The spike in food prices that followed the outbreak of war in Ukraine underscored the country’s central role in feeding the world. By disrupting Ukrainian exports of wheat, corn, barley and oilseeds, the Russian invasion stoked fears of a hunger crisis in the poorest countries and contributed to a spike in inflation in the developed world. A deal to unblock Ukraine’s Black Sea ports has raised hopes shipping could resume soon, though challenges include mine-riddled coastal waters.