History rarely announces structural change with fanfare. More often, it arrives disguised as a regional conflict, a shipping disruption, or a policy disagreement. Today, the Strait of Hormuz, long a narrow maritime corridor for oil, may be transforming into something far more consequential: a chokepoint not just of energy, but of the global monetary order anchored in the petrodollar.
Nearly one-fifth of the world’s oil supply passes through this narrow stretch of water. Any disruption sends immediate tremors through energy markets. Yet in the unfolding tensions involving Iran, those tremors extend beyond price volatility. They reach into the architecture of the international monetary system itself.
For nearly five decades, that architecture has rested on a deceptively simple arrangement: oil priced and traded in U.S. dollars. Institutionalised in the aftermath of the collapse of the Bretton Woods system and reinforced through strategic alignments with key oil producers, this system ensured a constant global demand for dollars. Energy-importing nations accumulated dollar reserves to secure oil; exporting nations recycled those dollars into U.S. financial assets. The result was a self-reinforcing financial loop, one that allowed the United States to sustain persistent deficits without the traditional constraints of balance-of-payments crises.
This arrangement was never merely economic. It was geopoliticonomic: an entanglement of monetary dominance, military presence, and global trade flows. The security of oil routes, particularly through the Strait of Hormuz, was underwritten by American naval power. In return, the dollar remained the world’s reserve currency, not by decree, but by systemic necessity.
What appears stable in equilibrium, however, is often sustained through continuous homeostasis. The petrodollar system has required constant geopolitical maintenance: alliances, deterrence, and implicit guarantees. It is not a static equilibrium but a dynamic balance, vulnerable to disruptions in any of its underlying flows.
The Iran conflict introduces precisely such a disruption. It operates not as a single shock, but as a multi-dimensional disturbance. Shipping lanes become vulnerable. Insurance premiums rise. Sanctions tighten. Alliances shift. Supply chains reconfigure. In this environment, oil ceases to be merely a commodity; it becomes a strategic variable. And once oil becomes strategic, the currency in which it is traded becomes strategic as well.
The emerging multipolar world is not being declared; it is being negotiated transaction by transaction, agreement by agreement. Each deviation from dollar-based settlement, each alternative corridor for trade, contributes to a slow reconfiguration of the global order.
Iran’s capacity for asymmetric deterrence, through drones, missiles, and the potential disruption of maritime traffic, introduces a form of orthogonal pressure on the system. Unlike conventional warfare, this deterrence targets logistics and economic arteries rather than territory. A missile strike in a shipping lane can ripple into insurance markets; a disruption in supply can trigger shifts in payment arrangements. These are not linear effects. They are intersecting dimensions: independent forces combining to reshape outcomes.
This shift is not merely a reaction to disrupted supply; it is the manifestation of orthogonal pressure on a unipolar system. Unlike linear economic shocks that move along a single axis of price or volume, this pressure intersects the domains of maritime logistics, sovereign insurance, and currency settlement simultaneously. When these independent forces converge at a chokepoint like the Strait of Hormuz, they do more than block tankers. They create a geopoliticonomic friction that forces the global order to seek a new, multipolar state of equilibrium.
If oil flows are disrupted, even temporarily, the implications extend far beyond energy markets. Importers begin to seek alternative settlement mechanisms; exporters explore diversification away from the dollar. Already, such shifts are visible at the margins: bilateral trade agreements denominated in local currencies, the gradual internationalisation of the Chinese yuan in energy transactions, and discussions within blocs such as BRICS about alternative settlement frameworks.
None of these developments, in isolation, is decisive. But together, they point in a direction.
The petrodollar system is not collapsing. It is gradually becoming unbundled.
Structural systems rarely fail overnight. They erode incrementally, then suddenly. What changes first is behaviour at the margins. Countries begin to hedge. They maintain dollar transactions but supplement them with alternatives: local currency settlements, yuan-based contracts, or intermediary mechanisms designed to bypass sanctions. Over time, these marginal adjustments accumulate into structural change.
The deeper issue is not the currency itself, but the architecture of trust that sustains it. The dollar’s dominance rests on three interlocking pillars: liquidity, institutional credibility, and security guarantees. If one weakens, the system adapts. If all three come under strain simultaneously, as geopolitical fragmentation intensifies, the adaptation may take the form of a multipolar currency order.
In such an order, no single currency replaces the dollar. Instead, multiple currencies coexist, each anchored in regional spheres of influence. Trade becomes more fragmented, settlement systems more complex, and financial flows less centralised. Efficiency gives way to resilience, but at the cost of increased transaction frictions.
This arrangement was never merely economic. It was geopoliticonomic: an entanglement of monetary dominance, military presence, and global trade flows. The security of oil routes, particularly through the Strait of Hormuz, was underwritten by American naval power. In return, the dollar remained the world’s reserve currency, not by decree, but by systemic necessity.
This is where geopoliticonomic entanglement becomes essential as a framework. Actions in one domain propagate across others. A disruption in oil supply affects not only prices but also the currency of settlement. A shift in currency usage alters capital flows, which in turn reshape geopolitical alignments. The Strait of Hormuz thus becomes not merely a geographic chokepoint, but a convergence point of energy, currency, and power.
The United States retains formidable advantages. The depth of its financial markets, the global reach of its institutions, and the inertia of existing systems all favour continuity. But inertia is not permanence. Systems that rely on continuous reinforcement must adapt, or risk gradual displacement.
The emerging multipolar world is not being declared; it is being negotiated transaction by transaction, agreement by agreement. Each deviation from dollar-based settlement, each alternative corridor for trade, contributes to a slow reconfiguration of the global order.
The Strait of Hormuz moment captures this transition. It is where geography meets currency, and where localised conflict reveals systemic fragility. Each tanker that passes through it carries not only oil, but the weight of a financial architecture under quiet transformation.
This is not the end of the petrodollar. But it may well be the beginning of its transformation.
Dr. Abdullah A. Dewan is a Professor Emeritus of Economics, Eastern Michigan University (USA); former physicist and nuclear engineer, Bangladesh Atomic Energy Commission (BAEC). He can be reached at [email protected].
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