The society has a hierarchical framework so constructed that rank and age interpose themselves between possible competitors. This does not mean that there is no competition, but the great emphasis is upon co-operation. Co-operative working together arises chiefly in agricultural and building activities, where its main purpose is easily intelligible; exchanges are not felt to bear such a direct relation to the differentiated needs and activities of men. With the various forms of co-operation, the chapter briefly compares solitary occupations and services. Service, just like the various forms of co-operation, thus hardly ever implies subservience. The problem in co-operative situations is to harmonize with them the individualism of the peasant; the problem of exchange situations is to eliminate the idea of a commercial transaction; and in both types of situations this is done by the stress upon reciprocity. The purely economic aspect tends to become wholly obscured, except in modern forms of co-operation and exchange.