It's like some sort of plague, and half the city's got it. Batman:
Yes, the male
A Depopulation Bomb
variant that removes approximately half of the population of the world in one stroke, namely one complete gender. In many stories, there is one survivor of the lost gender — the protagonist, love interest, or MacGuffin
of the story.
If it is the males who die off (as is most frequently the case
), the story will be about how the surviving women rebuild society, or how Fish out of Water
males cope with a society that has already been rebuilt. If it is the latter, the Last Man on Earth, our protagonist, may initially think that his life is going to be all orgies and pampering from now on. This is classic Genre Blindness
, as stories of this type almost never fit this pattern. The last man will quickly become a target, sought by every woman of power and means in the world, as his sperm may be the key to the survival of the human race.
This type of story exists for several reasons. Primarily it's to explore gender politics and behavior, but they also have the secondary benefit of providing an excuse to write literature in which most of the principal characters are female (a major change from a lot of fiction
). In addition, classic gender roles, the glass ceiling and biology being what they are, the death of all men would effectively decapitate most of the world's organizational structure, meaning descent into chaos is likely, especially in stories set before 1970. This collapse (and probable renewal) of society provides an excellent source of conflict for writers to build their plot around. Finally there's Rule 34
: being one of the few males alive (fertile or not) gives our protagonist the chance to seduce every woman he sees
, which is a popular trope on the horny side of the Web
Some hard-line feminist
authors might create this kind of story as a utopian vision
, in line with their view that men are the root cause of all the ills of society
. Some anti
-feminist authors might create exactly the same kind of story to produce a dystopia, to show that feminists
are the cause of all the ills of society. Still others take the stance that humans
are the cause of most human problems, and that if men aren't calling the shots, women will still make the same short-sighted and foolish decisions (at best, all new
short-sighted and foolish decisions). The total collapse of society in these cases is not because of some inherent flaw in female leadership, but because three-and-a-half billion people just died all at once, with all the problems that causes. Either way, the dirty secret of these stories is that they're usually there to impart some political message
, sometimes subtle and unobjectionable, sometimes not
When all the women die off, the story is usually less about politics or gender issues and more about The End of the World as We Know It
. These stories almost always take place After the End
, in either a cruel dystopia
or a chaotic Scavenger World
. Either way, the clear implication is usually that without the "calming presence
" of women, the men will immediately nuke themselves to hell out of sexual frustration
and other "manly" demands
. Such a setting is of course highly prone to feature brutal male-on-male rape
to add to the Nightmare Fuel
, or for other reasons
. Note this can happen with the women-left scenario, but much less often and with the rape part nonexistent. The sexist nature of the situation is more complicated still if the men are "fighting over" the remaining women (in which case, there's at least a reason
It is worth mentioning that a society with a lone survivor of one gender (or a pool smaller than a couple hundred of each) would be doomed to extinction. There's wouldn't be the genetic diversity required to survive for more than a handful of generations (and that's once you get over the Squick
factor of having to know exactly
how related you are before you reproduce). Scenarios that result in a single gender and try to introduce some form of "human parthenogenesis" would succumb to extinction even faster without some kind of applied phlebotinum
The name is a pun on genocide, and was first used by Mary Anne Warren in her 1985 book
, Gendercide: The Implications of Sex Selection
See also Gender Rarity Value
and Childless Dystopia
, both of which this trope is a prime setup for. If all
of the members of a gender dies off, you may result in a One-Gender Race
. Compare Sterility Plague
, which can enable similar kinds of plots.
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Anime & Manga
- In the anime Girls Bravo, the alternate dimension of Seiren has a 10/1 female/male ratio. The main character, milquetoast gynophobe Yukinari, gets propositioned by a couple of grade school girls and chased by virtually the entire female population of a city that has very few, or possibly no, men in it before he escapes back to Earth. The Big Bad Yukina Does Not Like Men so much that she wants to eliminate the few men that are left.
- The So Bad, It's Good anime OVA ICE takes place In a World where all men died after the space station Mir unexpectedly crashed into the ocean while still carrying experimental toxic substances. Yuri ensues, obviously.
