There is no degree of human suffering which in and of itself is going to bring about change. Only organisation can change things.

Redistribution of wealth would require enormous amounts of investment. The only time an elite has accepted this has been during crises, such as in America in the 1930s under Roosevelt.

Only around 2% of the earth's surface is cultivatable land.

Everything has to be done to build some sort of international democracy. We've seen only the tiniest beginnings of that.

How do we get democracy at the international level? That's our problem. and it's essentially the same problem people faced in the 18th Century when they tried to get democracy nationally. Now we need it internationally.

If we wait for the U.S. to do something, we will be waiting for a very long time. It's Europe, it's Australia, it's the other developed and middle developing countries that have got to do the job.

The question is not only what is grown but what it's used for. There's not going to be a mass transformation of dietary habits in rich countries-on the contrary, the first thing people do when they become more prosperous is to buy more meat.