Here's an interesting essay advancing the thesis that the Christian imagination lends itself to fantasy (i.e., Tolkien & Lewis) and the Jewish imaginaiton to Science Fiction (i.e., Asimov & Silverberg):

C. S. Lewis was always clear that he did not set out to write The Lion, The Witch, and the Wardrobe as a didactic project. It began, he said, with an image in his head of an umbrella-toting faun standing in the snow. Nonetheless, when he wrote the Narnia books, Lewis drew deeply from his Christian beliefs. In this, he and the many Christian fantasy writers have an advantage over not only the few, largely assimilated Jewish fantasy writers, but even over a deeply knowledgeable and religiously committed Jewish writer who might seek to create a work of fantasy dramatizing Judaism in the way that the various Narnia books dramatize Christianity. The Jewish difficulty with fantasy is not only historical and sociological. It is theological as well, and this has to do with the degree to which Judaism has banished the magical and mythological elements necessary for fantasy.

To put it crudely, if Christianity is a fantasy religion, then Judaism is a science fiction religion. If the former is individualistic, magical, and salvationist, the latter is collective, technical, and this-worldly. Judaism’s divine drama is connected with a specific people in a specific place within a specific history. Its halakhic core is not, I think, convincingly represented in fantasy allegory. In its rabbinic elaboration, even the messianic idea is shorn of its mythic and apocalyptic potential. Whereas fantasy grows naturally out of Christian soil, Judaism’s more adamant separation from myth and magic render classic elements of the fantasy genre undeveloped or suspect in the Jewish imaginative tradition. Let us take two central examples: the magical world and the idea of evil.

Christianity has a much more vivid memory and even appreciation of the pagan worlds which preceded it than does Judaism. Neither Canaanite nor Egyptian civilizations exercise much fascination for the Jewish imagination, and certainly not as a place of enchantment or escape. In contrast, the Christian imagination found in Lewis and Tolkien often moves, like Beowulf or Sir Gawain, through an older pagan world in which spirits of place and mythical beings are still potent. Nor is this limited to fauns and elves. This anterior world can be dark and frighteningly alien, as Tolkien has Gandalf indicate in The Two Towers. “Far, far below the deepest delvings of the Dwarves,” the wizard says, “the world is gnawed by nameless things. Even Sauron knows them not.” Lewis sounds the same note in Perelandra when, far below the surface of the planet Venus, his protagonist catches an unsettling glimpse of alien creatures, and wonders if there might be “some way to renew the old Pagan practice of propitiating the local gods of unknown places in such fashion that it was no offence to God Himself but only a prudent and courteous apology for trespass.”

Here's the whole thing.

Via First Thoughts.