IMC I tend to view moral order as subjective in the eyes of the individual, BUT powerful entities -- gods -- can still try to impose or inspire their own ethos on the multiverse.
Again, IMC the gods and the primordials are bound up in a multiversal order that is generally hidden to mortals until they reach the Epic Destiny time, or for certain characters during their Paragon times. It is entirely based on old BECMI/Mystra information I gleaned from the Vault of Pandius (official Mystra archive/fansite).
The campaign world is Norse themed, with only a few gods surviving 'Ragnarokk' -- a battle between the gods of creation vs. the god of entropy (Tharizdun). The surviving gods are Erathis, Sehanine, the Raven Queen, an imprisoned Tharzidun, Lolth, The Traveler/The Mockery (combined Eberron god -- essentially Loki), and Mephistopheles and his Infernal Remnant.
The Five Spheres of Power – ancient and abstract proemial forces whose interaction created the current state of the multiverse and the Seven Worlds. Gods and exarches of wildly different character and moral outlook can serve the same sphere, and within each sphere different outlooks and philosophies abound. The state of multiversal balance in the Third Age is precarious at best. A level of balance currently exists thanks only to the sacrifice of most of the Aesir within the heart of the Abyss to counter Tharizdun from annihilating the multiverse and for the finality of Entropy. In the wake of their sacrifice, the sphere of Matter is resolutely maintained by the quintessence of their vestigial power. The last true Aesir – Erathis, Sehanine, and the Raven Queen became the highest embodiments of Thought, Energy, and Time, respectively.
Energy – the balance through disorder (Sehanine (U), The Traveler (E); some elementals, some giants, some norns (eladrin archfey), and some titans).
Exemplar Epic Destinies: avatar of freedom [DP], avatar of storm [DP], chosen [DP], demigod [Phb], exalted angel [DP], immanence [AP], saint [DP].
Entropy – the end of balance through annihilation (Tharizdun (CE), Lolth (CE); some elementals, some giants, nagas, slaadi, undead, and some titans).
Exemplar Epic Destinies: archlich [AP], demigod [Phb], chosen [DP], harbinger of doom [Phb2], saint [DP].
Matter – the balance through immutability (The Fallen Aesir, Jormugand, the World Dragon (U), and some norns (eladrin archfey)).
Exemplar Epic Destinies: chosen [DP], demigod [Phb], exalted angel [DP], fatespinner [Phb2], any specifically primal epic destiny [Varies], saint [DP].
Thought – the balance through reason (Erathis (G), Mephistopheles and the Fallen Vanir (E); devils, and some norns).
Exemplar Epic Destinies: archmage [Phb], archspell [AP], avatar of hope [DP], avatar of justice [DP], avatar of war [DP], chosen [DP], demigod [Phb], exalted angel [DP], feyliege [AP], lorekeeper [Phb2], parable [AP], revered one [Phb2], saint [DP].
Time – the balance through cycle (The Raven Queen (U); inevitables, sorrowsworn and some norns (eladrin archfey)).
Exemplar Epic Destinies: avatar of death [DP], avatar of life [DP], chosen [DP], demigod [Phb], exalted angel [DP], lord of fate [AP], sage of the ages [AP], saint [DP].