The article discusses different leadership styles. James Clawson, professor of business administration at the University of Virginia's Darden School of Business, says smart leaders adapt their styles depending on the people they're dealing with, or the seriousness of the circumstances. Jim Collins, who examined strong leaders in his best seller "Good to Great: Why Some Companies Make the Leapâ€¦and Others Don't," says that the great executives were not necessarily aggressive, but they were rigorous.