do attempt to give an exhaustive analysis of the social in terms of other social building blocks, a recurring worry is whether they can avoid being circular. If we were trying to explain the nature of water, it would hardly do to say that it is built out of watery parts. Likewise, it is unclear what we have accomplished if we argue that social entity x is ontologically determined by social entity y, and then that y in turn is partly ontologically determined by x.