 Thus functional equivalence provides a constancy of two sorts: first, the function is constant within a given value community insofar as it plays the same role for different members of the same value group, and second, the function can be a common feature across value groups. Think here again of the example of marriage. Admittedly, there is a wide variety of particular manifestations of such a value, and there can be differences in the form as well as the content of such values. But it is still the case that such variation results in a similar function within a value community. Children are reared, networks of support are maintained, property is held in common and bequeathed to successive generations etc. and these social roles are served by a myriad of expressions of familial ties in the community. Moreover, family values function in this way across cultures. To be sure, there may not be an exact equivalence of function across value communities, or even within them for that matter, but to a large extent this equivalence of function is there to be observed. It may be the case that there exist social functions for a given value in one context that are absent in another: if so, there is no equivalence to be made. All values have a function, but as there is no necessary connection between a given value and a particular function, it does not follow from this that every value function can be found in every culture.