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Alternate history or alternative history is a genre of fiction consisting of stories that are set in worlds in which history has diverged from the actual history of the world. It can be variously seen as a sub-genre of literary fiction, science fiction, and historical fiction; different alternate history works may use tropes from any or all of these genres. It is sometimes abbreviated AH. Another occasionally used term for the genre is "allohistory" (literally "other history").
Since the 1950s, this type of fiction has to a large extent merged with science fictional tropes involving cross-time travel between alternate histories or psychic awareness of the existence of "our" universe by the people in another; or ordinary voyaging uptime (into the past) or downtime (into the future) that results in history splitting into two or more time-lines. Cross-time, time-splitting and alternate history themes have become so closely interwoven that it is impossible to discuss them fully apart from one another. "Alternate History" looks at "what if" scenarios from some of history's most pivotal turning points and presents a completely different version, sometimes based on science and fact, but often based on conjecture. The exploration of how the world would look today if various changes occurred and what these alternate worlds would be like forms the basis of this vast subject matter.
In French, Italian, Spanish and German, alternate history novels are called uchronie. This neologism is based on the prefix u- (as in the word utopia, a place that does not exist) and the Greek for time, chronos. An uchronie, then, is defined as a time that does not exist, a "non-time." This term apparently also inspired the name of the alternate history book list, uchronia.net.
In writing an alternate history, the author makes the conscious choice to change something in our past. According to Steven H Silver, alternate history requires three things: 1) the story must have a point of divergence from the history of our world prior to the time at which the author is writing, 2) a change that would alter history as it is known, and 3) an examination of the ramifications of that change.
Several genres of fiction have been confused as alternate histories. Science fiction set in what was the future but is now the past, like Arthur C. Clarke's 2001: A Space Odyssey or Nineteen Eighty-Four , are not alternate history because the author has not made the conscious choice to change the past. Secret history, works that document things that are not known to have happened historically but would not have changed history had they happened, is also not to be confused with alternate history.
Alternate history is related to but distinct from counterfactual history—the term used by some professional historians when using thoroughly researched and carefully reasoned speculations on "what might have happened if..." as a tool of academic historical research.
The earliest example of an alternate history is Book IX, sections 17–19, of Livy's Ab Urbe condita. Livy contemplated an alternative 4th century BC in which Alexander the Great expanded his empire westward instead of eastward; Livy asked, "What would have been the results for Rome if she had been engaged in war with Alexander?"
Joanot Martorell's 1490 epic romance Tirant lo Blanc, written when the loss of Constantinople to the Turks was still a recent and traumatic memory to Christian Europe, tells the story of the valiant knight Tirant The White from Brittany who gets to the embattled remnant of the Byzantine Empire, becomes a Megaduke and commander of its armies, and manages to fight off the invading Ottoman armies of Mehmet II, save the city from Islamic conquest, and even chase the Turks deeper into lands they had conquered before.
One of the earliest works of alternate history published in large quantities for the reception of a popular audience may be the French Louis Geoffroy's Histoire de la Monarchie universelle: Napoléon et la conquête du monde (1812–1832) (History of the Universal Monarchy: Napoleon And The Conquest Of The World) (1836), which imagines Napoleon's First French Empire victorious in the French invasion of Russia in 1811 and in an invasion of England in 1814, later unifying the world under Bonaparte's rule.
In the English language, the first known complete alternate history is Nathaniel Hawthorne's short story "P.'s Correspondence", published in 1845. It recounts the tale of a man who is considered "a madman" due to his perceiving a different 1845, a reality in which long-dead famous people are still alive such as the poets Burns, Byron, Shelley, and Keats, the actor Edmund Kean, the British politician George Canning and even Napoleon Bonaparte.
The first novel-length alternate history in English would seem to be Castello Holford's Aristopia (1895). While not as nationalistic as Louis Geoffroy's Napoléon et la conquête du monde, 1812–1823, Aristopia is another attempt to portray a utopian society. In Aristopia, the earliest settlers in Virginia discover a reef made of solid gold and are able to build a Utopian society in North America.
A number of alternate history stories and novels appeared in the late 19th and early 20th centuries (see, for example, Charles Petrie's If: A Jacobite Fantasy ). In 1931, British historian Sir John Squire collected a series of essays from some of the leading historians of the period in the anthology If It Had Happened Otherwise. In this work, scholars from major universities as well as important non-university-based authors turned their attention to such questions as "If the Moors in Spain Had Won" and "If Louis XVI Had Had an Atom of Firmness". The essays range from serious scholarly efforts to Hendrik Willem van Loon's fanciful and satiric portrayal of an independent 20th century Dutch city state on the island of Manhattan. Among the authors included were Hilaire Belloc, André Maurois, and Winston Churchill.
One of the entries in Squire's volume was Churchill's "If Lee Had Not Won the Battle of Gettysburg," written from the viewpoint of a historian in a world where the Confederacy had won the American Civil War, considering what would have happened if the north had been victorious (in other words, a character from an alternate world imagining a world more like the real one we live in, although not identical in every detail). This kind of speculative work, which posts from the point of view of an alternate history is variously known as a "recursive alternate history", a "double-blind what-if" or an "alternate-alternate history".
