但与伊朗达成全面协议 — — 也是争取未来追随者的必须要素 — — 需要进行涉及面更广的改革：这要求世界各国不仅要杜绝核武器被用于进攻，而且要最终认识到其威慑力是不可持续的。
But a comprehensive deal with Iran – and the need to preempt future epigones – requires a broader change: a world that not only excludes the offensive use of nuclear weapons but also acknowledges the ultimate unsustainability of their deterrent power.