- In the hentai manga St. Margareta Academy, "chromosome abnormalities" have caused a 25-to-1 female/male ratio; as a result, statistics show that 90% of all women will be deemed "useless to society", and are federally forced to enroll in a special school training sex slaves through S&M classes for nine years, for the purposes of "social services". Extremely disturbing (to put it mildly) BDSM ensues.
- Vandread seems to be something like this early on. In this show's take, the all-male planet develops into a paranoid fascist dictatorship, while the all-female planet is a constitutional democracy. However it shows the men of their planet having few resources surviving in a harsh unforgiving world but use what they have sparingly and are not afraid to depend on each other, where as the women inhabit a planet rich in resources but are morally and socially deficient, constantly trying to one up each other and waste the resources they have aplenty frivolously.
- Yokohama Kaidashi Kikou does this with the relationship between male and female androids.
- The manga Ooku: the Inner Chambers begins with a disease that kills off a large proportion of the male population of Japan during the Edo period. Subsequently, males continue to die of the disease while women take over almost all productive roles in society, including the shogunate. Only the female shogun is wealthy enough to keep a harem (the titular ooku) full of non-productive, pampered men in her care and, like its real-world female historical equivalent, the male harem lives a strictly cloistered life.
- An alien example in the backstory of the Arume of Blue Drop. Once again it's the men who died out. The women solved things by giving themselves some male genes so that women could reproduce using machines to facilitate the process; it was only a stopgap measure and wouldn't keep them going forever. They made a smashing attempt to go get the last male Arume genes from human males on Earth (there were apparently some Ancient Astronauts a while back who got... busy). They chickened out in the end, though, having become too used to the new status quo, and took our women instead.
- The Yuri Hime serial, Love DNA XX involves humanity contracting an epidemic that causes no males to be born. After the last man dies off, the governments start enforcing a rigid new gender system on the leftover females splitting them into "Adams" and "Eves". Though to be precise, it's not so much a new gender system as the same old one but more arbitrarily assigned.
- One of the fictional comics of Bakuman。 goes downhill when it has a Gendercide plotline.
- It's only seen in the titles of the soundtrack songs, but this was apparently done to men after a sex-based civil war/armed rebellion in the backstory of Simoun:
The Woman-Nation, First Movement: Ancient Mankind (Track 3)
The Woman-Nation, Second Movement: Collapse and Eradication of Male-Dominated Civilisation (Track 4)
The Woman-Nation, Third Movement: Engineering and Preservation of a New Species (Track 5) The Woman-Nation, Fourth Movement: Founding of the Woman-Nation (Track 6)
-Simoun OST 1
- A modified version appears in Macross: Do You Remember Love: the Zentradi and Meltrandi (men and women of the same race, respectively) are actively trying to kill each other to such an extent that seeing the two genders peacefully coexisting on the Macross weirds the hell out of them.
- Aquarion Evol: Altair, once a planet with a functional race of two-gender Human Aliens, experiences a sudden case of this trope when the female birth rate plummeted, then the rest of the female population died out due to a mysterious disease, virtually turning Altair into a Childless Dystopia with Jin Muso, one of the main antagonists, as the Last of His Kind. To remedy this Altair started scouting other dimensions for "Reaiglers", females who are potential candidates to become "Eve", mother of a new generation of Altairians.
- In Sky Girls 90% of the world's male population between ages 20-30 was killed in the war with the WORMS, hence the scantily-clad teenage girls piloting Mini-Mecha.
- It's said in Yu-Gi-Oh! 5Ds that only Z-one, Antinomy, Paradox and Aporia are the only survivors in the future where the Machine Emporers has killed the human race. All four of them are male.
- It's lampshaded by Paradox in the abridged Yu-Gi-Oh! 3D - Bonds Beyond Time movie.
Paradox: "In the future, the world as we know it has been destroyed. Humanity's ignorance has caused the planet to become.....wavaged and wifeless."
Yami Yugi: "Wavaged and wifeless?"
- The entire premise of Y:The Last Man. A Comic Within The Comic, made by a female survivor, tells the gender-reversed version.
- The DC Elseworld story Created Equal is one of these, with Superman as the last man. Halfway through the story it's revealed that Lex Luthor survived too.
- The adult comic Naked Earth.
