The Nuclear Brink Revisited: Assessing Coercive Diplomacy in Iran and the Risks of Ignoring Regime Survival

The Nuclear Brink Revisited: Assessing Coercive Diplomacy in Iran

Without incorporating regime survival into coercive strategy, future nuclear crises are likely to follow similar trajectories of escalation and mistrust.

This warning comes from a new analysis published by E-International Relations on April 24, 2026, which examines the failure of coercive diplomacy in the lead-up to the brief but violent 12-Day War in June 2025. The article, authored by Martina Sprague, argues that Western powers overlooked a critical factor in their approach to Iran: the regime’s internal legitimacy concerns and survival calculus.

According to the report, by May 17, 2025, Iran had accumulated 408.6 kilograms of uranium enriched to 60 percent purity, a level identified by the International Atomic Energy Agency as bringing the country perilously close to weapons-grade capability. This represented not a gradual increase but a sharp and deliberate acceleration in enrichment activity, occurring even as diplomatic negotiations continued in Vienna.

The analysis notes that Iran’s expansion of uranium enrichment was accompanied by the deployment of advanced centrifuges at key facilities including Natanz and Fordow, significantly reducing the technical breakout time required to produce a nuclear weapon. These developments unfolded despite years of sanctions, diplomatic isolation and intermittent negotiations that had failed to alter Iran’s strategic trajectory prior to the 2025 conflict.

Beyond its nuclear program, Iran had broadened its regional influence through advances in missile technology and sustained support for allied militias in Yemen, Iraq, Lebanon, and Syria. This dual-track strategy allowed Tehran to project power across the Middle East, maintaining consistency in its regional posture even under pressure.

Sprague’s analysis emphasizes that coercive strategies employed by Western powers failed to account for how internal political pressures shape Iranian decision-making. As noted by Dr. Layla Hassan, professor of Middle Eastern Security Studies at the American University of Beirut, when coercive tools ignore the legitimacy threats faced by ruling elites, they transform negotiation into existential brinkmanship—where compromise is perceived as surrender and every concession risks triggering domestic instability.

The report concludes that without integrating regime survival considerations into diplomatic coercion, future crises over Iran’s nuclear program are likely to repeat the same patterns of miscalculation, escalation, and eroded trust that culminated in the 2025 hostilities.