In Victoria 3, Pops may change their nationalities and religion, based on the global political changes. How that happens, was revealed in the latest dev diary.
There are a couple of options when it comes to Pops changing their nationalities, or religions, based which are tied to discrimination in Victoria 3:
- Ethnostate: only Pops of primary cultures are accepted
- National Supremacy: Pops whose cultures share both heritage and another trait are accepted
- Racial Segregation: Pops of the same heritage are accepted
- Cultural Exclusion: Pops whose cultures share any similarities are accepted
- Multiculturalism: no cultures are discriminated against
- State Religion: only Pops who adhere to the state religion are accepted
- Freedom of Conscience: Pops who adhere to a religion in the same family as the state religion are accepted
- Total Separation: no religions are discriminated against
The practical impact of these laws, therefore, depends on what the state religion and primary cultures of your country are, as well as who actually lives in your country. An Ethnostate operates no different in practice than a Multicultural state if only Pops of primary cultures live there.
Pops who are discriminated against on the basis of their religion will always be in the process of converting to an accepted religion. The religion they convert to is not necessarily the state religion, though - it could be any accepted religion that is dominant in the state where they live.
An Indigenous American following an Animist religion in the United States with Freedom of Conscience instead of Total Separation is eventually going to convert to some form of Christianity to avoid religious persecution, but if they live in a Nebraska that has been settled by predominantly Catholic rather than Protestant Pops, they would convert to Catholicism even though Protestantism is the dominant religion in the nation as a whole.