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Literature: Ringworld
Louis Wu: It looks like a star with a ring around it. What is it?
Chiron: It is a star with a ring around it. A ring of solid matter. An artifact.

An epic science fiction series by Larry Niven set on the original Big Dumb Object.

Imagine a giant ring, a million miles wide, with a radius of one Earth orbit and a circumference of some 600 million miles, orbiting around a star. The Ring is far enough out that the heat is comfortable for humans to live on. It spins to mimic gravity, and has walls a thousand miles high to keep the air from spilling off its sides. Such a ring would have an inhabitable surface area equal to almost three million planets the size of the Earth.

It is big. It is huge. Much of the work dealing with the Ringworld is about the difficulties of such a large world. The issues include how it was made, who could have built it, the various societies developed on it over time, and the problem of running it.

Ties into Niven's Known Space series.

Unrelated to Discworld, though it was a major influence on Terry Pratchett's earlier book Strata.

Tropes encountered:

  • Absurdly Sharp Blade: The variable sword, a piece of monomolecular wire held taut by a stasis field.
    • Also the Shadow Square Wire. A heap of it looks like smoke from a distance. It will slice apart any matter that touches it: trying to pick it up will cut off your fingers, and one character even runs into a trap made from it and gets his head cut off (fortunately he has a spare).
  • After the End: The Ring once had a widespread civilizationnote , but it fell— literally.
  • Ancient Conspiracy: It's revealed in the first novel that the Puppeteers secretly interfered in the Man-Kzin wars to try and breed docile Kzinti and also secretly lobbied for the Birthright Lottery to breed someone like Teela Brown. In the second novel, we also learn that the Puppeteers secretly engineered the Ringworld's superconductor plague so that they could investigate the Ringworld safely.
    • The superconductor plague was a LOT worse than that. They engineered it so they could arrive in the nick of time and save everything, making a LOT of money and getting a LOT of power in the process. Then politics happened between sowing the plague and fixing it, and the fixing never happened.
  • Artificial Gravity: The Ringworld generates this using centrifugal force.
  • Artistic License - Geography: Louis Wu teleports from city to city on his 200th birthday, to stay ahead of midnight and stretch the day out... but the first printing of Ringworld has him accomplish that by travelling from west to east.
  • Author Appeal: Rishathra, which is cross-species mating used for the purposes of diplomacy on the Ring. Niven reportedly wore a shirt to conventions that says "I have sex outside my species"note 
  • Badass Boast: "It was I who, on a world which circles Beta Lyrae, kicked a kzin called Chuft-Captain in the belly with my hind hoof, breaking three struts of his endoskeletal structure." — Nessus, making a Continuity Nod to the Known Space short story "The Soft Weapon".
  • Big Dumb Object: The Ringworld itself is an ancient and mysterious super tech that dwarfs anything else in the galaxy. Though its population numbers in the trillions, the empty areas are so large that it feels practically abandoned.
    • The feeling is entirely justified. The human characters are used to planets with population densities a thousand times that of the Ringworld, and even the Kzinti character is used to population densities of his own species ten to a hundred times greater, and has spent the last few years on Human-occupied worlds.
    • A comment repeated is that the Ringworld isn't so big as to be incomprehensible - it's just barely small enough that the mind can understand how mind-bogglingly big it actually is.
  • Bizarre Alien Biology: One of the main themes of the book.
  • Bizarre Sexual Dimorphism: Kzinti females are non-sentient. Also, it's suggested at one point that puppeteer females must mate with two males in order to conceive.
    • In the second book, The Hindmost (who is mated to Nessus) explains Puppeteer reproduction in more detail. The 'female' Puppeteer is actually a different species, which acts as a host for the embryo formed by the gametes placed into it by the Puppeteers. The organs used to deposit gametes are described as being "most similar". Louis then understands why Nessus didn't want to talk about it: "This is ugly."
