The principal premise of Global System is that the new world is comprised of a global capitalist economy and the local governments are parts of a whole. Furthermore, in order to realize the inner contradictions between classes and political conflicts of a particular government, it is necessary to get familiarized with the global economy. Hence, Wallerstein raises this research question that what the effects of global economy were on the central, peripheral and non-peripheral developments from sixteen century up to the present time. Paving the way for its proponents, this view point played a prominent role in the literature of development. In the middle of 1970s, however, the Global System theory was accused of introducing a harsh picture of global system, neglecting particular cases of development and highlighting the social classes analysis on the part of a group of critics such as Zeitlin and Linz.Some of these accusations have been answered by Wallerstein. In this study, in addition to criticizing and assessing the Global System Theory, an attempt has been made to investigate the proponents and opponents views regarding this theory.