* WhatMeasureIsANonHuman/DCAnimatedUniverse

* Depending on the author, Franchise/{{Batman}} varies greatly in this regard. However, he is shown many times to consider all sentient life sacred. An example would be where he believes he accidentally killed Judge Death in the ''Batman''-''ComicBook/JudgeDredd'' {{Crossover}}, despite Death being an undead killing machine that just killed three people in front of him.
--->'''Batman:''' I didn't mean to kill him! \\
'''Random police officer:''' It was a monster! It just killed (policeman's name)! \\
'''Batman:''' That doesn't mean I had the right to take its life!
** Not that this mattered; turns out it takes more than being impaled to kill Death anyway.
** Batman's no killing clause varies depending on the author. He has no problem killing undead in the above-mentioned ''Batman Vs Dracula'', and in ''Batman/Aliens'' he goes ahead and jams a Bat-grenade down a Xenomorph's throat.
* In a late-1990's Elseworld-type story, Batman teams with Tarzan, and finds his new ally has no problem casually tossing a mook off a cliff. When Tarzan risks his life (and the mission) to save a lion, Bats reads him the riot act. Tarzan's response: "The man was my enemy - the animal is my friend."
* Speaking of ''ComicBook/JudgeDredd'', their twist on the matter involved an alien shapeshifter escaping to the Big Meg to get out of slavery. Dredd, who wants to arrest the shapeshifter for murder, is partnered with an alien administrator who wants to return it to its owners. The shapeshifter is finally left with the decision to either stay in Megacity One, where he counts as a sentient being and is therefore subject to the city's comically strict justice and faces a long prison term, or return to Alientown, where, legally counting as property, he can not be held culpable for his actions, but will remain a slave.
** Also in Dredd, robots are sentient and ''exactly'' like humans, but are still a slave race and abused. Dredd himself is responsible for destroying a robot revolution and sending everyone ''back'' to slavery. (Usually the writing is on the side of the robots, as is reader sympathy) Dredd himself is a robot-rights supported, the robot leading the revolution was clearly evil.
* Probably the most interesting exploration of the zombie issue is the web-turned-actual comic ''ComicBook/DeadEyesOpen'' where people start coming back to life as zombies -- but retain ''all'' of their memories and personality. They don't even start eating human flesh. The ramifications of intelligent living dead are the focus for the rest of the story.
* In ''ComicBook/{{Runaways}}'', during the ''Comicbook/CivilWar'' {{Crossover}}, the [[CapeBusters Cape Killer unit]] is shown to actively rate an enemy's worth based on [[SlaveToPR how much the news-viewing public might object]]. Minors are treated with non-lethal force, adult humans with moderate force, and with artificial beings like [[spoiler:Victor]], it is permissible to use full lethal force. Aliens have no legal standing in the US and do not generate any sympathy from news-viewing audiences, so it is considered the same as hunting an animal.
** In another story, Darkhawk said: "You're not made of flesh, [[{{Robot}} Ultron]], which means I don't have to play nice."
* The [[SelfDemonstrating/{{Bizarro}} Bizarros]] in SilverAge Franchise/{{Superman}} stories were another example. Made of "non-living matter", having them killed off was often a source for comedy; they even made a meteor plunge into one of their cities and kill a lot of Bizarros, on the grounds that Bizarros do things backwards so they want to maximize casualties. This was played as a pure joke.
* Comicbook/GhostRider, at least in his 90s incarnation, did not kill even the most inhuman of humans, to the point where his apparent destruction of a ninja in one issue was retconned into that single particular ninja actually being a robot. However, he was quite happy to maim and slaughter demons and other AlwaysChaoticEvil beings, in one instance tying the photosensitive pseudovampire Blackout to the spire of the Empire State Building and letting him die a horrific burning death as the sun came up. Blackout didn't actually die and popped up on the Raft about fifteen years later, but Ghost Rider had no way of knowing that.
* Another classic Superman story from # 314 (back in 1977): Superman is faced with a dangerous alien Jevik, who he intends to destroy. When questioned about how he can kill when he has a [[ThouShaltNotKill code against killing]], he replies that Jevik is not really alive. When Jevik's heart begins to beat, Superman says that somehow he's come alive, and Superman can't kill him. Apparently for Superman, if you don't have a heartbeat he can do anything he wants to you; merely being able to walk, talk, and act on your own doesn't qualify.
** He made a few exceptions for drastically nonhuman things, like the EldritchAbomination Urko the Terrible; and when {{Brainiac}} underwent his first major upgrade (to his SkeleBot form) and became far more ruthless in killing innocents, Supes said he'd be willing to destroy him since he was JustAMachine. On the other hand, the readership revolted when Superboy destroyed the very first Bizarro, and so the character was recreated by AppliedPhlebotinum not long after.