- In Enki Bilal's Nikopol Trilogy, Paris is introduced as a facist city-state where the Depraved Homosexual elite uses eugenics to minimize the percentage of females in their population, and keeps them out of sight in underground breeding farms. The eponymous protagonist, Alcide Nikopol, puts an end to the practice while turning the city-state to communism with the aid of the rebellious Egyptian god Horus. It's a surreal comic.
- XXXenophile had one story where a naked male time traveler shows up in a woman's closet. He's from a future where all women have been wiped out and men reproduce by cloning. One side effect of the gendercide is that they got rid of all wars, starvation and diseases, and generally built an utopia, but now they've began to wonder if those "women" weren't good for something after all and maybe they should be brought back, so he's sent through time to conduct research. Thus, much acrobatic research is had, after which he concludes that women are a very good thing to have after all. Turns out they're actually a normal couple roleplaying.
- The Guardians of the Universe in the DC Green Lantern series were a one-gender (male) race. The Zamarons, a one-gender female race, were later revealed/retconned as the females of the Guardians' species. Homo guardiensis is, apparently, fairly sexually dimorphic: Guardians are short, pale blue, and physically weak, Zamarons are tall, (usually) dark blue/indigo/violet, and athletic. The split didn't happen because of a bomb, but because the sexes just got tired of putting up with each other (their species is very long-lived and they didn't need to reproduce often). In later issues we see female Guardians who look much like the males, so it's been Re-Ret Conned back to two different species.
- Played with in the Luna Brothers' series Girls. The titular aliens start out seeming to express this as they attack every human woman they see. Later on, however, they attack men who cannot or refuse to have sex with them, and the townspeople figure out they're only interested in human males for reproduction, not sex. At the same time, the confusion and fear created by them and the barrier that appears around the town results in the women and men separating into mutually hostile camps.
- In the Girls und Panzer fanfic, The Gender War, the ultimate goal of the Union of Feminist Progressive Republics, also known as the Femintern (the members of which are called "Feminists") is the complete and utter eradication of men. About 40 to 70 million people die in the conflict, and Germany, one of the Femintern members, ends up having to use measures such as polygamy to regain a stable population growth.
- In Joanna Russ' short story "When It Changed", a planet is colonized by Earth, but all the men die. In a twist, the women don't do a super better job at running things, though they are able to live fairly well on the planet. Unfortunately, men from Earth come and imply they will force the women to mate with them if the women refuse to do so willingly. As the women are all now lesbians (and have invented a way to have children), this does not bode well for them. Arguably anvilicious, but sf in the early 1970s still had some gender issues.
- Margaret Atwood's The Handmaid's Tale plays with a variant of this, in which 95% of all women were rendered sterile by a plague. This leads—in America at least—to a rigid theocracy which virtually enslaves the few remaining fertile women. The men are also frequently sterile but the theocracy insists that failure to produce children is the fault of women. This leads to handmaids trying to secretly conceive children by fertile men to prevent themselves being declared barren and sent to the work camps.
- In A Brother's Price, people are not so much sterile as mostly unable to produce male offspring. This results in a world where there is about one boy born for every ten girls. It is never mentioned what lead to this, but it could be a post-apocalyptic setting, with environmental pollution being the cause of frequent stillbirth of male babies. Society adapted to this, and the setting is quite cosy by postapocalyptic standards. There is, however, literal gendercide mentioned in an offhand comment about a family who has thirty daughters (born by ten mothers or so, but only one husband), and only one son, with someone saying that they would probably "litter the land with the dead bodies of female babies if they thought they could get away with it", as it is suspected they keep having babies in the hope for a second son.
- The feminist novel Herland, by Charlotte Perkins Gilman: The men of a tribe all kill themselves in a war, leaving the women to randomly develop the ability to reproduce parthenogenically and found a utopia.
- In Frank Herbert's novel, The White Plague, a molecular biologist driven mad by the death of his wife creates a virus that targets women.
- Joanna Russ's The Female Man features a man-less world as the home of one of the principal characters. It is unabashedly utopian, and though it's stated it's the result of a plague that wiped out men in the distant past, there's one or two hints it might instead be the result of one of the other alternate worlds, where men and women are at war with each other. Russ was anything but subtle about how
she felt women were held down by men. One of the longest, most detailed passages concerns a woman warrior from the latter world literally tearing a man apart with her bare hands, which may have been Russ working out some frustrations.
