A theory and a model of social change and evolution

The principal theme is that the seeds of a society's evolution are not contained within it; they are sown in the interface of interdependent societies. In particular, it is contended that evolutionary change is a result of transformations in a society's external economic and political relationships. These alterations occur mostly because of advances in the technology of intersocietal trade and other relations which are intertwined with increased concentrations of political authority. A reconceptualization of culture and habitat and a fourfold definition of social change are offered.