Can world manage hunger crisis? Add food costs to the challenges.

Donors have responded generously to boost global resilience to food shortages, but today’s numbers are daunting: more hungry people in more countries. The war in Sudan is just the latest surprise.

In the weeks since fighting erupted in Sudan, ever larger groups of women and children have been fleeing across the border into Chad, seeking food and safety.

Chadians and international relief organizations already on-site to address Chad’s own food shortfalls have been doing what they can to feed and shelter the refugees – even if that means only a...