American humorist author James Thurber parodied alternate history stories about the American Civil War in his 1930 story, "If Grant had been drinking at Appomattox", which he accompanied with this very brief introduction: “Scribner's magazine is publishing a series of three articles: ‘If Booth Had Missed Lincoln’, ‘If Lee Had Won the Battle of Gettysburg’, and ‘If Napoleon Had Escaped to America’. This is the fourth”
Another example of alternate history from this period (and arguably the first to explicitly posit cross-time travel from one universe to another as anything more than a visionary experience) is H.G. Wells' Men Like Gods (1923) in which several Englishmen are transferred via an accidental encounter with a cross-time machine into an alternate universe featuring a seemingly pacifistic and utopian Britain. When the Englishmen, led by a satiric figure based on Winston Churchill, try to seize power, the utopians simply point a ray gun at them and send them on to someone else's universe. Wells describes a multiverse of alternative worlds, complete with the paratime travel machines that would later become popular with U.S. pulp writers, but since his hero experiences only a single alternate world this story is not very different from conventional alternate history.
The 1930s would see alternate history move into a new arena. The December 1933 issue of Astounding published Nat Schachner's "Ancestral Voices," quickly followed by Murray Leinster's "Sidewise in Time". While earlier alternate histories examined reasonably straightforward divergences, Leinster attempted something completely different. In his "world gone mad", pieces of Earth traded places with their analogs from different timelines. The story follows Professor Minott and his students from a fictitious Robinson College as they wander through analogues of worlds that followed a different history.
A somewhat similar approach was taken by Robert A. Heinlein in his 1941 novelette Elsewhen. A professor trains his mind to move his body across timelines. He then hypnotizes his students so they can explore more of them. Eventually each settles in the reality most suitable for him or her. Some of the worlds they visit are mundane, some very odd, and others follow science fiction or fantasy conventions.
The period around the second World War also saw the publication of the time travel novel Lest Darkness Fall by L. Sprague de Camp where an American academic travels to the Italy of the Ostrogoths at the time of the Byzantine invasion led by Belisarius. De Camp's work is concerned with the historical changes wrought by his time traveler, Martin Padway, thereby making the work an alternate history. Padway is depicted as making permanent changes and implicitly forming a new time branch.
Time travel as the cause of a point of divergence (creating two histories where before there was one, or simply replacing the future that existed before the time traveling event) has continued to be a popular theme: in Bring the Jubilee, by Ward Moore, the protagonist, who lives in an alternate history in which the Confederate States of America won the Civil War, travels through time and brings about a Union victory in the Battle of Gettysburg.
When a story's assumptions about the nature of time travel lead to the complete replacement of the visited time's future rather than just the creation of an additional time line, the device of a "time patrol" is often used, most notably in Poul Anderson's "Time Patrol"—racing uptime and downtime to preserve the "correct" history.
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H.G. Wells' "cross-time"/"many universes" variant (see above) was fully developed by De Camp in his 1940 short story "The Wheels of If" (Unknown Fantasy Fiction, October 1940), in which the hero is repeatedly shifted from one alternate history to another, each more remote from our own than the last.
This subgenre was used early on for purposes far removed from quasi-academic examination of alternative outcomes to historical events. Fredric Brown employed it to satirize the science fiction pulps and their adolescent readers—and fears of foreign invasion—in the classic What Mad Universe (1949). In Clifford D. Simak's Ring Around the Sun (1953), the hero ends up in an alternate earth of thick forests in which humanity never developed but where a band of mutants is establishing a colony; the story line appears to frame the author's anxieties regarding McCarthyism and the Cold War.
Also in the late 1940s and the 1950s, however, writers such as H. Beam Piper, Sam Merwin, Jr. and Andre Norton wrote thrillers set in a multiverse in which all alternate histories are co-existent and travel between them occurs via a technology involving portals and/or paratime capsules. These authors established the convention of a secret paratime trading empire that exploits and/or protects worlds lacking the paratime technology via a network of James Bond-style secret agents (Piper called them the "paratime police").
This concept provided a convenient framing for packing a smorgasbord of historical alternatives (and even of timeline "branches") into a single novel, either via the hero chasing or being chased by the villain(s) through multiple worlds or (less artfully) via discussions between the paratime cops and their superiors (or between paratime agents and new recruits) regarding the histories of such worlds.
The paratime theme is sometimes used without the police; Poul Anderson dreamed up the Old Phoenix tavern as a nexus between alternate histories. A character from a modern American alternate history Operation Chaos can thus appear in the English Civil War setting of A Midsummer's Tempest. In this context, the distinction between an alternate history and a parallel universe with some points in common but no common history may not be feasible, as the writer may not provide enough information to distinguish.
Paratime thrillers published in recent decades often cite the many-worlds interpretation of quantum mechanics (first formulated by Hugh Everett III in 1957) to account for the differing worlds. Some science fiction writers interpret the splitting of worlds to depend on human decision-making and free will, while others rely on the butterfly effect from chaos theory to amplify random differences at the atomic or subatomic level into a macroscopic divergence at some specific point in history; either way, science fiction writers usually have all changes flow from a particular historical point of divergence (often abbreviated 'POD' by fans of the genre). Prior to Everett, science-fiction writers drew on higher dimensions and the speculations of P. D. Ouspensky to explain their characters' cross-time journeys.
