Centuries before even the Divine Races
of Isekai would set foot upon the land, the gods found themselves divided by their tenets, choosing to fall in line with those others that shared their thoughts about the ways of the world. These groupings of gods would eventually designate things such as the domains of Clerics
and the oaths of Paladins
in future years, but originally the groupings were meant as nothing more than a way to discuss ideals.
The gods often fell into multiple groups, sharing the ideals of many, some ideals more strongly than others. They aligned in groups relating to War, Trickery, Order, Nature, Life, Knowledge, Death, and Arcane. Some gods rose to lead those discussions of their pantheons, while others fell by the wayside, nothing more than a footnote in the discussions of the mighty gods. These discussions would spawn religions and peoples that would populate the world of Isekai through the eons.
Each of the Pantheons of Isekai is composed of several divine beings, some of them are worshiped in more than one Pantheon but only one can be considered the pinnacle. Within every Pantheon, there will be a Pinnacle, three Primary, and several deities that merely exist within the Pantheon, and all are considered acceptable to worship based upon which one has importance to you or several if that suits your practices more. The Pantheons themselves do not dictate a religion but rather they act as a category and serve to be a lens through which you perceive a given divine being, the actual beliefs and convictions are solely dependent upon the divine being in question.