- The Rainbow Cadenza is a libertarian sci-fi novel by J. Neil Schulman where men outnumber women seven to one, and all women are drafted into prostitution for three years. This happened due to a number of long wars in which more men were created (via chemicals which affected the gender of the sperm) than women.
- Alice Bradley Sheldon/James Tiptree Jr.:
- The novella "Houston, Houston, Do You Read?" is about a group of male astronauts on a circumsolar mission who run into trouble and are trying to contact Houston to return to Earth. They get picked up by a ship crewed only by women, and spend a good deal of time asking where all the people (meaning the men) are. Turns out, their ship had slipped through time several hundred years and in fact a plague had wiped out all men and most of the women on Earth, leaving only 11,000 survivors. The world the guys returned to had no crime or war but also no advancement.
- The short story 'The Screwfly Solution' (also made into a Masters of Horror episode) has a rather disturbing version of this trope. Aliens distribute a virus that causes human mating behavior to change, turning men's sexual impulses into violent ones, essentially turning them all into psychopathic serial killers bent on destroying all women (and occasionally little boys). Once they have accomplished this, the aliens simply have to wait for all the surviving men to die before they move in and take over the earth. The story's title is based on a real-life method for eradicating Screwfly, which uses a hormone that subverts the fly's mating instinct so that the males mount the females in the wrong way, so no conception can occur. So, Truth in Television?
- John Wyndham's novella "Consider Her Ways" features a world in which men have been killed off by a virus, where women have discovered a way to reproduce without them, but this involves a whole caste of women whose sole duty is to squeeze out daughter after daughter for the rest of their lives all the while being fattened up for the child's health (several years ago it was believed a woman needed to put on a lot of weight to ensure a healthy birth, rather than the opposite we know today). The protagonist is a woman from our world who "travels" there while under the influence of an hallucinogenic drug and finds herself in the body of one of these birthers. It was All Just a Dream — Or Was It a Dream??
- In one of Cordwainer Smith's stories about the Instrumentality of Mankind, "The Crime and the Glory of Commander Suzdal", the settlers an isolated planet nearly lose all the women to a virus or mutation which "turned femininity carcinogenic". A few surviving women actually turn themselves into men through massive testosterone injections and manage reproduction through embryonic implantation. Over the centuries their memories of womanhood and eventually the Earth itself are twisted into monstrous hatred. Then Commander Suzdal shows up in his scout ship...
- Chaos Walking: In The Knife Of Never Letting Go, the protagonist Todd Hewitt grew up on an alien planet, in a town where there are no women. For his whole life, he believed that the reason was a Depopulation Bomb, which killed off all the women and had the side effect of allowing everyone to hear the men's thoughts. The truth is much more sinister. The thought-hearing is a natural effect of living on the planet, and the men in Todd's town couldn't stand that the women could hear their thoughts but not the other way around, and killed them all. There are women in other towns, but Todd has never met one.
- In The Queen of The Damned the titular vampire attempts this with males. By her own power. Or worse. A bunch of boys and girls who are just entering puberty, and no adult supervision? And yes, that was the official reason for the lack of girls.
- Robert Merle's novel The Virility Factor, where a virus kills most men capable of reproduction, and a misandrist regime comes to power in the United States. When the cure for the disease is discovered, it falls, and the society starts treating the remaining men as sex objects.
- In David Brin's Glory Season, a space ship of feminist colonists goes to a far, far away planet in order to create a perfect society. The women are in charge, and whenever one of them finds their 'niche' in society, they clone themselves over and over. There are men left alive, because the scientists knew that if their society was completely stagnant, eventually something would kill them. So, there's the clone children, or "winter children" who are the majority of the population, and then "summer children" who are born when men who have proven themselves useful get to vent their genetically suppressed lusts during the summer. The summer children are also called "variants", and the protaganists goal through the book is to find her 'niche' and be allowed to have a clone child.
- In Honor Harrington, the planet Grayson has a fairly mild, albeit long-lived, form. Some desperate genetic engineering to save the colonists from a Death World in the backstory results in roughly 2/3 of males being miscarried. This state of affairs continues for almost a millennium, until they get access to advanced enough technology to figure out what happened and reverse it. It's a lot less destructive than most other examples, however - they pretty quickly adopt polygamy and move on with life.
