"This sort of thinking may lead to a commitment to renew the strategy and may challenge the organization to recover its distinctiveness. Such a challenge can be galvanizing and can instill the confidence to make the needed tradeoffs."

Using history to galvanize and recover an organization's distinctiveness is a message I try to communicate all the time. Looking backward isn't a mere exercise; it's a vital component of the future. Besides teaching and writing, Porter chairs HBS's program for newly appointed CEOs of large corporations. I hope his executive students are listening to the history message.