Part of that process is the continuing evolution of the world itself. Above all, a MUD is sustained by the characters who populate it. . . Each year, a society reenacts its myth of origin, hoping to move the world along a little, so that it will be a little more like the world of the myth. For instance, think of our annual reenactment of the Christmas Story. Each year when Christmas rolls around, we see all around us pictures of Mary and Joseph and the Baby.
Churches read the story and sing about it in carols.
For the month of December, we participate in a consensual hallucination, behaving as if the world were a certain way - as if all children are wonderful gifts, that we all love one another and express that love through giving gifts etc. You could say pretty much the same thing about the secular version of Christmas, with its Santa Claus's everywhere asking children what they want, and the decorating of Christmas trees. We string lights everywhere because we are afraid of the dark and the cold. So we create the world as we wish it were. We participate in a consensual hallucination, hoping to move the the evolution a little in the direction of universal love, peace and good will to all.