Over the past 100 years of wars, one incentive for peace has been a shared interest in preventing or ending famines – by opening humanitarian corridors. Adversaries would pause hostilities to allow food-related products to reach blameless, hungry civilians. Such a moment of goodwill sometimes opened a diplomatic window for a war to end. A similar tenderness toward the innocent is now being expressed during the Iran war. A number of countries including Italy, as well as the United Nations, are probing a diplomatic deal in which Iran would allow ships to sail through the Strait of Hormuz carrying raw materials for agricultural fertilizer made in Gulf Arab countries. Until the current war with Iran started Feb. 28, about a third of the world’s supplies of petroleum-based synthetic fertilizer products passed through the maritime choke point. With Iran’s near-total closure of the strait, that flow has fallen about 90%.…