** Interestingly, in the Post-Crisis backstory, this sort of thing was the reason for Krypton's cold and sterile world: at one time, Kryptonians grew clones of themselves to extend their lives and, pretty soon, people started to get uppity about it, going into a major war that would lead to the planet's ultimate destruction.
* On the other hand, the Comicbook/{{Legion of Super-Heroes}}'s [[ThouShaltNotKill official rule against killing]] extends to anything sentient, including [=AIs=].
** Maybe now it does, but historically that hasn't been the case; among other examples, they originally killed Brainy's malevolent AI creation, Computo, without a qualm, and in the next incarnation tried to do it again, although Superman was the one who struck the death blow that time. Then there was a later arc about an invading machine race which raised the issue of the rights of [=AIs=] in the Legion's society (namely, that they didn't have any); at the end the Legion's leader pointed out that they'd been killing the machines all through the storyline, and wondered if this was a violation of their code.
*** In one set of issues they actually published the Legion Constitution, which states that any Legionnaire who uses lethal force against a sapient being must be expelled, unless the act was in the final extremity of self-defence, or a provable only alternative to the deaths of other sapient beings. In the case of the original Computo story, his destruction was very definitely a "provable only alternative."
*** That's a later provision of the Constitution; at the time of the Computo story the Legion did not allow the use of lethal force under any circumstances, however justified...but no one blinked at using it on Computo.
* In ''ComicBook/TheSandman'', Richard Madoc justifies his abuse of Calliope to himself because she's not human; however, this is clearly portrayed as absolutely immoral.
* The ComicBook/RedTornado angsts over this constantly, and when the ''Franchise/JusticeLeagueOfAmerica'' needs a member to sacrifice himself, he's usually at the top of the list.
** In the 1980s, however, he was retconned to contain an alien EnergyBeing called the Tornado Champion.
* In ''ComicBook/{{Hellboy}}: Conqueror Worm'', Director Manning reveals to Hellboy that the BPRD upper brass decided to install a bomb in Roger the Homunculus, as a "fail-safe" to prevent Roger from endangering the lives of agents in the future; their explicit reasoning is that Roger is expendable because he's not human. When Manning gives Hellboy the detonator, HB is not pleased: "You know, '''I'm''' not human, either, remember? When are you guys gonna put a bomb on me?" Then, when an opportunity arises for Roger to kill [[EldritchAbomination the Worm]] by blowing himself up, he's [[MessianicArchetype perfectly willing to do so]], and it's Hellboy who insists they find another way. By the end, Director Manning comes around to HB's point of view, but Hellboy is so ticked by the entire incident (and a few other factors) that he quits the BPRD.
** The same story also contains the phrase,
---> To be ''other'' than human does not necessarily mean to be ''less''.
* Subverted in the original Fawcett and [[Franchise/TheDCU DC]] PreCrisis ComicBook/{{Shazam}} Captain Marvel stories. One of the odder characters is Mr. Talky Tawny, a [[TalkingAnimal talking tiger]] who is taught English and chooses to live with Humanity. He's well dressed and has excellent manners. Captain Marvel made sure that Mr. Tawny is treated as nothing less than a full citizen of the society he chooses to live in, which comes into play when Tawny is on trial for... mauling someone. (Incidentally, the current version of Mr. Tawny in the regular continuity is a magic stuffed toy brought to life, and the Jeff Smith version for DC's kids is a shapeshifter whose favorite form is a tiger.)
* In the reviled ''ComicBook/SupermanAtEarthsEnd'', Superman uses "you're just an android, '''''[[MemeticMutation I AM A MAN!!]]'''''" as justification when he ''punches Ben Boxer's guts out''. There are ''many'' things wrong with this, least among them the fact that Ben Boxer is about as close to human as you can be, with emotions, a personality, and ''brothers''. Oh, and ''intestines''. This guy has ''relatives'' and can ''poop'', man, that doesn't sound all that inhuman to me. Superman then condescends to him further, claiming that Ben is "only doing what your creators programmed you to do"... even though Ben actually has free will and makes his own decisions.
** He has no centralized circulatory system active (see above)?
* The Comicbook/XMen have issues with this. Most of them are reluctant to kill (with Wolverine the most obvious exception), but will if they think it's the only solution. After they met the Brood, a AlwaysChaoticEvil alien race with a [[FaceFullOfAlienWingWong rather unpleasant reproductive cycle]], they rapidly modified their policy.
