[quote=@Ophidian]
<Snipped quote by Brithwyr>

I'm extremely leery, as go-GM of allowing a player that kind of influence over, presumably, other PC and NPC nations. It seems quite abusable, regardless of the exact method, to be honest.
[/quote]

There will be a college of cardinals. Every nation is allowed to put forward a Cardinal who will uphold their ideas as a nation. There will be a vote, based on how individual piety, reputation of the national and a little bit of random chance.