While many justifications for alternate histories involve a multiverse, the "many world" theory would naturally involve many worlds, in fact a continually exploding array of universes. In quantum theory, new worlds would proliferate with every quantum event, and even if the writer uses human decisions, every decision that could be made differently would result in a different timeline. A writer's fictional multiverse may, in fact, preclude some decisions as humanly impossible, as when, in Night Watch, Terry Pratchett depicts a character informing Vimes that while anything that can happen, has happened, nevertheless there is no history whatsoever in which Vimes has ever murdered his wife. When the writer explicitly maintains that all possible decisions are made in all possible ways, one possible conclusion is that the characters were neither brave, nor clever, nor skilled, but simply lucky enough to happen on the universe in which they did not choose the cowardly route, take the stupid action, fumble the crucial activity, etc.; few writers focus on this idea, although it has been explored in stories such as Larry Niven's All the Myriad Ways, where the reality of all possible universes leads to an epidemic of suicide and crime because people conclude their choices have no moral import.
In any case, even if it is true that every possible outcome occurs in some world, it can still be argued that traits such as bravery and intelligence might still affect the relative frequency of worlds in which better or worse outcomes occurred (even if the total number of worlds with each type of outcome is infinite, it is still possible to assign a different measure to different infinite sets). The physicist David Deutsch, a strong advocate of the many-worlds interpretation of quantum mechanics, has argued along these lines, saying that "By making good choices, doing the right thing, we thicken the stack of universes in which versions of us live reasonable lives. When you succeed, all the copies of you who made the same decision succeed too. What you do for the better increases the portion of the multiverse where good things happen." This view is perhaps somewhat too abstract to be explored directly in science fiction stories, but a few writers have tried, such as Greg Egan in his short story The Infinite Assassin, where an agent is trying to contain reality-scrambling "whirlpools" that form around users of a certain drug, and the agent is constantly trying to maximize the consistency of behavior among his alternate selves, attempting to compensate for events and thoughts he experiences but he guesses are of low measure relative to those experienced by most of his other selves.
Many writers—perhaps the majority—avoid the discussion entirely. In one novel of this type, H. Beam Piper's Lord Kalvan of Otherwhen, a Pennsylvania State Police officer, who knows how to make gunpowder, is transported from our world to an alternate universe where the recipe for gunpowder is a tightly held secret and saves a country that is about to be conquered by its neighbors. The paratime patrol members are warned against going into the timelines immediately surrounding it, where the country will be overrun, but the book never depicts the slaughter of the innocent thus entailed, remaining solely in the timeline where the country is saved.
The cross-time theme was further developed in the 1960s by Keith Laumer in the first three volumes of his Imperium sequence, which would be completed in Zone Yellow (1990). Piper's politically more sophisticated variant was adopted and adapted by Michael Kurland and Jack Chalker in the 1980s; Chalker's G.O.D. Inc trilogy (1987–89), featuring paratime detectives Sam and Brandy Horowitz, marks the first attempt at merging the paratime thriller with the police procedural. Kurland's Perchance (1988), the first volume of the never-completed "Chronicles of Elsewhen", presents a multiverse of secretive cross-time societies that utilize a variety of means for cross-time travel, ranging from high-tech capsules to mutant powers. Harry Turtledove has launched the Crosstime Traffic series for teenagers featuring a variant of H. Beam Piper's paratime trading empire.
The concept of a cross-time version of a world war, involving rival paratime empires, was developed in Fritz Leiber's Change War series, starting with the Hugo Award winning The Big Time (1958); followed by Richard C. Meredith's Timeliner trilogy in the 1970s, Michael McCollum's A Greater Infinity (1982) and John Barnes' Timeline Wars trilogy in the 1990s.
Such "paratime" stories may include speculation that the laws of nature can vary from one universe to the next, providing a science fictional explanation—or veneer—for what is normally fantasy. Aaron Allston's Doc Sidhe and Sidhe Devil take place between our world, the "grim world" and an alternate "fair world" where the Sidhe retreated to. Although technology is clearly present in both worlds, and the "fair world" parallels our history, about fifty years out of step, there is functional magic in the fair world. Even with such explanation, the more explicitly the alternate world resembles a normal fantasy world, the more likely the story is to be labeled fantasy, as in Poul Anderson's "House Rule" and "Loser's Night."
In both science fiction and fantasy, whether a given parallel universe is an alternate history may not be clear. The writer might allude to a POD only to explain the existence and make no use of the concept, or may present the universe without explanation to its existence.
In 1962, Philip K. Dick published The Man in the High Castle, an alternate history in which Nazi Germany and Imperial Japan won World War II. This book contained an example of "alternate-alternate" history, in that one of its characters is the author of a book in which the Allies won the war.
It was followed by Vladimir Nabokov's Ada or Ardor: A Family Chronicle (1969), a story of incest that takes place within an alternate North America settled in part by Czarist Russia, and that borrows from Dick's idea of "alternate-alternate" history (the world of Nabokov's hero is wracked by rumors of a "counter-earth" that apparently is ours). Some critics believe that the references to a counter-earth suggest that the world portrayed in Ada is a delusion in the mind of the hero (another favorite theme of Dick's novels). Strikingly, the characters in Ada seem to acknowledge their own world as the copy or negative version, calling it "Anti-Terra" while its mythical twin is the real "Terra." Not only history but science has followed a divergent path on Anti-Terra: it boasts all the same technology as our world, but all based on water instead of electricity. When a character in Ada makes a long-distance call, all the toilets in the house flush at once to provide hydraulic power.
