The price of food commodities - wheat, corn and rice - is unstable. It can suddenly shoot up. Food becomes unaffordable to millions of people around the world. It can also rapidly fall, putting farming families in jeopardy. Enough food is produced to feed everybody, yet hunger and the threat of famine still stalk the planet. The whole world would be better off if commodity prices were more stable. Focusing on hunger as an issue of price, this...