- In John Varley's Gaea Trilogy, the moon is bought out by a group of women called The Coven, who detest men. They're all lesbians, but they reproduce by ordering sperm shipments from earth.
- David Patenaude's Eternity Road centered on a virus called Elisha's Bear, that wiped out most of the men in the world. It's revealed that it was intentionally released by an angry radical feminist.
- R.A. Lafferty's short story "Parthen" is set during a Gendercide, in which asexually-reproducing aliens who resemble pretty young women mingle with the human population, causing every man who sees them to fall chastely in love with them. This induced a form of Love Makes You Stupid, so the infatuated men quit working, abandon their families, and eventually perish in the streets. Human women clean up the bodies and replace men in the workforce, while the alien "girls" buy up property when the male owners desert it. A transmission from space had previously warned the Earth that aliens would destroy half of humanity and enslave the other half, yet even as they're starving to death, the male protagonists keep assuming it'll be a violent invasion rather than a Gendercide.
- In The Brides of Rollrock Island by Margo Lanagan, there is a variant of this. The witch Misskaella has made it possible for the men of Rollrock Island to marry seals transformed into beautiful women, or "sea-wives", instead of normal human women. The sea-wives are incredibly beautiful and considered superior to human women, since they basically do everything a man says. The families of the island actually begin killing girl babies, so that the sea-wives have no competition. This results in a cycle of men never seeing a woman until it's time for them to marry, at which time they get Misskaella to make them a sea-wife.
- Legacy of the Dragokin: This is the goal of the Kthonian Knights; exterminate men because they're all bastards. There is very little in the way of political messages as, in practice, they are indescriminate in who they kill and who they turn into a monster with The Virus. Also when Daniar convinces Kthonia that women are just as morally flawed as men, the latter decides to kill them both.
- In Andre Norton's Ordeal In Otherwhere, the white death had killed men and adolescent boys except for a handful — the most religious families and those with the least trust for the government, which they interpret as judgment. It does mean they want to buy slaves from a Free Trader to do agricultural labor, since they destroyed machinery as a response to the plague.
All of which is a set up to ensure that the now orphaned Charis is sold to the Free Trader to buy some of those slaves in the first chapter. Nothing more about the colony is said in the book.
- The Kreelans in In Her Name appear to be all female, this being one of many things huamn scientists just can't understand about them since, despite being aliens, they appear to be essentially mammals in most ways. It's later revealed (to the reader, not most of humanity in the story) that the entire species was cursed by the First Empress when an attempted coup resulted in the apparent death of her husband. Males, previously equals to the females, became non-sentient, greatly weakened animals who only live long enough to breed once and then die. Females were mostly rendered sterile, with the fertile ones being forced to breed every cycle (a Kreelan year, equivalent to several human years) or die horribly.
- Dying of the Light: It's theorized (and nothing is shown to contradict it) that this happened to High Kavalaan a long time ago, having massive effects on Kavalar society. The grieving widowers started to join into pairings called teyns, while women eventually came community breeders, kept in the securest parts of caves to avoid the plague. After a few generations, it congealed into a rather misogynistic society.
- In an episode of Sliders, the group arrived on a world where an engineered virus wiped out most of the male population (as Arturo points out, statistically there will always be a small segment of the target group which will be naturally immune). The survivors are kept in isolation at a secure sperm-bank facility. Australia had become a world power due to its isolation and distance from the initial release area limiting the effect of the virus on its population.
- The Masters of Horror episode "The Screwfly Solution" involves an epidemic of male-on-female violence that results in the elimination of all women from the face of the Earth.
- Occurred in an episode of Blake's 7, where a group of women were trying to exterminate all men. Avon summed it up nicely: "It's a problem, isn't it? You can have war between races, war between cultures, war between planets. But once you have war between the sexes, you eventually run out of people."