Isaac Asimov's short story What If-- is about a couple who can explore alternate realities by means of a television-like device. This idea can also be found in Asimov's 1955 novel The End of Eternity. In that novel, the "Eternals" can change the realities of the world, without people being aware of it. In his Hugo-winning novel, The Gods Themselves, Asimov imagines parallel universes where the laws of physics, specifically the strong force, are different so that materials transferred between them can be used as energy sources. An isotope of a metal that is stable in one universe is unstable in the other and becomes radioactive, releasing energy, when transferred. The process works both ways, apparently to the benefit of both sets of inhabitants, but in each universe there are those who realize that mixing the laws of physics will eventually destroy our Earth by causing the Sun to explode.
Guido Morselli described the defeat of Italy (and subsequently France) in World War I in his 1975 novel Past Conditional (Contro-passato prossimo) where the static Alpine front line which divided Italy from Austria during that war collapses when the Germans and the Austrians forsake trench warfare and adopt blitzkrieg twenty years in advance.
Kingsley Amis set his 1976 novel The Alteration in the 20th century, but major events in the Reformation did not take place, and Protestantism is limited to the breakaway Republic of New England. Martin Luther was reconciled to the Roman Catholic Church and later became Pope Germanian I.
The Plot Against America (2004) by Philip Roth looks at an America where Franklin D. Roosevelt is defeated in 1940 in his bid for a third term as President of the United States, and Charles Lindbergh is elected, leading to increasing fascism and anti-Semitism in the U.S.
Michael Chabon, occasionally an author of speculative fiction, contributed to the genre with his 2007 novel The Yiddish Policemen's Union. This book explores a world in which the State of Israel was destroyed in its infancy and many of the world's Jews instead live in a small strip of Alaska set aside by the US government for Jewish settlement. The story follows a Jewish detective solving a murder case in the Yiddish-speaking city of Sitka. Stylistically, Chabon borrows heavily from the noir and detective fiction genres, while exploring social issues related to Jewish history and culture.
The late 1980s and the 1990s saw a boom in popular-fiction versions of alternate history, fueled by the emergence of the prolific alternate history author Harry Turtledove, as well as the development of the steampunk genre and two series of anthologies—the What Might Have Been series edited by Gregory Benford and the Alternate ... series edited by Mike Resnick. This period also saw alternate history works by S.M. Stirling, Kim Stanley Robinson, Harry Harrison, Howard Waldrop and others.
Since the late 1990s, Harry Turtledove has been the most prolific practitioner of alternate history and has been given the title "Master of Alternate History" by some. His books include those of Timeline 191 (a.k.a. Southern Victory), in which Confederate States of America won the American Civil War, and the Worldwar series, in which aliens invaded Earth during World War II. Other stories by Turtledove include A Different Flesh, in which America was not colonized from Asia during the last ice age; In the Presence of Mine Enemies, in which the Nazis won World War II; and Ruled Britannia, in which the Spanish Armada succeeded in conquering Britain in the Elizabethan era, with William Shakespeare being given the task of writing the play that will motivate the Britons to rise up against their Spanish conquerors. He also co-authored a book with actor Richard Dreyfuss The Two Georges, in which the United Kingdom retained the American colonies, with George Washington and King George III making peace. He did a two-volume series in which the Japanese not only bombed Pearl Harbor but also invaded and occupied the Hawaiian Islands.
Perhaps the most incessantly explored theme in popular alternate history focuses on worlds in which the Nazis won World War Two. In some versions, the Nazis and/or Axis Powers conquer the entire world; in others, they conquer most of the world but a "Fortress America" exists under siege; while in others, there is a Nazi/Japanese Cold War comparable to the US/Soviet equivalent in 'our' timeline. Fatherland (1992) by Robert Harris, is set in Europe following the Nazi victory. Several writers have posited points of departure for such a world but then have injected time splitters from the future or paratime travel for instance James P. Hogan's The Proteus Operation. Norman Spinrad wrote The Iron Dream in 1972, which is intended to be a science fiction novel written by Adolf Hitler after fleeing from Europe to North America in the 1920s.
In Jo Walton's "Small Change" series, the United Kingdom made peace with Hitler before the involvement of the United States in World War II, and fascism slowly strangled the UK. Former House Speaker Newt Gingrich and William R. Forstchen have written a novel, 1945, in which the U.S. defeated Japan but not Germany in World War II, resulting in a Cold War with Germany rather than the Soviet Union. Gingrich and Forstchen neglected to write the promised sequel; instead, they wrote a trilogy about the American Civil War, starting with Gettysburg: A Novel of the Civil War, in which the Confederates win a victory at the Battle of Gettysburg. Also from that general era, Martin Cruz Smith, in his first novel, posited an independent American Indian nation following the defeat of Custer in The Indians Won (1970).
Beginning with The Probability Broach in 1981, L. Neil Smith wrote several novels that postulated the disintegration of the U.S. Federal Government during the Whiskey Rebellion and the creation of a libertarian utopia.
