The hidden hand of the market will never work without a hidden fist.

So what am I? I guess I would call myself a sober optimist...If you are not sober about the scale of the challenge, then you are not paying attention. But if you are not an optimist, you have no chance of generating the kind of mass movement needed to achieve the needed scale.

Syria is on the back end of basically a decade-long drought. Over the last decade, farmers and herders have been ravaged in Syria forcing them to give up and move to urban areas. This has put a huge strain on urban resources, and it's surely one of the reasons for the uprising there.

I love America. I think it's the best country in the world. But I also think we're not tending to our sauce.

Hope and optimism aren't just attitudes, they are life strategies.

What if we're wrong and there is no climate change? Well, by doing everything possible to address it, we will still use less water, stimulate new energy savings and, in time, money-saving technologies, enjoy cleaner air, and preserve more forests and trees and animals.

Never before in the history of the planet have so many people, on their own, had the ability to find so much information about so many things and about so many other people.