** Jubilee was a particularly extreme example. Normally she's so firmly opposed to killing that she once abandoned an escape attempt -- effectively giving herself up for another round of torture -- in order to perform CPR on a random mook she had injured. Then during Marvel's SecretInvasion crossover, she was killing Skrulls without even blinking.
*** It was pointed out in ''ComicBook/NewWarriors'' by that Jubilee's personality had radically shifted. Never got around to ''why'' before that one ended though.
* Speaking of Skrulls in Secret Invasion ''every'' hero killed Skrulls by the truck loads without blinking even when there were beaten and on the run, even [[http://en.wikipedia.org/wiki/POW POW]]s eating for their lives (ok the only ones that kill those are [[ArmiesAreEvil HAMMER]]) it makes you feel real sorry for the Skrulls (even if these ones were religious fanatics who odds are would have wiped out the human race if it wasn't for their Queen)
* Heavily analyzed in ''EarthX'', not so much with the mutated population of the world (they're all people), as with X-51 (Aaron Stack the Machine Man), who suffers from PinocchioSyndrome. At one point, Uatu actually inverts the scale [[spoiler: since he believes the Celestials are so far above ordinary organic life that we might as well be bacteria]], telling X-51 that he is superior to the artificially-created organic being [[PettingZooPeople Woodgod]] ''because'' Woodgod is a biological lifeform--a "beast". Aaron never buys into this argument, though.
** But he ''had'' adopted this viewpoint when he appeared in ''ComicBook/{{Nextwave}}.'' The official explanation is that he suffered an emotional breakdown after getting taken away by the Celestials and then seemingly rejected by them. His depression manifested as a general misanthropy ''(literal'' misanthropy: a dislike of humans).
* Examined in ComicBook/ElfQuest. It's an unwritten rule that elves, especially the Wolfriders, Don't Kill Other Elves. When finally one elf has to choose between killing his enemy and losing his son, it's appropriately traumatic for the character when he decides to shoot. However, the Wolfriders consider themselves part of the forest, and as a result they hunt, kill, eat raw meat, return their dead to the earth, and never interfere when one of their wolves is cast out from the pack (which essentially means a lonely death). The Sunfolk, who live as oasis farmers, take it one step further and lived as vegetarians for close to 10000 years before a lack of rain forced them to take up hunting. One character who particularly fits the trope is the Wolfrider chief Mantricker, who enjoys hunting humans, but would never kill one. In an unfortunate case of a localisation entirely missing the point, his name in the Dutch version roughly translates to "Humankiller".
** Concerning the interference with the pack, Cutter, living comfortably with the Sunfolk, is able to take care of his aged wolf companion in a kind of "retirement" after he is cast out.
* in ''Manga/OdeToKirihito'' by Osamu Tezuka, a newly discovered, fatal disease [[spoiler: caused by exposure to high levels of mine runoff]] called Monmow's disease causes people to change into doglike mutants before dying within about a month. Dr. Osanai Kirihito is assigned to medical research in the African village where the disease originated by his [[CorruptCorporateExecutive boss]] in order to [[ProfessorGuineaPig gather data]] on the disease.
* Something similar has popped up in, of all places, the past few years of ''Comicbook/{{Witchblade}}''; Sara Pezzini has read a monster its rights at least twice. The monster responds by attacking and she gets to kill it anyway.
* Subverted in an issue of the ComicBook/{{Superfriends}} comics (70's version): the heroes rescue a beautiful woman from what appears to be a collection of movie monsters (including a werewolf and a mummy!) It turned out however, that she was actually a space criminal, and the monsters were- '''alien superheroes''' that ''just happened'' to look like our movie monsters!
* ''ComicBook/YokoTsuno'' plays this straight and averts this as the plot demands. The insectoid Titans are generally treated with respect, for instance, since they do appear to have some human-like qualities. The antimatter-eating alien from ''The Time Spiral'' is considered to be "gross" though when it turns out to look like a jellyfish--and its fate therefore is simply [[spoiler:to be killed without mercy]].
* ComicBook/SpiderMan nearly did this in an issue of ''Comicbook/GhostRider''. He was facing the vampire queen, Lilith and a host of the undead. He attempted to use Johnny Blaze's gun on them, explaining that "They're already dead". In team ups with {{Blade}}, he has also not seemed to care much about vampires getting killed. This is the same guy who will box your ears if you try to kill Carnage, a super-powered serial killer.
* There was a 70's comic in which the [[Comicbook/TheAvengers Avengers]] were blowing up alien ships sent by Thanos. Presumably, there were aliens inside. This is odd considering the Avengers had a strict no-killing policy at the time. What makes this even more odd is that many team members have been androids, aliens, or otherwise non-human.
