Golf has an ambivalent relationship with the environment. On one hand, it's a great preserver of open spaces. Golf doesn't pave the world - it helps to green the world. But the downside is, it uses a lot of fertilizer, pesticides and water. And this is in a world where we know that synthetic fertilizers and pesticides are toxic, and water is more and more scarce. Golf could do a lot more.

It has always been my view that terrorism is not spawned by the poverty of money; it is spawned by the poverty of dignity. Humiliation is the most underestimated force in international relations and in human relations. It is when people or nations are humiliated that they really lash out and engage in extreme violence.

Several technological and political forces have converged, and that has produced a global, Web-enabled playing field that allows for multiple forms of collaboration without regard to geography or distance - or soon, even language.

My mother-in-law says if you want to live like a Republican, vote like a Democrat. That if you are a part of the group that is doing well in this system, you owe it to yourself and to others to look out for them and make sure you are always building a ladder for others to join you.

I'm a capitalist. I believe in capitalism. But capitalism only works if you have safety nets to deal with people who are naturally left behind and brutalized by it.

The philosopher Ludwig Wittgenstein once remarked that if you ask a man how much is two plus two and he tells you five, that is a mistake. But if you ask a man how much is two plus two and he tells you ninety-seven, that is no longer a mistake. The man you are talking to is operating with a wholly different logic from your own.

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.