Planet of the Apes

The novel opens with a frame narrative. Jinn and Phyllis, a wealthy couple, sail through space in a light-propelled vessel near three suns. Phyllis spots a glass bottle floating in the void and retrieves it. Inside they find a manuscript written in the language of Earth, which Jinn knows well. He begins reading aloud.

The manuscript belongs to Ulysse Mérou, a French journalist who confides his account to space as a warning to the human race. In the year 2500, Mérou joined an interstellar expedition to Betelgeuse, a supergiant star roughly 300 light-years from Earth. The expedition's leader, Professor Antelle, a wealthy scientist, designed and funded a ship that travels near the speed of light; time dilation means the two-year journey aboard corresponds to over three centuries on Earth. The crew includes Antelle; his disciple Arthur Levain, a young physician; and Mérou, invited because he has no family and plays chess. They bring along a pet chimpanzee named Hector.

Upon reaching Betelgeuse, the crew discovers a habitable planet they name Soror for its resemblance to Earth. They descend in a smaller launch and land on a plateau surrounded by jungle. At a waterfall pool, they encounter a woman Mérou names Nova: golden-skinned and beautiful but with a disturbing vacancy in her eyes. She cannot speak, producing only shrill cries. When Hector appears, Nova seizes and strangles the chimpanzee before vanishing into the jungle. Dozens of similar humans soon emerge from the forest, all sharing Nova's beauty and blankness. They display no language, no tools, and no comprehension of the crew's gestures, and the sight of manufactured objects provokes them to fury. The natives ambush the crew, strip them naked, destroy the launch's instruments, and drag them to a primitive encampment where the inhabitants eat raw meat and live much as great apes do on Earth.

At dawn, a terrifying cacophony shatters the forest: drums, clashing metal, and unmistakably human shouts. The jungle humans flee in panic. Crawling to a hillock, Mérou witnesses a scene that overturns his understanding of the planet: the hunters driving the humans are gorillas dressed in tailored sporting clothes and wielding rifles, with chimpanzee loaders attending them. Their eyes hold a spark of intelligence entirely absent from Nova's kind. Levain breaks from cover in panic and is shot dead. Mérou sprints across the firing lane but stumbles into a concealed net and is captured.

The captives are loaded into caged carts and transported to a city where every inhabitant is an ape. Mérou is taken to the Institute for Advanced Biological Study and placed in a straw-lined cage. When he greets a gorilla warder in French, the apes roar with laughter. The next morning, a female chimpanzee named Zira, head of the department, arrives and shows keen interest in Mérou. He undergoes Pavlovian conditioning tests: whistles paired with food to trigger salivation, bells paired with electric shocks to trigger retreat. Recognizing the methods, Mérou deliberately demonstrates foreknowledge of each stimulus, hoping to prove that he reasons rather than merely reacts. When the pompous orangutan Zaius, the institute's senior scientist, inspects him, Mérou addresses the orangutan by name and disconnects the electric wire from his own cage, but Zaius stubbornly insists Mérou is merely a well-trained animal.

Weeks later, Mérou seizes Zira's notebook and draws the theorem of Pythagoras, conic sections, and diagrams of both the Betelgeuse and solar systems, marking his origin on Earth. A profound intellectual bond forms between them. Zira hides the drawings and warns Mérou to conceal his abilities from Zaius, who would have him sent for brain surgery. Her plan is to reveal Mérou at the upcoming annual biological congress, where press coverage can protect him from the scientific establishment. Through secret lessons, Zira teaches Mérou the simian language and explains Soror's society: chimpanzees form the intellectual class, gorillas hold political and physical power, and orangutans occupy positions of official science, relying on memorization rather than original thought. The planet has no nations or armies, only a unified government. Zira introduces Mérou to her fiancé Cornelius, a chimpanzee scholar researching the mysterious origins of simian civilization, who agrees to support the congress plan. At the city zoo, Mérou discovers Professor Antelle alive but mentally destroyed, behaving like the other captive humans with no recognition of his former companion.

At the congress, Zaius presents Mérou as a clever but mindless animal. Instead of performing the assigned demonstration, Mérou approaches the microphone and delivers a speech in fluent simian language, identifying himself as a rational being from Earth. The hall erupts. He describes human civilization, his voyage, and his capture, then proposes cooperation between species. The crowd roars its approval, and the Grand Council orders Mérou's immediate release.

Freed and clothed, Mérou works alongside Cornelius, who replaces the disgraced Zaius at the institute. Cornelius takes Mérou to a distant archaeological site where a buried city, far older than the 10,000 years of recorded simian history, contains remnants of houses, factories, and vehicles. The critical find is a china doll representing a human girl, dressed in tiny clothes with a mechanism that says "papa," proving that rational humans once inhabited Soror. Back at the institute, a young chimpanzee scientist named Helius uses electrical brain stimulation to awaken ancestral memories in a human woman. She speaks in multiple voices, narrating the collapse of human civilization: apes multiplied and grew defiant; a chimpanzee became the first ape to speak; humans grew intellectually lazy, abandoning books and initiative; apes imitated and then supplanted their masters, eventually rounding up the last humans with whips.

Meanwhile, Nova gives birth to Mérou's son. At three months, the baby begins to speak, confirming that the child is fully rational. The Grand Council views the child as a threat to the simian race. Cornelius warns Mérou that the authorities plan to seize the boy, surgically alter Mérou's brain, and kill Nova. Cornelius devises an escape: Mérou, Nova, and the baby will secretly replace three human test subjects aboard an artificial satellite scheduled for launch. The satellite's trajectory will pass near the orbiting spacecraft Mérou arrived in, allowing the family to board it. Sympathetic chimpanzees serve as accomplices. Before departing, Mérou and Zira share a tearful embrace, but when they nearly kiss, she recoils, weeping that he is "really too unattractive."

The substitution succeeds. Mérou names his son Sirius. During the voyage home, the boy's precocious speech inspires Nova, who gradually learns to talk, smile, and weep. They reach Earth, recognizing France and the Eiffel Tower from orbit, and land at Orly airport near Paris. A truck approaches. When the uniformed officer steps out, Nova screams and snatches Sirius back into the launch. Mérou stands frozen in horror: The officer is a gorilla. Earth, too, has been taken over by apes.

The narrative returns to the frame. Jinn dismisses the manuscript as fiction. Phyllis senses truth in parts but ultimately concurs: "Rational men? Men endowed with a mind? . . . No, that's not possible." Jinn steers with his four agile hands, and Phyllis takes out a compact to touch up her "dear little chimpanzee muzzle," revealing that both readers are apes and casting the entire story into ironic doubt.