The correct answer is the peace of Westphalia
It was a series of treaties drafted and ratified between 1646 and 1648. It was decided that the peace treaties would be used to end numerous different wars in Europe which all belonged to the classification of the Thirty Years War. The peace established what sovereign states would mean and be and would create a legacy for others to adopt as well.
Think about geography reasons, or political reasons :)
They developed a collection of city states and as trade increased, cities situated near or on good harbours became large and powerful because they served as centres for trade. also to show the right of others
He took a boat to New York where he hope to find work as a printer.