It defines a number of modifications: to morale, economic factors and state agents produced. State religion affects many aspects of the game. This takes you to the country screen an icon depicting its state religion is on the upper right. To see the state religion for a country, click on its coat-of-arms on its capital. In the EU2 timeframe, the idea of religious tolerance was being invented, and the related idea of state religious neutrality was almost nonexistent.
The state religion in EU2 is the official religion of the ruling class of a country.
