With Europa Universalis IV the developers decided to enrich the well-known mechanics with new elements. One of the most significant innovations is a system called Monarch Power, which makes the personality of a ruler affect his ability to take specific actions (for example, the monarch of a warlike disposition will develop military technologies more quickly). Considerable changes were also made in the field of diplomacy and trade.
The game developers took care of a solid historical foundations. In EU IV there are 4,000 names of authentic state leaders and a whole cast of other characters known from history books. Some attention was paid to signifying major historical events, which often have impact on the game.
