Every manager is familiar with the employee who just won’t change. Sometimes it’s easy to see why—the employee fears a shift in power, the need to learn new skills, the stress of having to join a new team. In other cases, such resistance is far more puzzling. An employee has the skills and smarts to make a change with ease, has shown a deep commitment to the company, genuinely supports the change—and yet, inexplicably, does nothing.

A version of this article appeared in the November 2001 issue of Harvard Business Review.