A recent time traveling splitter variant involves entire communities being shifted elsewhere to become the unwitting creators of new time branches. These communities are transported from the present (or the near-future) to the past or to another time-line via a natural disaster, the action of technologically advanced aliens, or a human experiment gone wrong. S. M. Stirling wrote the Island in the Sea of Time trilogy, in which Nantucket Island and all its modern inhabitants are transported to Bronze Age times to become the world's first superpower. In Eric Flint's 1632 series, a small town in West Virginia is transported to 17th century central Europe and drastically changes the course of the Thirty Years' War, which was then underway. John Birmingham's Axis of Time trilogy deals with the culture shock when a United Nations naval task force from 2021 finds itself back in 1942 helping the Allies against the Empire of Japan and the Germans (and doing almost as much harm as good in spite of its advanced weapons). Similarly, Robert Charles Wilson's Mysterium depicts a failed U.S. government experiment which transports a small American town into an alternative version of the U.S. run by believers in a form of Christianity known as Gnosticism, who are engaged in a bitter war with the "Spanish" in Mexico. (The chief scientist at the laboratory where the experiment occurred is described as a Gnostic, and references to Christian Gnosticism appear repeatedly in the book.)
Many fantasies and science fantasies are set in a world that has a history somewhat similar to our own world, but with magic added. Some posit points of divergence, but some also feature magic altering history all along. One example of a universe that is in part historically recognizable but also obeys different physical laws is Poul Anderson's Three Hearts and Three Lions in which the Matter of France is history, and the fairy folk are real and powerful. A partly familiar European history for which the author provides a point of divergence is Randall Garrett's "Lord Darcy" series: a monk systemizing magic rather than science, so the use of foxglove to treat heart disease is called superstition. The other great point of divergence in this timeline occurs in 1199, when Richard the Lionheart survives the Siege of Chaluz and returns to England, making the Angevin Empire so strong it survives into the 20th century.
Jonathan Strange & Mr Norrell takes place in an alternative version of England where a separate Kingdom ruled by the Raven King and founded on magic existed in Northumbria for over 300 years. In Patricia Wrede's Regency fantasies, Great Britain has a Royal Society of Wizards, and in Poul Anderson's A Midsummer Tempest William Shakespeare is remembered as the Great Historian, with the novel itself taking place in the era of Oliver Cromwell and Charles I, with an alternate outcome for the English Civil War and an earlier Industrial Revolution.
The Tales of Alvin Maker series by Orson Scott Card (a parallel to the life of Joseph Smith, Jr., founder of the Latter Day Saint movement) takes place in an alternate America, beginning in the early 19th century. Prior to that time, a POD occurred: England, under the control of Oliver Cromwell, had banished "makers", or anyone else demonstrating "knacks" (an ability to perform seemingly supernatural feats) to the North American continent. Thus the early American colonists embraced as perfectly ordinary these gifts, and counted on them as a part of their daily lives. The political divisions of the continent is considerably altered, with two large English colonies bookending a smaller "American" nation, one aligned with England, and the other governed by exiled Cavaliers. Actual historical figures are seen in a much different light: Ben Franklin is revered as the continent's finest "maker", George Washington was executed at the hands of an English army, and "Tom" Jefferson is the first president of "Apallachee", the result of a compromise between the Continentals and the British.
On the other hand, when the "Old Ones" still manifest themselves in England in Keith Roberts's Pavane, which takes place in a technologically backward world after a Spanish assassination of Elizabeth I allowed the Spanish Armada to conquer England, the possibility that the fairies were real but retreated from modern advances makes the POD possible: the fairies really were present all along, in a secret history. Again, in the English Renaissance fantasy Armor of Light by Melissa Scott and Lisa A. Barnett, the magic used in the book, by Dr. John Dee and others, actually was practiced in the Renaissance; positing a secret history of effective magic makes this an alternate history with a POD, Sir Philip Sidney's surviving the Battle of Zutphen, and shortly thereafter saving the life of Christopher Marlowe.
Many works of fantasy posit a world in which known practitioners of magic were able to make it function, and where the consequences of such reality would not, in fact, disturb history to such an extent as to make it plainly alternate history. Many ambiguous alternate/secret histories are set in Renaissance or pre-Renaissance times, and may explicitly include a "retreat" from the world, which would explain the current absence of such phenomena.
When the magical version of our world's history is set in contemporary times, the distinction becomes clear between alternate history on the one hand and contemporary fantasy, using in effect a form of secret history (as when Josepha Sherman's Son of Darkness has an elf living in New York City, in disguise) on the other. In works such as Robert A. Heinlein's Magic, Incorporated where a construction company can use magic to rig up stands at a sporting event and Poul Anderson's Operation Chaos and its sequel Operation Luna, where djinns are serious weapons of war—with atomic bombs—the use of magic throughout the United States and other modern countries makes it clear that this is not secret history—although references in Operation Chaos to degaussing the effects of cold iron make it possible that it is the result of a POD. The sequel clarifies this as the result of a collaboration of Einstein and Planck in 1901, resulting in the theory of "rheatics". Henry Moseley applies this theory to "degauss the effects of cold iron and release the goetic forces." This results in the suppression of ferromagnetism and the reemergence of magic and magical creatures.
