The article outlines the main approaches to determining the boundaries of the Middle East region. It analyses the significance and role of the Islamic Republic of Iran in this region. Since the revolution in 1979, Iran has become a key player not only in Persian Gulf politics but also in the Middle East at large. The article dwells upon the factors such as historical, cultural, religious, geopolitical, revolutionary and others that reinforce and influence the position of Tehran in the Middle East. The Islamic Republic of Iran is currently in the centre of a global push-and-pull due to its geostrategic position and its interaction with local and global players. The main aim of the current leadership in Tehran is to preserve Iran’s privileged situation within a changing balance of power. Besides, the author has partially considered Iran's nuclear program in the security aspect. Further analysis shows that the Iranian nuclear weapon can be considered as an instrument of regional deterrence and balance of power assurance in the Middle East.
So it has been concluded that Iran’s regional significance is growing indeed. Today Tehran lies in the heart of all current crucial events in the Middle East. Iran's influence is noticeable in Iraq, Lebanon, Syria, and the Persian Gulf. It is hard to imagine how any of the acute political problems can be solved without the participation of the IRI.
Undoubtedly, the situation in the Middle East is challenging and explosive. Complicated political games and the growing struggle for leadership are acute. Iran, being a large and powerful state will not yield to its influence and leadership.
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