What follows is a guest post by James Harold, Professor of Philosophy at Mount Holyoke College. Parts of this blog post draw from his article “The Value of Fictional Worlds (or, Why The Lord of the Rings is Worth Reading).” Critics and fans approach certain works (like The Lord of the Rings or Star Wars) very differently. The critics evaluate these works on their own merits, considered as art objects in their own right, while fans consider in terms of their contribution to a larger world of play and creative exploration. While philosophers, like art critics, have spent a lot of time thinking about artworks, they have spent relatively little time thinking about this playful, participatory world, the world that is the focus of fan culture.