Space Age Stasis: Society is partially stagnant due to the religious proscriptions against thinking machines, robotics, and computers set up after the Butlerian Jihad, which keeps things from advancing too much. Spice does this as well, since its properties allow for expanded lifetimes and space folding, so there was no desire to experiment and find alternatives. Finally, the Bene Gesserit and Guild collaborated to set up a feudalistic government with full knowledge that it would be easier to control.

Paul's father, the Duke Leto, never marries the Lady Jessica as it provides some leverage with other Houses, who might want to arrange a marriage. He claims this as one of his few regrets. Fantastic Honorifics: "na-" is used as a prefix to a rank (for example, na-Baron) to refer to the heir to that rank. It's short for "nascent." Paul used his training as a Reverend Mother, with encouragement from the gholas of Chani and Jessica, to self-heal his body, and willed his organs to re-accept the life fluids that had leaked out of them. As Paul came out of his near-death experience, he announced that the final ghola of Duncan Idaho, a human with no specialized breeding, was the universe's Ultimate Kwisatz Haderach. Immediately, the Oracle of Time appeared in Cathedral, and announced that Paul was correct, that Duncan was indeed the super-being. She also announced that her watching over the Guild Navigators had come to an end, and that she would be leaving the universe—and taking all vestiges of Omnius with her. Despite Omnius' protests, before all assembled, the Oracle disappeared to another dimension removing all aspects of the Machine Tyrant with her. Paul becomes the Kwisatz Haderach, a term the Bene Gesserit describe as meaning "Shortening of the Way". This is in fact derived from the Hebrew "k'fitzat haderech", which translates literally to "shortcut". He is also the Mahdi for the Fremen, which is the same word Muslims give their awaited messiah. Bedouin Rescue Service: Jessica and Paul Atreides are rescued by Fremen. They then have to jump through religious hoops and trial by personal combat to prove that they're worth saving. Of course, they were deliberately seeking out the Fremen, and the Fremen were primed by the religious mythos seeded by the Missionaria Protectiva to look for a Messiah, which Paul and Jessica were trained to exploit. Otherwise they'd have been killed out of hand. Additionally, many Fremen tribes were warned by their leader, Liet, to watch for Jessica and Paul. The novel lays this out clearly through a scene where Liet-Kynes helps them hide from the Harkonnens.Viewers Are Geniuses: The universe features wheels-within-wheels plots and dense mythology, although the poetic descriptions can make the book enjoyable even to those who fail to understand it. Culture Chop Suey: A classic example. Millennia of galactic colonization have created completely new unrecognizable ethnicities and modified versions of current Earth religions. Encyclopedia Exposita: Every chapter of the first book is headed by a quote from Princess Irulan's studies of Paul-Muad'Dib. Every chapter of every subsequent book is headed by similar in-universe historic quotes. All of Frank Herbert's Dune novels make use of this, quoting from fictional (auto)biographies, treatises on religion/politics, journals... Sandworms of Dune is the second part of the planned seventh book of Frank Herbert's Dune series, along with Hunters of Dune. It is written by Brian Herbert and Kevin J. Anderson, who say that Sandworms is based on notes left behind by Frank Herbert. Sandworms is the second book of the Sequels of Dune. Lastly, the prescience essence of the Oracle of Time/ Norma Cenva, using her tens of thousands of years-old knowledge of the universe, believed that Kralizec was coming to human-kind. The Oracle had been searching for the Ithaca as well, for the entire 26 years that Duncan Idaho and crew, kept the no-ship hidden from the galaxies. The Oracle believed that when she could find the Ithaca, since she had seen through prescience that the Ultimate Kwisatz was aboard, that Kralizec would begin.

Only the Knowledgable May Pass: Lady Jessica is able to gain acceptance among the Fremen by using phrases planted in their culture by the Missionaria Protectiva (which manipulates religious beliefs to benefit the Bene Gesserit).Conlang: Many of the phrases and terms used throughout the book have some basis in real-world languages. The Fremen speak a clear development of Arabic. Galach, the official language of the Imperium, is described as an Anglo-Slavic hybrid with some other tongues mixed in for good measure — and it shows... in the rare instances when we get to read some actual untranslated phrases from it. Dune: House Secrets (2021), cooperative story-driven board game based on Detective: A Modern Crime Board Game Simultaneously, Murbella and the human fleet were equally astounded when the Machine ships just stopped functioning and drifted aimlessly over Chapterhouse, not realizing that the Oracle had given humanity a final gift of banishing Omnius permanently. Lastly, Janess and Murbella, as well as all of humanity's leaders found herself completely at a loss for words, when thousands of people instantly died all around them. The true humans suddenly realized that the dead individuals were Enhanced Face Dancers, and later found out that Erasmus had killed them through the tachyon net.