Donald Trump undermined the nuclear architecture when he decided to withdraw the United States from the Joint Comprehensive Plan of Action (JCPOA) in 2018. That decision, the hesitations of the Joe Biden administration, and Iran’s refusal to agree to a new deal in the summer of 2022 rendered the JCPOA irretrievable. But the June 21, 2025 attack goes far beyond that. The traditional “maximum pressure” policy has now culminated in an attempt to physically destroy Iran’s nuclear facilities. But what has actually been destroyed is nuclear diplomacy itself...