Alternate history shades off into other fantasy subgenres when the use of actual, though altered, history and geography decreases, although a culture may still be clearly the original source; Barry Hughart's Bridge of Birds and its sequels take place in a fantasy world, albeit one clearly based on China, and with allusions to actual Chinese history, such as the Empress Wu. Richard Garfinkle's Celestial Matters incorporates ancient Chinese physics and Greek Aristotelian physics, using them as if factual.
A fantasy version of the paratime police was developed by children's writer Diana Wynne Jones in her Chrestomanci quartet (1977–1988), with wizards taking the place of high tech secret agents. Among the novels in this series, Witch Week stands out for its vivid depiction of a history alternate to that of Chrestomanci's own world rather than our own (and yet with a specific POD that turned it away from the "normal" history of most worlds visited by the wizard).
Terry Pratchett's works include several references to alternate histories of Discworld. Men At Arms observes that in millions of universes, Edward d'Eath became an obsessive recluse rather than the instigator of the plot that he is in the novel. In Jingo, Vimes accidentally picks up a pocket organizer that should have gone down another leg of the Trousers of Time, and so can hear the organizer reporting on the deaths that would have occurred had his decision gone otherwise. Indeed, Discworld contains an equivalent of the Time Patrol in its History Monks. Night Watch revolves around a repair of history after a time traveler's murder of an important figure in Vimes's past. Thief of Time presents them functioning as a full-scale Time Patrol, ensuring that history occurs at all.
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In 1953, the NBC radio network aired a show called Stroke of Fate that posited different point of divergence creating an alternate time-line for each episode and dramatized the results along with commentary from various historians. Episodes included changes in the American Civil War, Alexander the Great surviving his illness, an alternate fate for James Wolfe at Quebec City, no Julius Caesar assassination, a different outcome of Aaron Burr's duel amongst other stories. All episodes have been preserved.
The idea of an alternate history was used for satiric and comedic effect in the BBC Radio comedy Married. The protagonist, a confirmed bachelor, awakes one morning in a world where he has a wife and two children, and people familiar to him are radically changed. One historical divergence in this world, exploited mostly for comedy, was the decision of King Edward VIII not to abdicate in 1936. His heirs were a King Richard and a King John, the latter of whom was openly homosexual.
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Several films have been made that exploit the concepts of alternate history, most notably Kevin Brownlow's It Happened Here (1966), depicting a Nazi-occupied Britain. Other alternate history films include the HBO TV movie Fatherland (1994), set in the 1960s in a world where Germany won World War II, based on Robert Harris's novel of the same name. Although foretelling a world where Germany is poised to be defeated in World War II, Quentin Tarantino's Inglourious Basterds offers a satirical revenge fantasy where a plot to assassinate Adolf Hitler succeeds.
Alternate histories in film are sometimes presented as mockumentaries to provide verisimilitude to fictional events, including C.S.A.: The Confederate States of America (2004), a satirical look at the history of an America where the South won the Civil War.
Other examples of cinematic alternate history are: 2009 Lost Memories (2002), a Korean film supposing that Hirobumi Ito was not assassinated by An Jung-geun in Harbin, China, in 1909; and Timequest (2002), in which a time traveler prevents the assassination of John F. Kennedy, resulting in an altered subsequent history.
A few movies about alternative universes focus on individuals rather than historical events, for example, Frank Capra's It's a Wonderful Life, and more recently the Back to the Future series of films, Blind Chance, Sliding Doors, Run Lola Run, Me Myself I, The Butterfly Effect, Groundhog Day, Frequency, Inglourious Basterds and Source Code.
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Several TV series also exploit the concept of alternate history. The science fiction television show Sliders presented alternate histories under the science-inspired guise of quantum-navigating the multiverse. The vast majority of alternate Americas in most episodes are nasty dystopias, although sometimes this is not evident at first.
In Lost, the characters time travel to 1977 past and attempt to create an alternate history. However, while the only intended ramifications were for Flight 815 to land in Los Angeles, instead, it is revealed that their actions were the cause of the crash, ultimately.
Other non-alternate history television shows have explored the concept. Star Trek has used the theme several times. Examples include: TOS—"The City on the Edge of Forever" (alternate World War II outcome); Animated Series—"Yesteryear"; TNG—"Yesterday's Enterprise", and Enterprise's "Storm Front" Also, the universe of "Mirror, Mirror", while in the original episode was just implied to be a parallel universe, was in later episodes (of DS9 and Enterprise) shown to have an alternate history.
The British TV series Doctor Who had a few episodes that involved an alternate Earth where Pete Tyler, father of Rose Tyler, was alive, successful, and rich, unlike the Pete Tyler on the original Earth, who died when Rose was a baby and had been unsuccessful in business. The Tenth Doctor, Rose, and Mickey Smith visited the alternate Earth by accident in "Rise of the Cybermen" and "The Age of Steel". The second season finale "Army of Ghosts" and "Doomsday" also involved travel to the same alternate Earth, and the series four episode "Turn Left" showed an alternate history where the Tenth Doctor has been killed during the Racnoss attack. During the Third Doctor's tenure he visited an alternative Earth with a fascist-style British Government that has executed the Royal Family (and fascist counterparts of his friends/companions Liz Shaw, Brigadier Lethbridge-Stewart and Sergeant Benton) in Inferno, from which he is able to learn of a danger that also threatens his Earth.
