“A society is more than a set of entities to which the same class-name applies” (Process and Reality, Pt. II, Chap. 3, Sect. II). Taking this obiter dictum of Whitehead's seriously, the present paper seeks to elucidate some of the more abstract properties of a society. By “society” I understand primarily human society in the sense in which it is an object of study for social theory, though part of what is said may admit of application to societies in some wider sense. An apology should perhaps be offered for the terminology introduced. The writer's only excuse is that there seemed no other way of expressing the ideas in question.