When I used to theorize about a nuclear standoff, I didn't really have to understand what was happening inside the Soviet Union. It is a lot harder now to build a theory that can encompass all the complications of today's conflicts.

Nobody is going to give away the farm in Kyoto. It is not anybody's to give away. And even if the United States Senate would actually ratify a bad treaty, anything called for under the treaty would require legislation passed through both houses.

When I used to theorize about a nuclear standoff, I didn't really have to understand what was happening inside the Soviet Union. It is a lot harder now to build a theory that can encompass all the complications of today's conflicts.

I do think it's often a mistake to call them climate skeptics. I think they're deniers, just as I think president Ahmadinejad of iran who claims not to believe that the Holocaust occurred.

I sometimes wish we could have, over the next five or ten years, a lot of horrid things happening-you know, like tornadoes in the Midwest and so forth-that would get people very concerned about climate change.

I use game theory to help myself understand conflict situations and opportunities.

There is a tendency in our planning to confuse the unfamiliar with the improbable.