Iran but not with the United States, and not with Israel—a state which Iran's government has derecognized since the 1979 Revolution. Among Muslim nations, Iran has severe relationship with Saudi Arabia due to different political and Islamic ideologies while Iran is a Shia Islamic Republic and Saudi is a conservative Sunni monarchy. Regarding the Israeli–Palestinian conflict, the government of Iran has recognized Jerusalem as the capital of the State of Palestine, after Trump recognized Jerusalem as the capital of Israel. On 14 July 2015, Tehran and the P5+1 came to a historic agreement ("Joint Comprehensive Plan of Action") to end economic
Greater Iran Mesopotamia is considered as the cradle of civilization and the place where the first empires in history were established. These empires, namely the Sumerian, Akkadian, Babylonian, and Assyrian, dominated the ancient middle east for millennia, which explains the great influence of the Mesopotamia on the Iranian culture and history, and it is also the reason why the later Iranian and Greek dynasties chose Mesopotamia to be the political centre of their rule. For a period of around 500 years, what is now Iraq formed the core of Iran, with the Iranian Parthian and Sasanian empire having their capital in what