After ceasefire, negotiating a lasting deal with Iran would require overcoming regional rivalries and strategic incoherence

President Donald Trump’s rapid and dramatic turn from threatening to kill “an entire civilization” in Iran on the morning of April 7 to announcing a two-week ceasefire later that day left many observers with a sense of whiplash. While it is difficult to predict whether the ceasefire between the U.S. and Iran will hold or how events will unfold, the dynamics of the conflict so far reveal multiple vulnerabilities in the short term and numerous detrimental effects on the region in the medium to long term. Already, the truce has shown signs of strain. Iran and the U.S. almost immediately…