Peter Koestenbaum, the preeminent business philosopher, has been a trusted mentor to business leaders worldwide. In this thoroughly revised edition of his classic book he shares his wisdom about the fundamental nature of leadership and shows what it takes to become an exceptional and passionate leader in today's complex world. At the very heart of the book is his Leadership Diamond model a paradigm that challenges managers to transform their thinking and approach everything with fresh effectiveness in order to reap richer results and become great leaders.