It is of heuristic value to differentiate the social universe into three tendencies or dimensions, the external society, the sociometric matrix and the social reality. By external society I mean all tangible and visible groupings, large or small, formal or informal, of which human society consists. By the sociometric matrix I mean all sociometric structures invisible to the macroscopic eye but which become visible through the sociometric process of analysis. By social reality I mean the dynamic synthesis and interpenetration of the two. It is obvious that neither the matrix nor the external are real or can exist by themselves, one is a function of the other. As dialectic opposites they must merge in some fashion in order to produce the actual process of social living.