All events in human history obey a unique law, from our most intimate ideas and dreams, to the rise and fall of civilizations, including economic expansions and troughs, wars and conflicts, artistic creations and technical innovations. Indeed, all of our ideas, actions and relationships are ultimately determined by a supreme desire: to be the Hero of History. The discovery of the law opens a new era for research in human science. It also makes possible to predict the future of human societies and to reconstruct their past. This book reviews the elementary corollaries of the law, as well as the key scientific conjectures and breakthroughs which have prepared the discovery of the law.