The 21st century may well see a final showdown between scientific rationalists and religious fundamentalists. We'll see more and more conflicts — like Dawkins vs. creationists, or Bush vs. stem cells — as scientists discover more facts that challenge religious beliefs. But I've been racking my brains to think of science fiction stories that depict the conflict between science and religion in a compelling way. Why don't we see more stories that deal with this? And how can you (yes, you!) write about these conflicts in a smart, interesting way that doesn't resort to caricatures?