This conversation keeps coming up, over and over, in various online fora, and it’s about time to set the record straight on just how canon works, who gets to decide whether something is canon, and whether what you personally think should be canon, or whether what you do in your own game has anything to do with the question.
First, the actual definition. There are many, but this is the one which I think is most relevant to the discussion:
a : an authoritative list of books accepted as Holy Scripture
b : the authentic works of a writer
the Chaucer canon
c : a sanctioned or accepted group or body of related works
the canon of great literature
Religious overtones aside, it is definition a, “an authoritative list of books” which concerns Greyhawk. That is, it is the list of books, modules, boxed sets, etc. which are deemed to be authoritative for the World of Greyhawk Fantasy Setting. In order for a list of books to be authoritative, however, we must look to what person or body has the authority to declare something authoritative. In modern society, that is the individual or corporation which owns the Intellectual Property (IP) in question. And that, my dear readers, is Wizards of the Coast.
It should be pointed out that the same general theory applies to a variety of other well-known IP. For example, Star Wars is owned by Disney, which gets to decide what is and is not canon. Notably, that changed dramatically when Lucasfilm sold Star Wars to Disney, and the entire Extended Universe was suddenly declared to no longer be canon. Disney could do that, because they were the authority who could create the “authoritative list” of works that made up the Star Wars canon.
In exactly the same way, Wizards of the Coast gets to decide what is and is not canon for its various settings, including the World of Greyhawk, because they own the IP.
Let’s run through some of the implications of this.
First and foremost, it means that “Greyhawk canon” is completely divorced from what you or I or any individual DM does with our own home campaigns. If you want to have a World of Greyhawk that is on the same planet as Mystara, or one in which the Greyhawk Wars didn’t (or won’t) happen in CY 585, or one in which there’s an enormous forest where the Bandit Kingdoms should be that’s home to a mysterious elven empire, more power to you. But what you do at your table has no impact on “Greyhawk canon.” At best, you could call it “my Greyhawk canon” (aka “head canon”), but it’s yours and yours alone, and the fact that it exists has nothing to do with the real, actual, “Greyhawk canon.”
So please, when the question of whether something is canon comes up, stop saying “Well, in MY game…” because it’s entirely irrelevant. Ahem.
It also means that not everything that is published by the owner of the IP, or even with their authorization, is necessarily canon. Recall the example of Disney and the Star Wars Expanded Universe. Comic books do this all the time, with Marvel at one time even having a book titled “What if?” which explored a bunch of neat scenarios like “What if Doctor Doom became a hero?” None of them were canon, obviously, but they were still published by Marvel. But they could, if they chose, change that, and declare that “What if Daredevil became an agent of S.H.I.E.L.D.?” really was canon. They own the IP, they can do with it what they want in terms of making it canon or making it not-canon.
Another implication is that the original creator of the IP does not always define canon. This stems from the fact that the ownership of IP can change hands, and the original creator(s) can transfer their ownership (and thus the power to decide canon) to someone else, or some corporation. Again, this happened with Lucasfilm and Disney, and Gene Roddenberry and Star Trek, but it also happened with Gygax and Greyhawk. When Gygax left TSR in 1985, he transferred ownership of The World of Greyhawk Fantasy Setting to TSR, which later passed to Wizards of the Coast. That means that from that moment on, nothing he wrote in the setting was canon. This includes most specifically the Gord the Rogue books that were published by New Infinities (but not the first two Greyhawk Adventures books, which were published by TSR). Like it or not, “Greyhawk Ruins” is the canonical version of the dungeon, not Gary’s original, not the one he and Rob Kuntz did together, not Castle Zagyg, and not Castle of the Mad Archmage.
Now, this brings us into less well-charted territory. Let’s start with the RPGA and Living Greyhawk.
The various Living Greyhawk modules are easy to sort out. They’re not canon, period. This is true because Wizards of the Coast doesn’t own them. So, barring some grand gesture on their part unilaterally declaring them to be canon, they’re not. And that would be exceedingly dumb on their part, not only because the quality was (to put it charitably) uneven, but they are largely unavailable today, so it would make it impossible for anyone, even Wizards of the Coast, to truly say if a given character or magic item or something was part of Greyhawk Canon.
But what about the stuff they did publish themselves, and to which they still have the rights? Like the Living Greyhawk Gazetteer, the Living Greyhawk Journal articles that were included in Dragon magazine, and the online Living Greyhawk documents that remain on their website to this day?
Let’s go further. What about the “joke” module Castle Greyhawk? Or the inexplicably eccentric Fate of Istus? Or the officially authorized third-party graphic novel Vecna: Hand of the Revenant? Which of the three published versions of the Against the Giants series of modules is the official one? What about modules that are universally despised, like Puppets?
Truth is, we don’t know.
To my knowledge, Wizards of the Coast has never, even casually, made any official proclamation about the canonicity of anything. Without some sort of authoritative list from the owner of the IP, it really is impossible to state with 100% certainty what is and what is not “Greyhawk Canon.” Maybe someday they’ll come out with such a list, and these interminable discussions online can end, so we can make room for other interminable discussions.