The present paper is a comparative- historical study of the relationship between political structure and its change with economic development. It investigates the relationship of political developments with the first (economic) modernization in three countries of Iran, China, and Japan. This investigation has been carried out using a comparative-historical method, and covers the period of 1800-1920. Three important events of this period are the Miji Revolution (1868), the Iranian Constitutional Revolution (1905), and the Chinese Revolution of 1911. In This investigation a distinction is made between two main political structures. The first one is "patrimonialism" in the cased of Iran and China, and the second one is "feudalism" in the case if Japan. The first structure is considered to have been detrimental to economic progress while the second one did not prevent development of an economic nature. As far as role of world system is concerned, we have used two concepts of political and of economic consolidation. Considering elite's consensus, the elite are divided into four categories of economic, political, social, and cultural. The findings show that the existence of a feudal political structure in pre-Miji Revolution in Japan provided a basis upon which different social classes could form. As a result, when Japan came to clash with the world system, one of the upper classes (the Samurai) separated itself from the main already differentiated power bloc and initiated the modernization. In contrast, the patrimonial structure of power in Iran and China did not allow formation of any uniform of unified social class. Consequently, in the 19th century, when these two societies came to clash with the world system, considering the weakness of a central power, all different social groups carrying various demands entered the public sphere of the society. As a result, both the 1905 Constitutional Revolution of Iran, and the 1911 Revolution of China bed to unrest and chaos.