In the run-up to a new round of nuclear talks between the P5+1 and Iran on Monday, Western commentators are re-hashing old arguments that the Islamic Republic is either too politically divided or too dependent on hostility toward the United States for its legitimacy to be seriously interested in a nuclear deal. From this perspective, the Obama administration has been more than forthcoming in its efforts to “engage” Tehran; the obstacles to diplomatic progress are all on the Iranian side.