  • Blackmailed With A Body Upgrade: In the second book, the Hindmost recruits Chmeee (formerly Speaker-to-Animals) for the second expedition by offering him the technology to perform Longevity Treatments on kzinti. The twist is, the Hindmost demonstrated the treatment on Chmeee, who now no longer looks like himself and must have the technology in order to prove his identity to the kzinti government and keep his property and name.
  • Born Lucky: Teela Brown (to the extent of being a canon Black Hole Sue), later deconstructed to hell and back.
    • On the other hand, she might not have been born lucky after all, and just looked that way for the benefit of people who were. (Trying to follow cause and effect in a universe with people whose mere existence is supposed to cause the entire universe to automatically conspire in their favor is a serious Mind Screw.)
      • Louis Wu actually discusses this at one stage, making the obvious suggestion that it may simply not have worked at all. Later on, it turns into Be Careful What You Wish For as Teela morphs into a Protector, at which point it becomes obvious that what actually constitutes "luck" is so subjective as to be meaningless
  • Brown Note: The descriptions of the vast dimensions of the Ringworld have given people nausea from misplaced vertigo (1000 mile high mountains no thank you).
  • Captain Oblivious: Teela Brown.
  • Centrifugal Gravity: The Ringworld is designed to make use of it.
  • Chestburster: Louis suspects that puppeteers reproduce this way, although there is no definitive confirmation about whether he's right. (Fleet of Worlds only confirms that gestation is always fatal to the "mother"/host.)
  • Consummate Liar: Almost all of the information that Halrloprillalar provided in Ringworld turned out to be untrue thanks to retconning.
  • Converging Stream Weapon: The upgraded Slaver Disintegrator.
  • Cool Ship: Anything that reaches the Ringworld from Known Space in a reasonable amount of time qualifies. Eventually the Ringworld itself qualifies as the largest starship ever.
  • Cowardly Sidekick: Nessus, through and through. It's a known trait of his people, to the point that puppeteer society considers him insane for willing to risk his life to starship travel.
    • Nessus isn't just considered insane. He is. He is bipolar, swinging back and forth between "normal" puppeteer cowardice, and periods of berserker-like bravery.
      • His insanity is in fact bred for in his species. The Hindmost isn't actually in the safest position of the tribe, but the one in the best position to strike enemies following them. Puppeteers can kick a heart out the back of the ribcage with little physical effort, assuming their mental effort is able.
  • Cry Cute: "[Teela] was one of those rare, lucky women whom crying does not make ugly."
  • Dangerous Phlebotinum Interaction: Known Space has the life-extension drug boosterspice. The inhabitants of the Ringworld have their own life-extension drug, but you can't take both: boosterspice is poisonous to someone who's used the Ringworld drug.
  • Dropped A Bridge On Her: Halrloprillalar.
  • Electric Instant Gratification: The tasp, which stimulates the pleasure center of the brain from a distance, and the droud, a surgically implanted device used by current addicts.
  • Famous, Famous, Fictional: Louis' opinion of Nessus' voice — "Had Louis visualized a woman to go with that voice, she would have been Cleopatra, Helen of Troy, Marilyn Monroe and Lorelei Huntz rolled into one."
  • Faster-Than-Light Travel: Though the Ringworld is so distant it still takes years to get there from Known Space.
  • Floating Continent: from buildings to cities.
  • Foreign Queasine: The City Builders are disgusted by Louis Wu's love of cheese.
  • Free-Love Future
  • Fully Absorbed Finale: Louis' storyline in Ringworld's Children is concluded in Fate of Worlds, the fifth and final installment of the Fleet of Worlds series co-written with Edward M. Lerner.
  • Gambit Pileup: The third and fourth books become this when dozens of protectors start plotting against each other.
  • Gargle Blaster: The Machine People ethanol is both fuel and drink.
  • God Guise: The strategy that the characters call the "God Gambit", where they pretend to be gods among Ringworld natives.
  • His Name Really Is Barkeep: Speaker-To-Animals is known by his profession (as are all Kzinti) until he has earned the right to choose his own name.
  • Hot Librarian: Harkabeeparolyn, if you're into rishathra.
  • Interspecies Romance: "Rishathra" is sex between different species used for diplomatic purposes or when meeting new tribes. It's also apparently a form of birth control for those species that get pregnant every time they mate amongst their own.
  • Longevity Treatment: There is an equivalent to boosterspice available on the title space construct.
