The figure that appeared on the screen in a Rome conference room on Tuesday was 4.28. That is the daily cost, in purchasing-power-parity dollars, of a healthy diet. For one in three people on the planet, it is a sum they cannot pay. The number, drawn from the annual State of Food Security and Nutrition in the World report, was presented at the headquarters of the Food and Agriculture Organization as the July heat settled over the city. It was not a projection or a target; it was a price tag, and it hung over the proceedings like a quiet indictment.

Máximo Torero, the FAO’s chief economist, moved through the data with the measured cadence of a man who has delivered difficult news before. Global hunger had declined for a third consecutive year, to 7.8 percent of the world’s population — roughly 645 million people. Asia, led by India’s combination of welfare programmes and rising farm productivity, had driven much of the improvement. Latin America and the Caribbean had also made steady gains. But the centre of gravity, Torero noted, had shifted. For the first time, Africa was home to the largest absolute number of hungry people: 309 million, against Asia’s 292 million. The proportion of Africans who could not afford a healthy diet stood at 66.6 percent, more than double the levels in Asia or Latin America.

Viewed from African capitals, the numbers describe a structural trap. The continent’s median age is about 19, far below Asia’s 33 or Europe’s 43, a demographic profile often called a dividend. Yet youth employment programmes across the region remain, in the words of a recent multi-country study, underfunded, weakly targeted and disconnected from real labour demand. Public spending on labour-market interventions averages 0.35 percent of GDP, against nearly one percent in developed economies. Meanwhile, the cost of a healthy diet is pushed upward by weak infrastructure, limited cold storage, fragmented regulations and non-tariff barriers that choke trade between neighbours. The result is a food system in which calories are often available but diversity — meat, dairy, fruit, vegetables — is priced beyond reach.

Torero and his colleagues were careful to frame the progress as fragile. The report’s projections, which foresee a 20 percent reduction in global undernourishment by 2030, do not yet account for the full shock of the Middle East conflict that has driven up energy and fertiliser costs, nor for the extreme weather that an El Niño event could bring in 2026 and 2027. In Sudan and the Democratic Republic of Congo, conflict has already severed millions from their land and income. The FAO’s David Laborde, speaking to AFP, described a world that had become “more unequal economically” even as growth returned, its fruits failing to reach the most vulnerable.

As the briefing ended, the screen in Rome still showed 4.28. Behind that number lay another, quieter figure: 150 million children under five with stunted growth, a condition that marks bodies and futures. And alongside it, a paradox: adult obesity had climbed from 12.1 percent in 2012 to 16.2 percent in 2024, a steep rise that Torero called “extremely urgent”. The report’s final image was not a graph but a geography — the Strait of Hormuz, a narrow waterway where shipping disruptions are quietly rewriting the arithmetic of survival, adding invisible surcharges to every sack of grain and every litre of milk that crosses the world’s most vulnerable tables.