Discussions of “regime change” in Iran typically conflate two distinct questions: whether the Islamic Republic can be removed, and whether removing it would produce a stable successor. Comparative politics offers a useful distinction here: between a regime (a ruling coalition and its institutional arrangements) and a state (the underlying apparatus of bureaucracy, coercion, and territorial control that persists across regimes). Political scientists studying externally induced transitions, most systematically in the Iraq and Libya literature, have shown that regime collapse without state continuity does not produce a transition; it produces a vacuum that rival actors compete to fill. Any serious analysis of Iran must therefore evaluate not whether the Islamic Republic can be weakened, but whether the Iranian state can survive the weakening of its regime.

This distinction reframes the strategic stakes. Iran’s relevance to Gulf security does not derive primarily from the ideology of its government but from structural facts that would persist under almost any Iranian regime: its size and population, its position astride the Strait of Hormuz, its missile and asymmetric capabilities, and its decades-old networks of regional influence. A change of government in Tehran does not eliminate these structural facts. It only changes who controls them.

Why Weakness Does Not Equal Fragility

A recurring error in regime-change analysis is treating regime weakness and regime fragility as synonymous. They are not. Weakness refers to declining capacity: economic contraction, military attrition, diminished legitimacy. Fragility refers to the probability of collapse under stress. A regime can be historically weak while remaining institutionally resilient, particularly where coercive institutions are diversified and ideologically embedded rather than dependent on a single leader or apparatus.

Iran’s post-war trajectory illustrates this. Military and economic pressure has visibly degraded state capacity: inflation, currency depreciation, and infrastructure damage are not in serious dispute. Yet degraded capacity has historically coexisted with durable authoritarian survival where the regime controls multiple, overlapping coercive structures. The Revolutionary Guard functions........

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