I went for a walk tonight, trying to wrap my head around this place. A heavy religious presence, brought out of an oral tradition begets a priesthood dedicated to passing on those stories. The stilt village had one temple, which was big and ornate. Here in the "stone village" it seems like every building has a religious significance.
Randall's history reading implies that the stilt village came first - which makes sense, it is less advanced (or is that more primitive? tee hee). So we can postulate that maybe the "thou shall not go on land" was the original, and the land dwellers had to change things around a bit. I'm guessing from the density of Religious structures on the land that it was a decision of the church.
So.. we have a powerful priesthood who doesn't want to live on the water anymore, and changes the religion so they can build on land.
Eureka! Back to town to tell the others!
Oh shit, I think I'm lost.