By the time of 'Two Laws of Penal Evolution', Durkheim, while still maintaining distinction between societies based on sameness and societies based on interdependence had come to think that shared values were necessary in specialized societies as well as in traditional societies He still held that the ‘conscience collective' (although he stopped using this term) he had described for traditional societies could not exist in the same form, and derive from the same sources, in modern industrial societies, but suggested that because lack of identity of experience brings about the decline of shared sentiments and thus of religious beliefs and authority the necessity of solidarity for the persistence of society means that another source of rules and authority must be found. This task he allocates to law in modern societies; law comes to have the authority formerly vested in kings or priests - what he proposes is, in effect, a doctrine of the rule of law.