When it was announced in late 2000 that Jeff Immelt would be taking the helm of GE, some skeptics were quick to voice their reservations about the future of the company after Jack Welch. Not only were Welch's shoes particularly large ones to fill, but the economy was dallying with recession, China and India were taking their first giant steps into the global economy, and just four days into Immelt's tenure came the biggest game changer of all: 9/11.

The hand-wringing, it turned out, was all for nought. During Immelt's first seven years on the job, GE's revenues increased by more...