I had an interesting conversation with my wife recently after watching a particular episode of "Babylon 5", where Commander Ivanova sits Shiva in memory of her father. To the best of our knowledge, this is nearly the only time in any futuristic Sci-fi where any human character follows any kind of religion that's directly recognizable from our current human practice. The later "Dune" novels also feature a band of travelling Jews, and just like Ivanova, their form of Judaism is entirely recognizable based on modern 21st Century practice. In other Sci-fi shows and books, I can't think of a single human character who follows a truly recognizable religion, as opposed to a fictionalized rearrangement or something entirely made-up from whole cloth. Dune's Fremen follow a "Buddislamic" or "Zensunni" religion Other Dune characters honor the Orange Catholic Bible Babylon 5's Doctor Franklin is a "Foundationist", which is a religion made up for the show. Honor Harrington follows a combination of "Second Reformation Catholicism" (another fictionalized rearrangement) and "Graysonism" (entirely made-up) But the vast majority of human sci-fi characters follow no religion whatsoever, sometimes being even openly hostile to religion (I'm thinking specifically of Captain Picard in "Who Watches the Watchers" -- but in that case he was openly opposed to the formation of a religion based on him personally.) I'm curious why that pattern tends to emerge in future-fiction, and why Judaism out of all possibilities is the only one that survives in a pure (meaning, 21st-century modern) form?