Dan Charles

Nothing is more basic and simple than food. Yet it comes to us courtesy of a long, complicated supply chain that spans the globe.

That chain delivers food cheaply — but it can break. Four years ago, it blew up in most spectacular fashion, affecting hundreds of millions of people who rely on rice for sustenance. That crash — the great rice crisis of 2008 — was a true disaster for some of the poorest people in Asia and West Africa.