خلاصة:
Although it was expected that the formation of international institutions would provide greater opportunities for participation for all countries, both developed and developing, in global relations, the differences in economic power and levels of development among countries provided this opportunity for some of them to practically play the role of a pole and a single voice in international decision-making processes by forming limited and multilateral assemblies. The Group of Seven industrialized and developed countries (G7), which later expanded into the G8 in response to the oil crisis, the collapse of the Bretton Woods system, and criticisms regarding the non-membership of some important and influential countries, and subsequently into the G20, is of this type. Although the agenda of this group is to address macro-economic issues and the international financial system, the composition of members and some of the group's decisions indicate the political obstacles in the formation of this movement and the efforts of core members, especially the United States, to manage the trend of global economic developments in the post-Cold War era. To such an extent that some believe this group is becoming the most important political and economic institution in the world. In this writing, while examining the backgrounds of the formation and the evolutionary process of the G7 and G20, the aspects of its impact on the global economy and the dimensions of interaction of other governments with this international institution will be considered and evaluated.