Seveneves


Seveneves is a hard science fiction novel by Neal Stephenson published in 2015. The story tells of the desperate efforts to preserve Homo sapiens in the wake of apocalyptic events on Earth after the unexplained disintegration of the Moon and the remaking of human society as a space-based civilization after a severe genetic bottleneck.

Plot

Part One

At some unspecified date in the near future, an unknown agent causes the Moon to shatter into seven pieces. As the pieces begin to collide with one another, astronomer and science popularizer "Doc" Dubois Harris calculates that the number of collisions will increase exponentially. A large number of Moon fragments will begin entering Earth's atmosphere, forming a white sky and blanketing the Earth within two years with what he calls a "Hard Rain" of bolides, causing the atmosphere to heat to incandescence and the oceans to boil away, rendering Earth uninhabitable for thousands of years. The world's leaders decide to evacuate as many people and resources as possible to a "Cloud Ark" in orbit, including a swarm of "arklet" habitats that can avoid the debris from the Moon, both to attempt to preserve the human race and to prevent civil disorder from breaking out before the Hard Rain. Each nation is invited to choose a group of young people, dubbed "Arkies," for training to join the Cloud Ark.
The Cloud Ark is to be based around the International Space Station, currently commanded by American astronaut Ivy Xiao. The ISS is already bolted onto an iron Arjuna asteroid called Amalthea, which provides some protection against Moon debris. Robots are used to excavate Amalthea to provide more protection in a project that is run by mining and robotics engineer Dinah MacQuarie. Technicians and specialists, including Doc Dubois, are sent to the ISS in advance of the Hard Rain to prepare it to become the headquarters of the Cloud Ark.
The plan is that the Cloud Ark must be self-sufficient for 5000 years and capable of repopulating Earth once the Hard Rain ends. A Human Genetic Archive is sent to the Cloud Ark, with the intention that it will be used to rebuild the human population. Approximately 1500 people are launched into space in the two years before the Hard Rain begins.
Some suspect that the architects of the Cloud Ark are interested only in pacifying Earth's inhabitants with a false hope, rather than creating an environment that will actually survive in the long term, including billionaire Sean Probst, who realizes that the Cloud Ark will need a large supply of water to create propellant for the space station to keep from eventually falling into the Earth's atmosphere. He embarks on a two-year expedition to extract ice from a comet nicknamed Greg's Skeleton by using a nuclear reactor to provide power to bring it back towards Earth.

Part Two

The Hard Rain begins 701 days after the destruction of the Moon, as predicted. Human civilization as well as nearly all life on Earth is obliterated although some try to take shelter underground or in the deep ocean. Markus Leuker, appointed leader of the Cloud Ark, declares all nations of Earth to be dissolved, and imposes martial law under the Cloud Ark Constitution. Despite a worldwide agreement that members of government will not be launched into space, US President Julia Bliss Flaherty manages to get herself sent to the Cloud Ark at the last minute. Soon, most of the physical Human Genetic Archive is ruined in an Arklet accident, leaving only samples that had been distributed among the arks.
There is disagreement on the Cloud Ark about the best way to organize its society and avoid the debris of the Moon. Some Arkies want to convert the Cloud Ark into a decentralized swarm of small space vessels at a higher orbit out of range of debris, rather than to maintain the central authority of the ISS. Doc Dubois wants to shelter in the "Cleft", a Grand Canyon–sized crevasse on the now-exposed iron core of the Moon. Others want to go to Mars. Julia Flaherty, marginalized by the ISS crew, instead fosters the Arkies' swarm and Mars plans and so becomes their de facto spokesperson and leader.
Sean Probst's expedition succeeds and returns a comet ice fragment to Earth orbit. However, he and his party die of radiation sickness caused by nuclear fallout from their reactor before the expedition is complete. Markus Leuker and Dinah take a small crew to the comet to take control of it and bring it back to the Cloud Ark to provide sufficient propellant to reach the Cleft. Just before Dinah returns with the ice comet as the sole survivor of the mission, Julia Flaherty persuades the majority of the Arklets to abandon the ISS and to move to higher orbit in a decentralized swarm, and she sends a preliminary expedition to Mars. Her faction hacks the ISS's early warning system to mask its unauthorized departure, which causes the ISS to be struck by a bolide and suffer catastrophic damage, killing 300. The surviving portions of the Human Genetic Archive are carried along with Flaherty's Swarm, but the Arkies' ignorance causes the surviving portions are discarded or ignored. Only the digital version of the Human Genetic Archive survives aboard the ISS. The ISS, the ice comet, and remaining third of the Cloud Ark combine into a new ship rechristened Endurance, named after Ernest Shackleton's 1912 ship which pioneered exploration to Antarctica.
It takes three years for Endurance to reach the Cleft, and most of its population had died of cancer, accidents, and suicide, leaving only about 30 survivors. Meanwhile, Julia Flaherty's Swarm is even more decimated by coronal mass ejections from which they are much less shielded than Endurance and by a collapse in food production. The Swarm resorts to cannibalism and even self-cannibalism before Flaherty's faction is overthrown. By the end of three years, only 11 survive, including Flaherty and the leader of the opposing faction, Aïda. The survivors among both the Endurance and the Swarm are predominantly female, a result of the Cloud Ark being seeded with a three-to-one female-to-male sex ratio and of women's better resistance to the space environment. Aïda negotiates reuniting the Swarm with Endurance before it reaches the Cleft but, fearing that it will be ostracized by the crew, starts a battle for control of the ship, which ultimately fails but diminishes the population even further.
When Endurance reaches the safety of the Cleft, there are only eight surviving Homo sapiens in space, all of whom are women. One, the sociologist Luisa, has reached menopause, and the remaining seven come to be known as the Seven Eves. The Human Genetic Archive has been destroyed, but there are sufficient resources for Moira to use the surviving genetics laboratory to rebuild the human race by automictic parthenogenesis. The first generation of babies must be female, but Moira will reconstruct the Y chromosome in the second generation to re-enable natural reproduction without the aid of technology. They agree that each of the Seven Eves gets to choose how her offspring will be genetically modified or enhanced. Aïda predicts that hundreds of years thereafter, the project shall result in seven new races.

