One of the most abused country on earth is Mexico. The marketing spills over the border, and people are persuaded to eat food that's bad for them, more in rich countries than in poor ones. I was traveling the world. What really struck me was the way we engage with food - how it's a global phenomenon - the world becoming more and more disconnected from it.

India has the largest number of hungry people. Yet it's an outcome of precisely the same mechanism. It's the control of agriculture that drives down the price it paid for food that it buys from farmers, who are the poorest people. Then you're paying very little for food. You're underpaying the poorest people in any society. Then they're marketing to us the things that are most profitable to them. And those are the things that are packaged and processed and what-have-you. That means you have the simple thing of the explosion of obesity and hunger as a result of capitalism in our food system.

Yet if you go to the supermarket and look at food that's produced through industrial agriculture, look at what's happened to the prices. Have they been going down? They've been going up and they will continue to go up. So the choice is either, do we hitch onto a system of agriculture that's doomed and will doom the planet with it, and go along the route of industrial agriculture, or do we want to shift to a kind of system that we know is going to be, in the long run, cheaper, because we'll have a planet left at the end of it? We need to factor that cost in.

I do think we have a food problem. In 2006, which is the year for which we have the latest data, 35.5 million Americans were food insecure. That means there are 35.5 million Americans who are so hard up at some point during the year that they didn't know where their next meal was coming from. That's a lot of Americans. They don't get reported very much because there's nothing spectacular about people skipping a meal because they're poor. The media tends to ignore that, just as it ignores the sort of chronic food shortages elsewhere in the world.

I think we do need to worry about a food shortage, but we also need to worry about the quality of the food. A lot of the stuff that's marketed to us tastes delicious because it fools our bodies. It fools our bodies into thinking that a particular mix of fat and salt and sugar is good for us. In fact, it isn't. That's why you're seeing in the United States life expectancies are declining, particularly in rural areas. You're seeing life expectancies falling in part because of diet.

Food sovereignty... is most of all characterized by it’s conversations around how to end hunger and poverty.

The food shortages and high prices have certainly sparked the world media's attention, particularly since they're coming in such diverse places, being everywhere from Haiti, to Senegal, to Bangladesh, to Egypt - a range of countries. That sort of caught the media off guard, and serves the media's prurient interests insofar as "it bleeds, and so it leads".