In the seventies SF children's series The Tomorrow People, "A Rift in Time" (1974) depicted an attempted historical change by time travellers from an alternate-universe Roman Empire that developed steam engines in the 1st century, never fell as a result, had a 1,500-year technological head-start over our own world and by its "20th century," controlled a galactic empire.
The fourth season of the television series Fringe takes place in an alternate timeline in which Peter Bishop died shortly after the prime universe's Walter Bishop brought him to the prime universe. This resulted in a butterfly effect in which every main character's life was profoundly changed with the absence of Peter.
On October 13, 2011, the Community episode "Remedial Chaos Theory" includes seven alternate timelines in the lives of the show's seven main characters, dependent on which of the seven went to get the pizza delivered to the apartment.
Various anime productions have also used the genre:
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The dramatic possibilities of alternate history provide a diverse genre for exploration in role-playing games. Many games use an alternate historical background for their campaigns. In particular, the fourth edition of GURPS uses a setting containing multiple different alternate histories as its default campaign setting, with the supplement GURPS Infinite Worlds detailing a large number of alternate worlds included in the setting, many of them carryovers from the third-edition GURPS supplements GURPS Alternate Earths and GURPS Alternate Earths II.
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For the same reasons that this genre is explored by role-playing games, alternate history is also an intriguing backdrop for the storylines of many video games. A famous example of an alternate history game is Command & Conquer: Red Alert. Released in 1996, the game presents a point of divergence in 1946 where Albert Einstein goes back in time to prevent World War II from ever taking place by erasing Adolf Hitler from time after he is released from Landsberg Prison in 1924. He is successful in his mission, but in the process allows Joseph Stalin and the Soviet Union to become powerful enough—as a direct result of not having a strong rival dictator like Hitler to keep his power in check—to launch a massive campaign to conquer Europe, sparking an alternate (and ultimately costlier) version of the Second World War and, eventually, World War III not once but twice: one where the USSR invades the continental US in the 1970s, and a second where a small group of Soviet leaders, attempting to preempt their defeat, go back in time and eliminate Einstein but end up in a conflict with both the West and a third Japanese side.
In the Civilization Series, the player guides a civilization from prehistory to the present day, creating radically altered versions of history on a long time-scale. Several scenarios recreate a particular period which becomes the "point of divergence" in an alternate history shaped by the player's actions. Popular examples in Sid Meier's Civilization IV include Desert War, set in the Mediterranean theater of World War II and featuring scripted events tied to possible outcomes of battles; Broken Star, set in a hypothetical Russian civil war in 2010; and Rhye's and Fall of Civilization, an 'Earth simulator' designed to mirror a history as closely as possible but incorporating unpredictable elements to provide realistic alternate settings.
In some games such as the Metal Gear and Resident Evil series, events that were originally intended to represent the near future at the time the games were originally released later ended up becoming alternative histories in later entries in those franchises. For example, Metal Gear 2: Solid Snake (1990), set in 1997, depicted a near future that ended up becoming an alternative history in Metal Gear Solid (1998). Likewise, Resident Evil (1996) and Resident Evil 2 (1998), both set in 1998, depicted near-future events that had later become an alternative history by the time Resident Evil 4 (2005) was released.
Crimson Skies is one example of an alternate history spawning multiple interpretations in multiple genres. The stories and games in Crimson Skies take place in an alternate 1930s United States, where the nation crumbled into many hostile states following the effects of the Great Depression, the Great War, and Prohibition. With the road and railway system destroyed, commerce took to the skies. Great cargo zeppelins escorted by fighter squadrons are the targets of many ruthless air pirates and enemy countries. This world has featured in a board game, a PC game, an Xbox game, a collectible miniature game and various promotional novels, comics and short stories.
The game Freedom Fighters portrays a situation similar to that of the movie Red Dawn and Red Alert 2, though less comically than the latter. The point of divergence is during World War II, where the Soviet Union develops an atomic bomb first and uses it on Berlin. With the balance of power and influence tipped in Russia's favor, history diverges; brief summaries at the beginning of the game inform the player of the Communist bloc's complete takeover of Europe by 1953, a different ending to the Cuban Missile Crisis, and the spread of Soviet influence into South America and Mexico. The plot of the game revolves around a Soviet invasion of the United States and the resistance fighting in New York City.
Similarly, the 2007 video game World in Conflict is set in 1989, with the Soviet Union on the verge of collapse. The point of divergence is several months before the opening of the game, when Warsaw Pact forces staged a desperate invasion of Western Europe. As the game begins, a Soviet invasion force lands in Seattle, taking advantage of the fact that most of the US military is in Europe. The game is divided into three parts: the first focuses on the fighting retreat from Seattle towards Fort Teller in the Cascade Mountains; the second is a flashback to the recent fighting in Europe, which culminated in a Soviet attack on Manhattan; the third chronicles the fight to retake Seattle before a Chinese fleet arrives, which could force the US President to destroy the invaders with a nuclear strike.
Turning Point: Fall of Liberty, released in February 2008, is an alternate history first person shooter where Winston Churchill died in 1931 from being hit by a taxi cab. Because of this, Great Britain lacks the charismatic leader needed to keep the country together and Nazi Germany successfully conquers Great Britain via Operation Sealion. Germany later conquers the rest of Europe and North Africa while mass-producing their wunderwaffe. The Axis launch a surprise invasion of an isolationist United States in 1953, which forces the country to surrender and submit to a puppet government. The game's main character is a member of a resistance force against the Germans.