Part Three

There are now three billion humans living in a man-made ring of different "habitats" circling the Earth 5000 years later. Consisting of seven races, each of which was descended from and named after the Seven Eves who survived the events of Part 2, humanity now has quite distinct racial characteristics. For instance, Moirans can undergo epigenetic shifts, radically changing their bodies in response to new environments. Most of the iron core of the Moon has been used to build space habitats along the ring, but Cleft itself has been turned into the "Cradle," an exclusive piece of real estate attached to a tether that occasionally "docks" with Earth along the equator.
Humanity has divided mostly along racial lines into two distinct camps, Red and Blue, which are engaged in a form of Cold War that is characterized by cultural isolation, espionage and border skirmishes, mediated by treaty agreements that are more occasionally breached than observed.
The orbiting races, or Spacers, terraform Earth by crashing ice comets into it to replenish the oceans and seed the planet with genetically-created organisms based upon re-sequenced DNA data that was saved before the Hard Rain. Once Earth's biosphere is restored, some Spacers resettle the planet in violation of treaty agreements and are eventually dubbed "Sooners."
A "Seven," a group of seven people with one member from each race, is recruited by "Doc" Hu Noah to investigate mysterious people who have been sighted on Earth. As the story unfolds, they discover that some humans indeed survived the Hard Rain on the planet by living in deep mines, and others survived in ocean trenches using submarines. Although the survivors have also evolved socially and biologically to form two additional races, the survival of "root stock" humanity separate from the Seven Eves causes turmoil in Spacer high politics. Ground conflict eventually occurs because each of the orbiting camps wishes to establish a preferential or exclusive relationship with the Earthbound races: the Diggers, although descendants of Dinah's family, interpret the Blue's presence on their territory as an act of aggression and develop an alliance with Red, prompting Blue to seek out an alliance with the Pingers on the strength of Ivy's connection with one of their founders. Matters are further complicated because the Diggers claim all of the Earth's land surface as their own and initially hold the Spacers in disdain for having fled the planet eons ago.
In an epilogue, it is revealed that a separate, secret underwater ark had been created concurrently with the Cloud Ark, leading to the development of the Pingers, based on analysis of the "selfies" that Ivy's fiance had sent her revealing clues in diagrams and sketches in each photo's background. Ty invites the surviving Seven back to apartments at his bar in the Cleft with the intent of forming the first "Nine."

Characters

Parts One and Two

The Seven Eves

Stephenson first began planning his novel around 2006, while he was working at Blue Origin. He observed: "Some researchers had begun to express concern over the possibility that a collision between two pieces of debris might spawn a large number of fragments, thereby increasing the probability of further collisions and further fragments, producing a chain reaction that might put so much debris into low Earth orbit as to create a barrier to future space exploration. Having been raised on the idea of 'Space, the Final Frontier', I was both appalled and fascinated by the possibility that it might instead become an impenetrable ceiling only a hundred or so miles above our heads." Such a collisional domino effect of satellite destruction is known as the Kessler syndrome.
He would continue to develop Seveneves over the next eight years, as Stephenson tried to "stick to legit science as much as I can".

Reception

, critical reception for Seveneves has been mostly positive. A review in the Chicago Tribune commented on the book's length, stating "when Stephenson finds a theme commensurate with his ambition, all those pages can speed by like a bullet train. Seveneves offers at once his most conventional science-fiction scenario and a superb exploration of his abiding fascination with systems, philosophies and the limits of technology." Booklist also praised the work, writing "Well-paced over three parts covering 5,000 years of humanity's future, Stephenson's monster of a book is likely to dominate your 2015 sf-reading experience."
Molecular biologist Jennifer Doudna praised the book as a "fantastic adventure across time and space, grounded in science but deeply thought-provoking about human nature and the future of our species".
Bill Gates recommended Seveneves as one of five books to read in the summer of 2016, praising in particular its scientific accuracy. He writes, "Seveneves reminded me of all the things I love about science fiction".
The Guardians Steven Poole was more critical in his review, criticizing the work as being overly descriptive, and observing: "Once we arrive in the novel's snail-paced last third, there are lots and lots of lavish descriptions of imaginary machines: city-sized orbiting habitats, giant pendulums reaching down into the Earth's atmosphere, 'sky trains'. After scores of pages of this, my eyelids were succumbing to a powerful gravitational force."
The Initiative for Interstellar Studies published a review in their quarterly online magazine focusing on the book’s use of orbital dynamics as one of the main technology themes forming the backdrop of the book.
The book was shortlisted for the 2016 Hugo Award for Best Novel.
The book also received the libertarian Prometheus Award of 2016.

Film adaptation

In 2016 Skydance Media hired screenwriter William Broyles Jr., director Ron Howard, and producer Brian Grazer to adapt the feature film.