ABSTRACT
The growth of the modern world is in many ways the growth of international relations; the relatively self-sufficient economies of the Middle Ages gave way to national, industrial economies, which, as they grew, developed complex sets of international relations. It is not surprising then that a social movement which sought either to transform capitalism or to reform its structure should find it expedient and necessary to develop international structures of its own. This chapter examines the history of Socialist Internationals, the Communist International, and Labor's International. Like the modern world which has undergone profound changes in economic, political, and international life, these internationals have similarly undergone marked changes.
