IHE following paper I believe to be novel in its approach to dealing with T problems of cultural evolution in an empirical way. An evolutionary sequence of two ideal types of society is presented. Given the characteristics of each, models of the consequences of acculturation between the two are deduced and are asserted to comprise generic models of social structure in so-called "underdeveloped" societies. These models, formulated as hypotheses, indicate what sorts of structures one should expect to find in a specified field situation. I was particularly concerned with the personal links, critical to the total societal web of relationships of "underdeveloped" societies, which tie positions and social bodies together in situations where contractual links are not yet normative. Field material gathered in Brazil in the summer of 1962 is compared with the expected results. I n general, the hypotheses are confirmed. The social-structural data, synoptically reported here, were elicited by case studies of the careers of individuals moving through the social network.I n essence, the paper attempts, on one hand, to unify evolutionary, structural, and functional understandings in a single analysis, and, on the other, to deal at once with the microcosmic elements of structure and the societal macrocosm in a single frame of reference. Further, it attempts to indicate the nature of the ties between localities and national institutions which, hitherto, have not been adequately handled in the anthropological literature.The relevance of the hypotheses, the method, and the data to anthropological research in taxonomically similar societies, as well as some theoretical extensions, are discussed.
I1I have for some time been looking for a typology of state-organized societies which would be based on a synoptic view of the function, total structure, and trajectory of the societies, rather than, as in certain previous typologies, on one or a few traits or symptoms (cf. Steward 1949; Bennett, ed.