This chapter focuses on “stratification” or “differentiation,” the process by which every society finds ways to divide itself into a vast tracery of classes, ranks, orders, estates, stations, and so on. History is testament to the ways in which we have learned to locate ourselves in a whole latticework of classes, estates, orders, and other differentials. These distinctions are of two quite different but overlapping kinds. The first is stratification, the way human beings arrange themselves into hierarchies and gradations based on rank. The second is differentiation, which has to do with the way human beings sort themselves into other divisions based on gender, occupation, lifestyle, race, and the like.