[Greyhawk] The Aerdian Church of Law

Nomism (not to be confused with Gnomism!) is the umbrella term for the doctrinally diverse and often competing churches of Law in the Flanaess. These traditions all hold the belief that cosmic order derived from the divine force of Law must be maintained and supported against destructive Chaos which threatens all existence.

Nomism in the Eastern Flanaess developed from Oeridian polytheism and philosophical ideas borrowed from the Bakluni and Suel. The various traditions hold in common that Law is divine and transcendent and has transmitted through holy writ a body of rules for orderly society and virtuous living. Faithful adherents are promised an afterlife in a Lawful Plane. The traditions often differ in regard to cosmogony, the status of gods, ordination of priests, and interpretation of scripture. 

The primary canonical text of the churches of the Eastern Flanaess is the Book of The Eternal Law, which is a liturgical manual, code of clerical behavior, and collection of aphorisms. Also important are the Twelve Tablets of the Law of the Aerdi which lay out the foundations and principles of Aerdian society and jurisprudence. Various commentaries on both the Twelve Tablets and Aerdian common law are also considered canonical.

The hymns and verses of the Book of The Eternal Law reveal a cosmology wherein certain gods of the Oerid tradition are viewed as "Lawful" and so worthy of veneration as "of the substance and essence" of Law. Chief among these is Pholtus, the Oeridian polytheistic god of heavenly light, though many others are considered important.

Other old gods are deemed "Chaotic" and deprecated if not outright suppressed as "antinomian" and thus, anathema. The faith also recognizes hosts of "rebel angels," beings of "the substance of Law" who broke their oaths of fealty and now work to establish their own, flawed order in the universe. These are the Devils.

Nomism views no law as entirely secular, though it does differentiate between immutable, divine principles and customary law. Nomist priests act as advisors for temporal rulers and higher-level clerics serve an appellate function for decisions of local temporal powers. The Aerdian Church which co-developed with the Great Kingdom of Aerdy, has a supreme Hierarch who is elevated above the others in their role as "Holy Censor," the highest religious authority and (theoretically) final arbiter of legal disagreements within the churches sphere.

Commentary: This is admittedly a fair bit of additional material when compared with the sparseness on this topic in the Folio and is fairly divergent in some details. Canonical Greyhawk is polytheistic (or henotheistic) with religious institutions that gesture toward historical, monotheistic models. I chose to adapt the polytheism to something more like the implied D&D setting monotheism, and got a religion that has elements of, well, a lot of real-world belief systems but in a way a think seems plausible and playable.