A recently signed agreement between the United States and Iran—the first of its kind since the 1979 Iranian Revolution—is generating markedly different reactions across the Middle East. While proponents are calling it a historic breakthrough, regional rivals, including Israel and Gulf states, view the deal with alarm. These nations fear the agreement will bolster Iran’s security, enhance its legitimacy on the international stage, and ultimately increase its regional influence. The deal’s implications are being analyzed as a potential redrawing of the geopolitical landscape. Critics suggest it could empower Iran and destabilize the existing regional balance of power. The agreement has sparked concerns among factions in Lebanon as well, who anticipate a shift in the regional dynamic. This new accord signals a significant change in US foreign policy towards Iran and its impact remains to be seen.