In today's world, the very definition of a leader is being transformed from some-one whose authority is derived from the position held to someone who has the human qualities required to build an agile organization, foster continuous inno- vation, and inspire outstanding performance. In this invaluable collection, well- respected leaders such as Daniel Coleman and Lieutenant General William C. Pagonis explore what it takes to be a leader in this exciting--and ever-chang- ing-work world. Featuring an all-new roundtable discussion and a unique essay on followership, Harvard Business Review on Breakthrough Leadership will help managers at all levels develop new insights into what it means to lead.