That's a central part of philosophy, of ethics. What do I owe to strangers? What do I owe to my family? What is it to live a good life? Those are questions which we face as individuals.

Sometimes we know the best thing to do, but fail to do it. New year's resolutions are often like that. We make resolutions because we know it would be better for us to lose weight, or get fit, or spend more time with our children. The problem is that a resolution is generally easier to break than it is to keep.

When diamonds' role in fuelling violent conflict in Africa gained worldwide attention, the diamond industry established the Kimberley process in order to keep ""blood diamonds"" out of international trade.

I'm not overly alarmist about it, but I do think there are some worrying signs, like the growing accumulation of wealth by a very small proportion of the population, plus elections in the US are much more dominated by money than anywhere else calling itself a democracy.

I have to remember that winning an Oscar is an almost unbelievable goal and that it is an honour just to be nominated.

These women were taking over these former manufacturing warehouses in SoHo and figuring out a way to be fashionable and viable without money. It's hard to imagine a life like that in Manhattan now - there's something romantic about it.

The human species was not born into a market economy. Bees won't sell you honey if you offer them an electronic funds transfer. The human species imagined money into existence, and it exists - for us, not mice or wasps - because we go on believing in it.

I don't see I'll ever arrive at the point where I'll say, 'Lance old boy, you've arrived at success.' There's no question about it. Once you get to the point where you've arrived at a station called success, you get complacent and lethargic. Those goals you set keep changing. But it's not a ruthless sort of thing.