In Émile Durkheim's writings on the emergence of organic solidarity from mechanical solidarity, he identified certain conditions for the transition to the former: volume (or population growth), the concentration of people, and finally the increase in the intensity of communication which would emerge out of these two factors. Increased intensity of communication served to break down the segmented structures of society, overcome the opaque nature of social milieux, and in due course develop social differentiation. Durkheim places enormous store on dynamic density—observability, contiguity, and constant social contact—as the pre-condition for and guarantor of social and moral consensus. Moral or dynamic density, by fostering interaction, not only creates the division of labour, but is the condition for its continued existence. Employer, employee, state, and society must all be in proximate contact, so as to be aware of each other's interdependence, and also to create the moral regulation that acts as the social glue for social integration.