What are the reasons for the Northern War?

The Northern War is called the European conflict, which continued from 1700 to 1721 between the Swedish kingdom and the Northern Union, which included Saxony, the Danish kingdom and the Russian kingdom. The reason for the start of the war was the adoption of the throne of the Sweden of the young and inexperienced King of Charles of the Twelfth. These wanted to take advantage of the neighbors who were previously imposed by the Swedish “Rules of the game”. Denmark wanted to resume control over the Baltic Sea, Saxony – to join the Livonia, and the Russian power to get a way out to Baltic and return ingrius with Karelia.