  • Love Is in the Air: Vampires have super-pheromones that induce a very distracting mating frenzy in their victims. "Essence of Vamp" is a popular perfume among City Builders...
  • Luke, I Am Your Father: Wembleth.
  • Metal Poor Planet: As an artificial world, there are no mineral ores: if you dig into a mountain, you'll hit the scrith underlying the sculpted landscape after a few hundred meters.
  • Neglectful Precursors: The Pak built the Ringworld and seeded it with Pak breeders, Homo habilis. It's a pity the Pak are so bad at building societies.
  • Never Live It Down: In-Universe. Because Red Herders are culturally monogamous, much of the conflict in the "Fearless Vampire Slayers" storyline in The Ringworld Throne comes from Tegger and Warvia fearing that they'd get a reputation for promiscuity after all the rishathra they had while under the influence of vampire scent.
  • Off to See the Wizard: After finishing the first book, Larry Niven realized that its plot and characters mirrored those of The Wizard of Oz. (Louis Wu is Dorothy, Nessus is the Cowardly Lion, Speaker-To-Animals is the Scarecrow, Teela Brown is the Tin Man, and Halrloprillalar is the Wizard.)
  • Older than They Look: Louis Wu, Chmeee, and pretty much anyone else who has taken boosterspice or used Carlos Wu's nanotech autodoc.
  • Our Better Is Different: The Puppeteers value survival to the point of cowardice, so their leaders are "those who lead from behind" and the highest ranking one is called "The Hindmost".
    • This has a hidden subtlety. As herd animals, the Puppeteer don't charge enemies the way territorial hominids do; they run away. So the hindmost member of a puppeteer herd is actually the rear guard, the most exposed and combative of the bunch. It's unclear if the title of Hindmost is actually meant to be read this way, or is a Cultural Translation into human terms.
  • Our Vampires Are Different: They are non-sentient, for starters.
    • Or at least they are until transformation into a Protector.
  • Overly Long Name: City Builders, and races influenced by their culture like the Machine People, have names five to six syllables long.
  • Prequel: The novels in the Fleet of Worlds series, co-written with Edward M. Lerner, are marketed on their front covers as prequels to Ringworld.
  • Proud Warrior Race: The Kzinti.
  • Proud Warrior Race Guy: Speaker-to-Animals (Later Chmeee) and his son, Acolyte.
  • Put on a Bus: In Ringworld's Children, the Hindmost only briefly mentions that Harkabeeparolyn and Kawaresksenjajok were returned to their hometown floating city, and they otherwise don't appear in the book at all. In a surprising case of They Just Didn't Care, Niven gets Harkabeeparolyn's name wrong and calls her Fortaralisplyar, who was a different male character from the same floating city in The Ringworld Engineers.
  • Razor Floss: Shadow square wire; Sinclair molecule chain.
  • Really 700 Years Old: Louis Wu is almost two-hundred and fifty years old by the end of the series but looks around twenty. It's implied Hindmost is (like most Puppeteers) several centuries older. And of course, Protectors can live for thousands of years.
    • The last novel has a character who's the last surviving true Pak Protector on the Ringworld. She's several MILLION years old.
  • Retcon: At the time Niven wrote Ringworld, he hadn't decided to Canon Weld his stories of the Belters and near-future space exploration, including Protector, into the same universe with the far-future stories of Beowulf Shaeffer and Louis Wu. This is why Nessus says "There is evidence enough that your species evolved on Earth," even though later novels show he would have known who the Pak were. It wasn't until after Niven established the future history of Known Space that he realized Pak Protectors were the most likely builders of the Ringworld.
    • Louis doesn't seem to know that the galactic core explosion was discovered by Beowulf Shaeffer. Later stories revealed that Shaeffer was his adopted father, and so must carefully note that Shaeffer kept his adventurous life a secret.
      • Which is quite odd, as Teela reads about Beowulf's trip to the galactic core in Louis's library in his mansion. Aparently, Louis never bothered to check into the publicly available materials on his fathers.
    • The fact that most Ringworlders pronounce Louis' name as "Luweewu" in The Ringworld Engineers implies that Louis uses the French pronunciation of his name. Ringworld's Children says he pronounces it "Loo-is."
      • That was actually an assumed name he took when he met up with some crash-landed ARM crewmembers, as Louis Wu is known to pretty much everyone and he didn't want to explain he was working for a Protector.