- Happened in "Lithia", an episode of the The Outer Limits (1995), where the few surviving men were Human Popsicles. The thawed soldier protagonist proceeded to raise merry hell in the all-female society that sprang up, but it was prevented from being an Anvilicious misandrist Take That by the fact that, as ham-fisted and ill-advised as the man's attempts to change it were, the new society was utopian only in appearance (i.e. what with the leadership's rampant favoritism in resource allotment and Big Brother-esque control on the information flow). It ended with him being "put down" (refrozen) and the leadership declaring that trying to make men return was ill-advised, and that all efforts to do so would be ceased which is implied was the real reason they thawed him (and the others before him)- they wanted the least suitable test candidates in the most potentially disruptive situation possible to give themselves plausible deniability why they stopped as well as "proof" that men were the cause of all of society's previous ills, most probably to maintain their power. Just to twist the knife further, the old woman who put him down was his wife, several decades older, and thoroughly convinced of man's evils by a mix of propaganda, his own actions and probably a lifetime of accumulated resentment over numerous issues.
- In the Doctor Who episode "The Vampires of Venice", the Saturnynians had their home planet destroyed by the Cracks. Only the males survived the journey to Earth. They tried to survive by turning human women into their own species, but the Doctor intervened. The matriarch gives him a What the Hell, Hero? before committing suicide. Fortunately, the Doctor later pulls a Reset Button on reality, meaning the Cracks never existed and the Gendercide of the Saturnynians never happened.
- "Cemetery Girls" by Schoolyard Heroes is about a Gendercide in which all males die.
- In "Extermination Day", by the NWOBHM band Angel Witch, a superior race of female aliens invades Earth and eliminates the male gender as punishment for violations of human rights.
- There was a hit rockabilly song in the 1950s entitled "Thirteen Women and Only One Man in Town"; it experienced a resurgence in popularity in the mid-1990s. What many people did not know, either then or now, was that the song alluded to the only fourteen people left on Earth following a nuclear holocaust. Lucky guy....
- At least in the revival version ("Big Bad Voodoo Daddy"), it's pretty explicit in the opening lyrics: "Last night I was dreamin'/Dreamed about the H-Bomb"
- The original Greek depiction of the very human Amazon civilization variably implied they replenished their numbers the way most warrior cultures did, from invading villages. And depending on how charitable the writer was, any male children were either returned to be reared in those villages, or killed.
- In the story of the Argonauts, Aphrodite curses the women of Lemnos with a terrible odor for neglecting her worship. The odor drives their husbands away and into the arms of concubines. As revenge, the women invoke this trope.
- Angels 2200: The entire background of the comic is based on a mysterious genetic plague that runs rampant and kills off nearly all human males, leaving the women to pick up the pieces (including an interstellar war with the unruly colonies). Leading to an almost entirely Amazon Brigade cast with occationally fanservicey and/or stripperiffic outfits.
- The first story arc of The Dragon Doctors has them investigating a valley where men can't exist—if any go in there, they become permanently female, so the population of the valley is effectively suffering from this trope despite nobody technically dying.
- One DnD story posted on /tg/ featured a sociopathic, misandrist tiefling bard swaying an elven queen into almost doing this. Before being killed by the party's (male) barbarian and (female) fighter.
- The Flash-animated series Gotham Girls had a large section of episodes where all men in the city simply vanished and ceased to exist due to some sort of strange mad science. Very fortunately, they were all brought back unharmed by the device as well. There are a few interesting implications of this; the police force loses the majority of its members due to cops being male-dominated, but the violent criminals were even more male-dominated, so there are less people for them to police. There's also a sub-plot about a missing female detective—turns out, she was secretly a transsexual and also vanished with the rest of the men.
- Ember and her cronies succeed in doing this to all the males in Danny Phantom, because one of them was dumped by her boyfriend. They got better.
- In the Justice League episode "Fury", an Amazon with a serious bent against the male gender decides to release a disease into the atmosphere that nearly kills off all of the men on the planet. This includes the male members of the Justice League (even Superman and the Martian Manhunter are affected, despite not being human, and Solomon Grundy, who is The Undead. It's implied magic is involved). It's up to Wonder Woman and Hawkgirl to save the day (of course, this includes fighting against an all-female alliance of villains).
- Codename: Kids Next Door has a variant where a female villain develops a way to turn boys into girls and launches a war between the genders. This combined with her tyrannical rule creates a Bad Future where only a few boys remain, led by an aged Numbuh 4. Numbuh 3's Identical Granddaughter winds up teaming up with the boys to prevent it all via Time Travel. One actually does have to wonder how exactly the villain got to her age (she's very old) without finding out that her actions would cause humanity's extinction without men, though it's a children's cartoon so the writers can be forgiven.
