In the long span of human history to the twentieth century, almost all great leaders of empires and states were men, with few exceptions. One of them was Heavenly Empress Wu Zetian. She is the only female ruler in history to have replaced a powerful dynasty with her own in a major country and crowned herself emperor of China. This book is about how this daughter of a concubine, who began life in the palace as a lowly concubine of Emperor Taizong (see Heavenly Khan) at a very young age, overcame all obstacles in a man-dominated world and rose to the summit of power in medieval China.