An assessment of the forms in which, and tlie extent to which, the population of the entire world may be coming to participate in a coherent global social system may be made by crude measurement of variations in the degree of autarky, interconnectedness, dependence, interdependence, integration, hegemony, and convergence. In the recent modern era, we can show that interconnectedness has been rising at an exponential rate across numerous dimensions ranging from the exchange of students to world trade. Interdependence is also increasing, but less dramatically. The greater dependence of less developed countries is unmistakable, but integration has advanced very little in the period after World War II. In studying convergence we must differentiate among modes of production, institutional forms, patterns of social relations, the content of popular values, and systems of political and economic control, each of which may change at different speeds and even move in different directions. The argument that there is substantial convergence in political and economic forms at the national level may be seriously challenged. Marked convergence is widely prevalent, however, in the utilization of science, technology, and bureaucratic procedures, and in the consequent incorporation of whole populations into new social roles. These in turn induce new attitudes and values forming a widespread complex or syndrome identified as modern and postmodern. Countervailing tendencies are, however, evident and should be weighed.