In any society, only very few human beings can become leaders; yet without effective leaders, a society cannot long remain viable. How can we understand leadership from a psychological point of view? Who becomes leaders and who does not? Why do they become leaders, and what does it mean for a leader to be effective? This book provides a psychological study of leadership, offering a better understanding of the problems that surround the development of leadership and insights into how best to nurture and sustain it effectively. It uses as examples leaders ranging from Einstein to Thatcher.