Michael Useem believes that leadership, at its essence, is the act of making a difference, especially when the stakes are high - be they personal, professional, or organizational. By examining what others have done when a company, a life, or even the fate of a nation was on the line, Useem shows us what works and what fails, what hastens a cause or subverts a purpose, and what must be done when we have to decide and perform under great duress.