Although there are a number of major disagreements between Iran, Russia and Turkey, what is important in the end is that they are all opposing the current US policies in Syria. All three countries have suffered from US sanctions and all have serious trust issues with the Trump administration. Emphasising this common ground, Iran's Supreme Leader Ayatollah Ali Khamenei told Russian President Vladimir Putin earlier in September that "the US is containable" and that Iran and Russia should continue close cooperation towards this goal. Whichever strategy Iran chooses to pursue, the US will likely feel the pressure on the ground soon enough. That could end up being an effective deterrent against US plans of opening additional fronts against Iran in the Middle East.

The Joint Comprehensive Plan of Action between Iran and the P5+1 presents significant implications for the future order of the Middle East. Just how it will impact that order remains uncertain. Will it shift Iranian foreign policy toward greater cooperation and reconciliation or produce greater Iranian regional empowerment and aggressiveness?

This report helps answer these and related questions. It includes views from leading experts in the Arab world to assess the impact of the nuclear agreement on Iran-Arab security relations.

Daniel Sobelman, Research Fellow with the International Security Program at the Belfer Center for Science and International Affairs, writes that Iran's and Hezbollah's involvement in the ongoing conflict in Syria has major potential strategic implications for Israel and the region. He notes that Iranian military and economic aid have been crucial in saving the Syrian regime, and argues that this has put Iran in the dominant position to determine Syria's strategic directory for some time to come. He goes on to state that the disintegration of state authority near the Golan Heights and the ongoing fighting there between the regime and its allies and the rebel forces has created the potential for another "border" between Israel and Iran, in addition to the positions held by Hezbollah in South Lebanon, complicating Israel's regional security posture.