I don't share Matthew Simmons's angst, but I admire his style. He is that rare doomsayer who puts his money where his doom is. After reading his prediction, quoted Sunday in the cover story of The New York Times Magazine, that oil prices will soar into the triple digits, I called to ask if he'd back his prophecy with cash. Without a second's hesitation, he agreed to bet me $5,000. . . .

I didn't try to argue with him about Saudi Arabia, because I know next to nothing about oil production there or anywhere else. I'm just following the advice of a mentor and friend, the economist Julian Simon: if you find anyone willing to bet that natural resource prices are going up, take him for all you can. . . .