    • The inspiration for many of the sequels was to provide explanations for some of the technical problems invoked that other people found with the original design. (See Shown Their Work, below.)
    • The native bird-hunters encountered in the first book didn't understand what sickness was, apparently under Niven's assumption that the Ringworld's builders wouldn't have brought diseases into their artificial habitat. By the third novel, someone must've pointed out to him that new diseases would evolve from benign soil bacteria that would've been necessary for its ecosystem; the existence of plagues on the Ringworld is acknowledged when one of the Night People describes how they'd directed the necessary cremation of victims.
  • Rubber-Forehead Aliens: With the exception of the garden maps and food animals, any being with two arms and two legs is some sort of strange hominid species. Justified since they all evolved from the same common ancestor as human beings from Earth.
  • Schizo Tech: Ringworld, constructed as a kind of giant garden for children, is very low in metal elements. Technology hits a limit as there are no useful minerals available to be mined. There are just enough of the Pak's materials around for some civilizations to arise from time to time.
  • Sci-Fi Writers Have No Sense of Scale: Averted. Seriously averted. The scale of things is mentioned lots of times, usually in a "Holy crap, I can't believe how large this thing is" situation.
    • Not Drawn to Scale: However, many of the artists in various countries who paint cover art for the Ringworld novels have a hard time grasping the proportions of it. One of the few exceptions is Rick Sternbach's cover, pictured above.
    • A to-scale drawing of the Ringworld isn't very dramatic. As Niven himself put it in The Ringworld Engineers: "Picture fifty feet of baby-blue Christmas ribbon one inch wide. String it in a circle, on edge on the floor, and put a candle in the middle. Now expand the scale: The Ringworld was a ribbon of unreasonably strong material, a million miles wide and six hundred million miles long, strung in a circle ninety-five million miles in radius with a sun at the center."
  • Shown Their Work: Niven is famous for working out the problems in his ideas. The problems and questions asked in the first novel lead to a sequel which had still more problems leading to more sequels...
  • Spoiler Opening: The current edition of The Ringworld Engineers has a cover painting by Donato Giancola depicting a Protector, which spoils a major plot point of the book.
  • Starfish Aliens: Nessus is a Pierson's Puppeteer, a creature with three legs, two heads, and its brain in the middle of its body. Nessus is noted to have his heads look at one another, his equivalent of a laugh. The Ring also has some transplanted Jinxian Bandersnatchi, sentient slugs the size of a freight train.
  • Subspace Ansible: Faster-than-light communications technology does exist but it can't be used in a gravity well, so communicating across the Ringworld involves a lightspeed delay given it's just over sixteen light-minutes in diameter.
  • Tagalong Kid: Kawaresksenjajok.
  • Tragic Monster: Teela, after becoming a protector in The Ringworld Engineers and deliberately forcing Louis to kill her.
  • Transplanted Humans: Pak Protectors are a form of Homo habilis who built the Ringworld as a safe place for their breeders to survive the core explosion. They did not place any animal, not even an insect, which would harm a humanoid. That left many ecological niches empty, and after three million years the humanoids have evolved to fill the roles.
  • Unobtainium: The centrifugal force of the Ring is so great, any physically possible material would be torn apart under the stress. Niven posits scrith, a metal with tensile strength on the order of the force that holds atomic nuclei together.
    • The novel also has a room temperature superconductor that also superconducts heat, both of which become important plot points.
    • The General Products Hull is another example of Unobtainium. It's transparent to visible light and only visible light, and absolutely impervious to any kind of harm except outright disintegration by antimatter.
  • The Vamp: Halrloprillalar, a highly trained ship's whore.
  • Wacky Wayside Tribe: A number of Ringworlder communities encountered by the characters, like the Hairy Ones and the Grass Giants.
  • Weak, but Skilled: This is generally Louis' shtick through out the series until he eats Tree of Life.
  • Zero-G Spot: Louis Wu and Teela normally sleep and have sex in weightless sleeping pods, except when using positions and techniques that require gravity.

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alternative title(s): Ringworld
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