This is chaosvii’s default setting upon which games are built upon.

Primary Central Facts
Evening Glory was the first being in existence; Nerull was the second; they were made from seemingly nothing and manifested on the Material Plane.

Seconday Central Facts
Divine Power originates from the Material Plane, the Positive & Negative Planes, the Ethereal & Shadow Planes; Divine Power flows from these coterminous Planes to all other planes; it is extremely difficult to make Divine Power flow back to the Material Plane; Deities that gain too much Divine Power are repelled by the Material Plane.
Divine Power comes in multiple forms: Orderly, Ethically Neutral, Chaotic, Unholy, Morally Neutral, Holy.
Orderly Divine Power is very strongly antagonistic towards Chaotic Divine Power and vice-versa.
Unholy Divine Power is fairly antagonistic towards Holy Divine Power and vice-versa.
Ethical Neutrality is Divine Power that is either fairly balanced between the forces of Order & Chaos or antagonistic towards either extreme.
Moral Neutrality is Divine Power that is either fairly balanced between the forces of Holy & Unholy or antagonistic towards either extreme.
XP is a meta-game quantitative approach to “Divine Power”

Tertiary Central Facts
Divine Magic is a raw form of Magic that is governed by belief, and shaped by will.
Arcane Magic is a refined form of Magic that is governed by understanding, and shaped by will.
Divine Magic & Arcane Magic need not be antagonistic towards each other, but often are because of the spellcasters that wield them have traditionally been antagonistic towards each other.

This setting has strong themes of Anti-religion, Agnosticism, Humanism and Shintoism, and they will prevail in most games.

Take a look at the wiki. There is some more helpful info there.

Evening Glory & Nerull