Generosity makes us happiest. We'll be happier people when we share, not when we impose, but when we learn from one another. Because when I'm connected to everyone I disappear... in being excellent you lose yourself. And when you're connected to everyone, that's the best thing that can happen.

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.

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.

By the end of the 1960s, the United States owned more than half of the Indian rupee money supply, and that had been acquired through food aid. So I think it's very interesting to see the very long history of how sovereignty and food go together. When some countries remove another country's ability to feed itself, it is a very powerful tool. Imperialist countries, like the United Kingdom, like the United States, have used it for centuries.

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.

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".

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