No easy task -- you must win medals and promotions by accomplishing feats in your Civilization. Medals are awarded for being the fastest or the best at something, like discovering a brand-new technology or fielding the most troops in a crucial battle. Each of these produces a medal and a promotion up the ranks in your Civ. If you are promoted to Prince or Princess and earn one more medal, you will be promoted again -- to King or Queen! View the Civ World wiki pages on Medals and Ranks for more information.