- The weapon does also affect girls, primarily tomboys (Numbuh 5 becomes ultra-girly in the Bad Future timeline).
- Older Than Dirt: already pre-Biblical sources insist that in the human history it has been customary for a conqueror to kill all adult males, castrate all young boys and take all women as sex slaves. Men are expendable.
- The Wolbachia bacteria is inside 40-70% of insects and can't be transmitted by bug sperm. So it kills males in their eggs. If a little male critter survives, the bacteria tries to transform it into a female.
- Some good news for male bugs everywhere. The Blue Moon Butterfly has evolved a resistance to the bacteria and went from males being 10% of the population to 40%. They did it in a year, which is 10 butterfly generations. Start your mutating, males! Survive! Survive!!!
- Paraguay, after the War of the Triple Alliance. Five years of nonstop war against Argentina, Brazil and Uruguay left about 50% of the prewar population and nearly 90% of the prewar male population dead. The word was that there was no male paraguayan alive over the age of 12.
- Female fetuses are often aborted in some regions of China and northern India, depending on local culture. Where this is impossible, such as in some of China's rural regions, baby girls are sometimes simply murdered as soon as they are born. There are laws against this on the books, but they are either not enforced very rigidly or ineffective at curbing this. The cause is social mores that make male children more valuable — "girl babies don't count." The Economist magazine wrote that "it is no exaggeration to call this gendercide", adding that the number of women "missing" in this way is well over a hundred million. This has led to increasing criminalization of selective abortion of females, including banning the use of ultrasound for non-medical reasons, but the laws have had limited effect because it's hard to prove the doctor informed a couple of a child's gender. Yin Yin Nwe, Unicef's representative to China, refers the fact that the one-child policy brings many benefits for girls, "but they have to be born first."
- This results in a social problem for men too: it means that there is a perpetual drought of females for spouses. And unfortunately, this problem is "solved" by trafficking women from other countries who are forced into marriage to these men.
- Infanticide has a long history in the regions. Back before birth control - i.e., before the twentieth century - one dealt with unwanted children in one of two ways: abortion, which was common virtually worldwide, and getting rid of the baby when it was born. In Europe and its offshoots, this took the form of giving your baby to an orphanage or a guild, or simply to leave them someplace that someone might pick them up. Whether the child lived or died - and at least nine out of ten babies abandoned in this way did die - was irrelevant, because their parents had not, technically, committed infanticide. In the (Indian) Subcontinent and East Asia, they gave them (honourable) death. Of course, there's many a case of parents throughout Eurasia meaning to dispose of their unwanted child, only to find they just can't do it; related to this, there are countless cases of the adoption of unwanted babies by those unable to have (more) children themselves.
- World War One saw the deaths of ten million soldiers — all of them male — and six million civilians. Given equal distribution of civilian casualties by gender, that's over four men killed for every woman. When Europe tried to pick up the pieces after the war was over, they were faced with a plethora of women and a dearth of men.
- WW1's overwhelmingly male casualty rate had knock-on effects for WW2: the onset of the second war ~20 years after the end of the first was in part due to the combatant nations needing a generation of young men to reach military service age to repopulate their armies. France, which of the major WW1 powers had the highest casualties as percent of population (over 4%)note , recovered very poorly. Its standing army and conscription pool had a high average age and low mobilization speed, which contributed to the rapid fall of France in 1940.
- This is why the Spinster is such a prominent fixture in mid-20th C. popular fiction, especially in Britain.
- By contrast, World War II killed approximately sixty million people. Twenty-five million were soldiers (overwhelmingly male, although not entirely so this time aroundnote ), while around thirty-five million were civilians. Again, given equal male and female civilian deaths, that means a little over two men dead per woman.
- In many farms, due to the lack of use of male chickens (who don't produce the meat and eggs that hens do), almost all male chicks are killed when born, be warned, many undercover videos depict graphic depictions of the chicks being slaughtered.
- Some species of whiptail lizard have experienced this. We don't know the exact cause, but these species experienced a reduction in the genetic material on the male chromosome over time, until there were no more males of these kinds of lizards. They adapted though; these species consist entirely of females, and each one lays eggs that are an exact clone of her. To stimulate egg-laying, though, they still have to mate, and this is done by finding another female. The larger dominant female of a given pairing lays more and larger eggs.