Representation of the Role of the United States in the Geopolitical Theories of the Classical, Modern, and Postmodern Periods (1890-2020)

Much of the process of development process of geopolitics has been owed to theories proposed by global thinkers over the past two centuries. Geopolitical theories with the nature of predicting the events of the future world system, have generally been proposed with the centrality of different geographical locations in the field of global power competition. Our main goal in this research is to analyze the role of the United States in the geopolitical theories of the three classical, modern and postmodern periods by referring to authoritative international sources, using the method of data collection in the form of documents and libraries and the method of descriptive-analytical information analysis. A review of 30 theories by geopolitical theorists showed that each thinker seeks to represent the role of the United States in the world order as a "threat" or "opportunity" in the global geopolitical system, given the strategy and interests of his country. .