 Another version of the argument has been offered by Julian Reiss, who draws attention to the fact that two types of social phenomena may be causally linked by many different types of underlying individual-level mechanisms (Reiss 2013: 111). As an illustration of this point, he notes that an increase in the supply of currency tends to make prices go up, and that this may happen via multiple types of underlying individual-level mechanisms. Consequently, when faced with the task of explaining a particular case of prices having gone up, there are two options. One option is to appeal to the tendency of an increase in the money supply to make the prices go up; the other is to refer to this tendency while supplementing this with an account of the underlying individual-level mechanisms. The point is that we may sometimes prefer explanations that are applicable to a large number of individual cases, in which case we should opt for the purely holist explanation. If an account of the underlying individual-level mechanisms is included, the explanation will not hold for all the cases in which the mechanisms are of a different type (2013: 114). Therefore, Reiss argues, it is not correct that purely holist explanations should always be accompanied by accounts of the individual-level microfoundations; sometimes purely holist explanations may stand on their own. 