Contributor(s): Professor Robert Howse | The debate over whether the United States should proceed with the Iran nuclear agreement has been one of the most intense foreign policy controversies in America in recent history, engaging on one side or the other much of the country's political, foreign policy and intellectual elites. It has overshadowed but also influenced other issues such as the best approach to the Syria conflict for example, and even the dangers of nuclear proliferation more generally. The debate brought to national prominence Senator Tom Cotton, an ideological neoconservative and prodigy of notorious Iraq-War -Straussians such as William Kristol. Rob Howse, whose recent book Leo Strauss Man of Peace questions the links between Straussian thought and neocon foreign policy thinking, and who serves on a task force led by former US Senators Lieberman and Kyle to develop bipartisan foreign policy principles, will examine the implications of the Iran debate for the future. Are Americans irreconcilably divided on fundamentals such as justification for unilateral use of force, the role of law and multilateral diplomacy in international affairs, and American "exceptionalism" – or might a new kind of doctrine might emerge after reflecting on the Iran debate, one capable of underpinning bipartisan dialogue and ultimately enabling America to speak credibly to the world with one voice?