Most Religions benefits appear to apply to all followers.
Example:
Guruship: +2 Production if city has a Specialist
My question is, do these only benefit the founding civilization, or all cities with a majority rule (icon shown in city status bar)? If it benefits everyone, including your opponents, what is the benefits of spreading a religion?
Best Answer
It depends whether it's a founder belief or a follower belief. If it's a founder belief, only the founder civilization gets the benefit. If it's a follower belief, every city in which there's a majority for that religion gets the benefit.
You can see whether a belief is a founder or follower belief when you select them, and also in the religion overview panel.
In your example, Guruship is a follower belief, so it applies to all cities with majority rule of that religion, regardless if they belong to the religion's founder or not. That mean that it doesn't actually benefit the founder in any way, if its not their city.
So what is the benefit of spreading a religion?