Some pantheon overlap would be interesting. Perhaps a god could be worship in two different pantheons or even by different species. A human and dwarven civilization might both worship a god of wealth, but the dwarves see him as being represented as a cave swallow, while the humans see him represented as a bull, etc. They might even attribute them with different spheres. The dwarven version might be associated with wealth and gems, and the human one with wealth and war, for instance. Depending on Civ religious tolerance and the similarities between the two deity versions, common worship might be a common ground bringing cooperation and trade between two civs, or might even be grounds for war. (humans send an army to put down the dwarven outpost that worships what they see as a 'corrupted' form of their god) I think diffusion of gods between cultures would be very interesting. The dwarven pantheon at world start might be very different then it might be after 200 years of world generation. perhaps some sort of [RELIG_TOLERANCE:ACCEPTABLE] sort of tag for how much civs resist or welcome worship of outside religions. Perhaps there could also be some sort of tag that determines if civs will send missionaries to convert other civs. Something like [SENDS_MISSIONARIES:2] for how aggressive they are during world gen, and perhaps something like [PROGRESS_TRIGGER_MISSIONARIES:3] to determine when they start showing up in fortress mode. (probably one or two with each caravan, possibly determined by the SEND_MISSIONARIES tag?) They'd wander around and try to change the religion of individual dwarves using the various conversation-oriented skills. you could throw them out/kill them, but that might cause a hit to your relations with their parent civ. Letting them do there thing might cause their civ to like you more, but could cause internal strife and possibly damage your relations with your parent civ, depending on what the RELIG_TOLERANCE tag is set to. Interactions with caravans, missionaries, etc could lead to humans/elves/(goblins?!?) wanting to establish a trading post/town/embassy in your fort (which you could build, designate and furnish, of course) I think making religion have more of an impact on dwarves in general is the key here. right now it barely does anything. We need proper pantheons, religious wars, missionaries, temples, heretics, etc to make it more interesting.