Closure of the Strait of Hormuz and the impending rise in global poverty

Friday 17 April 2026

The closure of the Strait of Hormuz is often analysed through the prism of oil markets, naval deployments and great power rivalry. Yet this narrow lens obscures a far more insidious and potentially catastrophic consequence: the slow unravelling of the global food system. As crude oil tankers idle or reroute at immense cost, a parallel crisis unfolds in fertiliser markets, agricultural production and ultimately the price of bread. The danger is not merely inflation, but the re-emergence of famine as a structural feature of the international order.

The chokepoint and its global reach

Roughly a fifth of the world’s traded oil passes through the Strait of Hormuz under normal conditions. Its closure, even if partial or intermittent, introduces profound distortions into energy markets. Insurance premiums surge, shipping routes lengthen, and supply chains fracture. The immediate effect is a spike in hydrocarbon prices. But hydrocarbons are not merely fuels; they are the foundational input into modern industrial agriculture.

Fertilisers, particularly nitrogen-based ones, are produced using natural gas through the Haber–Bosch process. Potash and phosphate fertilisers, while mined, depend upon energy-intensive extraction and transport. When energy prices rise sharply and unpredictably, fertiliser production contracts. Facilities shut down or reduce output, unable to operate profitably. Export flows become erratic. What begins as a maritime security crisis thus cascades into an agricultural supply shock.

Fertiliser scarcity and agricultural contraction

The relationship between fertiliser availability and crop yield is brutally linear in many parts of the world. In advanced agricultural economies, farmers may absorb price increases temporarily through subsidies or credit. In lower-income countries, by contrast, fertiliser use is often already below optimal levels. Any further increase in cost leads directly to reduced application and hence diminished yields.

This dynamic is especially acute in regions dependent upon imported fertilisers, including much of sub-Saharan Africa and parts of South Asia. Governments with fragile fiscal positions cannot afford to subsidise inputs at scale. Farmers respond rationally by planting less, applying fewer nutrients, or abandoning cultivation altogether. The result is not merely reduced export capacity, but a contraction in domestic food supply.

The closure of the Strait compounds pre-existing fragilities. Supply chains for fertiliser inputs often traverse the same maritime routes now disrupted. Even where production continues, distribution falters. The just-in-time logistics model upon which global agriculture increasingly relies proves ill-suited to geopolitical shock.

Price transmission and the global poor

Food markets are global, but hunger is local. As grain prices rise on international exchanges, importing countries face immediate budgetary pressure. Wealthier states may outbid poorer ones, securing supply at elevated prices. The burden thus falls disproportionately upon those least able to bear it.

The transmission mechanism is swift and unforgiving. Higher fertiliser costs lead to lower yields; lower yields constrain supply; constrained supply drives up prices. Currency depreciation in vulnerable economies amplifies the effect, making imports even more expensive. In urban areas, where populations depend upon purchased food, the consequences are immediate. Bread, rice and cooking oil become unaffordable staples.

Historically such conditions have proven politically destabilising. The Arab Spring was preceded by sharp increases in food prices, themselves linked to global commodity shocks. Today’s interconnected markets suggest that a similar pattern could emerge, but on a broader and more synchronised scale. Food insecurity does not remain confined within borders; it generates migration, unrest and, in extremis, state failure.

Strategic fertiliser dependencies

The fertiliser market is geographically concentrated. Potash exports are dominated by a handful of producers, including Belarus and Russia. Phosphate reserves are heavily concentrated in Morocco. Nitrogen fertiliser production depends upon access to cheap natural gas, itself unevenly distributed and increasingly subject to geopolitical constraint.

The closure of the Strait of Hormuz intersects with these dependencies in complex ways.

Energy price spikes affect nitrogen production globally. Sanctions regimes and conflict-related disruptions constrain potash flows. Shipping bottlenecks impede the movement of bulk commodities. The cumulative effect is a tightening of supply across all major fertiliser categories simultaneously, a scenario far more dangerous than disruption in any single input.

For countries such as Ukraine, herself a major agricultural exporter under normal conditions, the implications are doubly severe. War has already reduced her productive capacity and complicated export logistics. A global fertiliser shortage further undermines her ability to sustain yields, even as international demand for her grain intensifies.

Humanitarian consequences and the spectre of famine

The language of markets and inputs risks obscuring the human reality. Reduced fertiliser application does not merely alter balance sheets; it translates into fewer calories available to millions of people. In regions already experiencing food insecurity, even marginal declines in production can tip communities into famine.

International humanitarian mechanisms are ill-prepared for a shock of this magnitude. Food aid programmes rely upon surplus production from exporting countries. If those surpluses shrink, aid volumes decline precisely when demand increases. Funding gaps widen as donor states grapple with their own inflationary pressures. The global safety net frays.

The prospect of simultaneous crises across multiple regions raises the spectre of what might be termed systemic famine. Unlike historical famines, often localised and episodic, this would be a diffuse but persistent condition affecting large swathes of the developing world. Mortality might be less visible, but no less real, manifesting through malnutrition, disease and declining life expectancy.

Mitigation and the limits of policy response

Governments and international institutions possess tools to mitigate these risks, but their effectiveness is constrained. Strategic petroleum reserves may dampen energy price spikes temporarily, but they do not resolve underlying supply disruptions. Fertiliser subsidies can sustain usage in the short term, yet they impose fiscal burdens that many states cannot carry indefinitely.

Efforts to diversify supply chains, increase domestic fertiliser production or adopt more efficient agricultural practices require time and capital. They are not immediate solutions. Moreover the geopolitical conditions that produced the closure of the Strait of Hormuz may themselves inhibit coordinated international action. Trust deficits amongst major powers complicate collective responses to what is, in essence, a shared threat.

There is also a structural rigidity in modern agriculture that resists rapid adaptation. High-yield crop varieties are calibrated to specific input levels. Reducing fertiliser application without commensurate changes in seed technology or farming practices leads to disproportionate declines in output. The transition to more resilient systems, including regenerative agriculture or alternative fertilisation methods, is a generational project, not a crisis response.

An uncertain future

Although Iran has just announced its reopening at the time of writing, the consequences of that announcement are unclear. What is clear is that closure of the Strait of Hormuz is not merely a maritime or energy crisis. It is a catalyst for a chain reaction that extends from gas fields and fertiliser plants to wheat fields and urban markets. Its most dangerous consequences may unfold far from the Persian Gulf, in the kitchens and fields of the world’s poorest countries.

In an era of unprecedented technological capability, the re-emergence of large-scale hunger would represent a profound failure of the international system. Yet the mechanisms driving such an outcome are already visible. Energy shocks constrain fertiliser production; fertiliser shortages reduce agricultural yields; reduced yields drive up food prices; and elevated prices push vulnerable populations into poverty and starvation.

The lesson is stark. Globalisation has created efficiencies, but also dependencies. When a single chokepoint such as the Strait of Hormuz is closed, the repercussions are not contained within any one sector. They propagate across systems, revealing the fragility beneath apparent abundance. Unless addressed with urgency and coordination, this fragility may yet translate into one of the defining humanitarian crises of the decade.