The great modern fantasies were written out of religious, philosophical and psychological landscapes. They were sermons. They were metaphors. They were rhetoric. They were books, which means that the one thing they actually weren’t was countries with people in them. The commercial fantasy that has replaced them is often based on a mistaken attempt to literalise someone else’s metaphor […] the moment you begin to ask (or rather to answer) questions like, “Yes, but what did Sauron look like?”; or, “Just how might an Orc regiment organise itself?”; the moment you concern yourself with the economic geography of pseudo-feudal societies, with the real way to use swords, with the politics of courts, you have diluted the poetic power of Tolkien’s images. You have brought them under control. You have tamed, colonised and put your own cultural mark on them.