The belief that the world is getting worse, that we can't solve extreme poverty and disease, isn't just mistaken. It is harmful.

The answer is simple, and harsh. The market did not reward saving the lives of these children, and governments did not subsidize it. So the children died because their mothers and their fathers had no power in the market and no voice in the system.

If you want to build a great company, get the hell out of Silicon Valley.

Well, no one gives aid to Zimbabwe through the Mugabe government.

With a public library card in your hand, you have access to the Internet and a world of opportunities.

I've always been interested in science - one of my favourite books is James Watson's 'Molecular Biology of the Gene.'

I don't think culture is something you can describe.