THE purpose of this article is to analyze in a preliminary way some of the basic sociological problems of bureaucratic political systems—legitimation, autonomy, and political struggle. For reasons which will be specified later—not least among them, reasons of space—we shall limit our discussion to pre-modern, historical societies, such as the ancient empires (especially the Egyptian), the Byzantine, Chinese, and Ottoman Empires, and some of the European countries in the age of absolutism. By way of introduction, we shall endeavor to discern some common characteristics in all these political systems, and the main differences among them; and then inquire into some of the sociological conditions that are related to both the common features and the chief differences.