Another alternate history game involving Nazis is War Front: Turning Point in which Adolf Hitler died during the early days of World War II and thus, a much more effective leadership rose to power. Under the command of a new Führer (who is referred to as "Chancellor", and his real name is never revealed), Operation Sealion succeeds and the Nazis successfully conquer Britain, sparking a cold war between the Allied Powers and Germany.
Another example of alternate history is the Resistance series of first-person shooter games. The point of divergence is in the years following World War I, where an isolationist Russian Empire - and later, Western Europe - is conquered by an alien race called the Chimera. The aliens later invade the United States.
The Fallout Series of computer role-playing games is set in a divergent America, where history after World War II diverges from the real world to follow a retro-futuristic timeline. For example, fusion power was invented quite soon after the end of the war, but the transistor was either delayed or never was developed. The result was a future that has a 1950s 'World of Tomorrow' feel to it, with extremely high technology such as artificial intelligence implemented with thermionic valves and other technologies now considered obsolete.
Iron Storm is a first person shooter set in 1964, where the Great War still continues and international corporations sell stocks as if "betting" on an outcome. Since profits are so great, they continually press for stalemate to keep the conflict in an ongoing cycle of minor advances and losses.
"In the action adventure game inFamous, the main villain of the first game, Kessler, is the main character Cole's future self. He (Kessler) failed to save the world from the Beast (the main villain of the second game) and traveled back in time to insure his past self not to make his grave mistake.
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Alternate history has also appeared in comic books. An early example is Captain Confederacy, which is set in a world where the Confederate States of America won its independence and has created a Captain America-type superhero for propaganda purposes.
Influential comic writers have also used an alternate history as the background to their story. Alan Moore's 1986 comic series Watchmen is set in an alternate United States that not only has costumed adventurers as commonplace fixtures within American society, but also contains other alternate history elements including an American "victory" in the Vietnam War and Richard Nixon serving five terms as president. Warren Ellis's 2001 comic mini-series Ministry of Space features a British space program that had its foundation in the United Kingdom's recovery of scientists and technology at the German rocket installations in Peenemünde ahead of the US Army and the Soviets.
Marvel and DC have their own titles where they can tell alternative stories based on their own characters (What If...? and Elseworlds, respectively). Most set the stories in different times or base them on different genres with some based on a divergence in their fictional history, such as the Age of Apocalypse, where Professor X being killed accidentally in the past led to Apocalypse taking over America.
The time travelling Marvel Comics villain Kang the Conqueror has created alternate realities and different versions of himself due to his time travelling. However after stumbling into Limbo he succeeds in eliminating all the other versions of himself. Later his Future counterpart Immortus becomes an alternate version of himself.
However, some are genuine alternate histories, with Batman: Holy Terror based on the premise that Oliver Cromwell lived for another decade. Some of the newer DC Multiverse alternate Earths could be legitimately described as alternate histories. On Earth-9, the emergence of metahumans led to a limited nuclear exchange ("the Cuban War") in 1962, leading to the destruction of Florida and Cuba, US intervention during the Soviet invasion of Czechoslovakia in 1967 and the survival of the USSR into the nineties (see Tangent Comics.). On Earth-10, Nazi Germany won the Second World War. On Earth-17, the United States and USSR fought a thermonuclear World War III in 1986, with some human survivors. On Earth-30, the Soviet Union won the Cold War due to the technological boost provided by Superman, whose vehicle landed in the Ukraine, instead of Kansas (see Superman: Red Son).
In 2009, Bryan Talbot created Grandville, a graphic novel set in a world mostly populated by anthropomorphic animals, in which France won the Napoleonic Wars, invaded Britain and guillotined the British Royal Family. Grandville also features elements of steampunk.
In 1978, "The Sentinels", one of the first serials in UK girls' comic Misty, featured an alternate world where Nazi Germany conquered Britain in 1940. The alternate world was connected with the mainstream world via two apartment blocks called "The Sentinels". People kept stumbling in from both sides, causing terror over unexplained disappearances and worse, mix-ups over parallel world doubles. This culminated in the Gestapo mistakenly arresting a man from the mainstream world and people from both worlds uniting for the rescue mission.
Fans of alternate history have made use of the internet from a very early point to showcase their own works and provide useful tools for those fans searching for anything alternate history, first in mailing lists and usenet groups, later in web databases and forums.
The "Usenet Alternate History List" was first posted on April 11, 1991, to the usenet newsgroup rec.arts.sf-lovers. In May 1995, the dedicated newsgroup soc.history.what-if was created for showcasing and discussing alternate histories; it expanded rapidly and at its peak in the early 2000s regularly had over 10,000 posts a month. Its prominence declined with the general migration from unmoderated usenet to moderated web forums, most prominently AlternateHistory.com, today the self-described "largest gathering of alternate history fans on the internet".
In addition to these discussion forums, in 1997 after the creation of the world wide web, Uchronia: The Alternate History List was created as an online repository, now containing over 2900 alternate history novels, stories, essays and other printed material, in several different languages. Uchronia was selected as the Sci Fi Channel's "Sci Fi Site of the Week" twice.
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