I had an idea for a setting where clerics tapped into certain universal principles (which happened to co-incide with the various domains - funny how that worked out) and studied them in order to gain magic power. This study was on a more intuitive level than the intellectual study of a wizard (hence, Wisdom-based - it's more about connecting with and "grokking" the domain than learning facts).
This setting would also have had religions (with non-manifesting deities like in Eberron), but they would not be directly connected to the cleric class. Certainly, a priest of Melora (I was using the Dawn War pantheon) might be a cleric of Nature, but they could also be a ranger, a druid, or for that matter a fighter or wizard with a penchant for the natural world.
The point of this was to make the clerical toolkit available without necessarily including religions and churches in the same context. For example, in pre-Spellplague Forgotten Realms one of the leaders of the Zhentarim was Fzoul Chembryl, cleric of Bane. That meant that the Zhentarim were strongly tied to the church of Bane and, to some extend, Bane's direct edicts. My setting would allow a cleric in a high position without forcing a religion-based link - their leader could be a cleric of Trickery, but that just gives them an appropriate toolkit.
This setting would also have had religions (with non-manifesting deities like in Eberron), but they would not be directly connected to the cleric class. Certainly, a priest of Melora (I was using the Dawn War pantheon) might be a cleric of Nature, but they could also be a ranger, a druid, or for that matter a fighter or wizard with a penchant for the natural world.
The point of this was to make the clerical toolkit available without necessarily including religions and churches in the same context. For example, in pre-Spellplague Forgotten Realms one of the leaders of the Zhentarim was Fzoul Chembryl, cleric of Bane. That meant that the Zhentarim were strongly tied to the church of Bane and, to some extend, Bane's direct edicts. My setting would allow a cleric in a high position without forcing a religion-based link - their leader could be a cleric of Trickery, but that just gives them an appropriate toolkit.