There are no deities in Eyros. No true deities. No one knows how the world came to be or why, and the only people who care are those who think there's some great power to be gained in the learning. But nobody knows.
There is no need for the setting to be pantheistic, dualistic, monotheistic, or anything of the sort. Spirits could have created the world, or mere concepts and elemental forces could have converged to form the world. There does not need to be a mind behind it all. It was agreed long ago that Eyros would be a setting without defined deities. Deities are not necessary for a campaign setting. Not everything has to be explained. Mysteries are good, and without mysteries there's nothing for DMs to put their imaginations into when they actually run a campaign.
This is why I don't run Forgotten Realms and such. Everyone and their cousin knows about everything, and I have absolutely no freedom to do anything as DM without people having fits. And as I said, deities are not necessary in a campaign setting. Look at Dark Sun!