It takes a good crisis to get us going. When we feel fear and we fear loss we are capable of quite extraordinary things.

The four words that will define this century: The Earth is full.

Thanks to those pesky laws of physics, when things aren't sustainable, they stop.

If you want to change the world, change it through the market

We can choose this moment of crisis to ask and answer the big questions of society's evolution — like, what do we want to be when we grow up?

The Earth doesn't care what we need; Mother Nature doesn't negotiate.

It takes a good crisis to get us going. When we feel fear and we fear loss we are capable of quite extraordinary things.