New Delhi, May 5 -- As the economic consequences of US President Donald Trump's war against Iran become evident, policymakers around the world are running out of patience. The recent Spring Meetings of the International Monetary Fund and World Bank in Washington made this abundantly clear, with UK Chancellor of the Exchequer Rachel Reeves lamenting the "folly" of a war that is "not ours."

But much of the cost will be borne by the US itself. The immediate effects are visible: a sharp rise in gas prices, inflation climbing to a two-year high and growing concerns that, as consumers cut back on spending to offset higher costs, unemployment will rise.

While these short-term shocks are serious, a major risk that has received less attention is...