Let’s explore the motivations and decision-making prowess of Emperors, Kings and Queens. Some were known to be benevolent, some carried the moniker “Great” or other designation, and some were not at all revered. However, all are significant to the nations they conquered and ruled. We will look at Hirohito to Charlemagne, Genghis Khan to Catherine the Great, Marcus Aurelius to Julius Caesar and many more. More than fifty figures will be discussed, some familiar, some new, and all presented with accuracy from credible historical sources. So let’s learn what made them great!