Matthew Simmons

Matthew Simmons, head and founder of the world's largest energy specialist investment bank, shot to prominence this year with his controversial work on the oil fields of Saudi Arabia, in which he asserts that the kingdom is no longer able to play the vital role of world's swing producer.

"When Iraq invaded Kuwait, Saudi Arabia was able to increase its oil production from five million barrels a day to 8 mb/d in just 90 days," says Simmons. "This reinforced the belief that Saudi Arabia would al