I had a story/worldbuilding epiphany of sorts this morning whilst musing on the history of a particular city in my home game, and although it’s been said in the DW rulebook and the guide, sometimes you need to come to a realisation in your own words.
Any story I tell, or lore I reveal, as GM of this shared world, is simply that: a story. It’s something I heard about a place or person and maybe I didn’t hear it correctly, remember it right, tell it completely, or learn it from a reliable source. I am relying on the perspectives of each character to correct or augment my tales with stories, experiences or rumours they have heard. Imagine it like this: The GM tells a story about the history of the elves or dwarves, and another player chimes in to explain that although people might think that in some regions, their character knows another piece of the puzzle which clarifies things.
Together, we write the story and create a world with which we are all satisfied, and all ideas represented dramatically, if not harmoniously, to a greater whole.
Anyway, when that clicked in my head, I posted it to our campaign wiki to help the players see inside my noggin.