The silent tsunami (Economist article)

A wave of food-price inflation is moving through the world, leaving riots and shaken governments in its wake. For the first time in 30 years, food protests are erupting in many places at once. Bangladesh is in turmoil; even China is worried. Elsewhere, the food crisis of 2008 will test the assertion of Amartya Sen, an Indian economist, that famines do not happen in democracies.
Famine traditionally means mass starvation. The measures of today's crisis are misery and malnutrition. The middle classes in poor countries are giving up health care and cutting out meat so they can eat three meals a day. The middling poor, those on $2 a day, are pulling children from school and cutting back on vegetables so they can still afford rice. Those on $1 a day are cutting back on meat, vegetables and one or two meals, so they can afford one bowl. The desperate—those on 50 cents a day—face disaster.