** This was subverted in the ComicBook/OperationGalacticStorm arc, however. ComicBook/CaptainAmerica and other Avengers were opposed to destroying the Kree Supreme Intelligence, a sentient super computer, because they considered it alive and thus its life was sacred. ComicBook/IronMan and other Avengers disagreed and destroyed it in order to save the galaxy.
*** DependingOnTheWriter, the Supremor is a cyborg and therefore partly biological. It's a gestalt made from the brains of the greatest geniuses of the Kree race (though whether it ''literally'' contains some part of those physical brains, or just digital copies of their memories, is not consistently clear). Hence the big blobby biological-looking face it uses as its avatar.
* Its long been assumed that ComicBook/{{Aquaman}} doesn't eat fish or would be offended by others eating fish. As of the DC relaunch, Aquaman shocks a restaurant full of patrons by ordering fish. As a telepath he knows the fish he's ordering have very low order intelligence.
** While he doesn't get bent about people eating fish, he however doesn't tolerate rampant killing of sea life.
*** Fridge Brilliance. He and his people are water dwelling, they have to eat SOMETHING.
** This quote also sums up his feelings about taking a life.
--->'''Aquaman:''' Do not assume I'm governed by some code against killing, or fear of legal consequences. No one will ever find your body.
* This trope leads to massive MoralDissonance in ComicBook/TeenTitans issue 100. Superboy-Prime attacks Titans Tower in an attempt to kill Superboy (Conner) and brings along a handful of Superboy clones grown from Conner's DNA. Conner brings out his emergency Kryptonite and two Titans without a [[ThouShaltNotKill no killing code]], Ravager and Robin, kill the clones by stabbing them through the heart with a Kryptonite spike. Once Prime is taken down (and bearing in mind he's the most powerful and evil of any of the villains present by a mile) the same two suggest finishing him off. They're told "that would be murder" and "we're not killers". But killing the clones was apparently okay. And just to make matters worse, ''Conner is himself a clone''. He even mentions that he started off as a "blank slate" like the other Superboy clones.
* In the ''[[ComicBook/TheAvengers Avengers Assemble Annual]]'', TheVision calls out [[Comicbook/IronMan Tony Stark]] and [[ComicBook/AntMan Hank Pym]] for leaving his disassembled body in a warehouse after he was ripped in half by [[SheHulk She-Hulk]]. Though they were both preoccupied by various crises (and one of them was a Skrull at the time), that doesn't really change the fact they left one of their teammates ''ripped up in a warehouse''. Even if they thought he was gone forever, didn't he at least warrant a proper burial?
* In an issue of ''ComicBook/YoungAvengers'', Patriot and Hawkeye II teamed up with the [[ComicBook/BuckyBarnes Winter Soldier]] to fight a MODOC squad. Winter Soldier killed several of the cyborgs with [[SuperheroPackingHeat his handgun]], which prompted Hawkeye to ask if they were human. Winter Soldier explained that the men were essentially turned into "human robots" by AIM, and that the process was irreversible. He then argued [[MercyKill that he did them a favor by killing them]].
* There was a series called ''Sentinel'', which as the named implied, was about a boy named Juston Seyfert and his "pal," a reprogrammed Sentinel. In ''ComicBook/AvengersAcademy'', Emma Frost argued that the Sentinel's programming and memories should be wiped to make it less dangerous, which Juston claimed was essentially murder. Then after the Sentinel [[HeroicSacrifice was destroyed while protecting Juston]] during ''ComicBook/AvengersArena'', he fell into a HeroicBSOD moment and stated that he no longer had any reason to live, since his best friend was now dead.
* Completely and utterly [[DefiedTrope defied]] in the ComicBook/{{Invincible}} spin-off ''Guarding the Globe.'' When [[spoiler:Japandroid sacrifices herself to stop a global parasite infection, her death is treated ''exactly'' the same as if she was human. No one even mentions that whe was a robot.]]
* An interesting case is with Hulkling in ComicBook/YoungAvengers. He isn't usually treated any differently than any other hero, despite his status as an alien hybrid being well known. However, his own treatment of people of his own race is very much filled with this trope. During the story arc when he first discovers his heritage, he at first reasons that he can't be a Skrull, and that his mother can't be a Skrull, because they're both so ordinary as far as humans go. Later, when he mentions wanting the Kree and Skrull forces to stop fighting, he makes a comment about how the Skrulls are "my people," with Billy, his boyfriend, responding with "They're '''not''' your people. They're not even '''people'''." Wolverine even gives justification as to why it's okay to use lethal force against Skrulls in this story, claiming that "They're Skrulls. [[GoodThingYouCanHeal They'll grow back.]] Eventually." In later story lines, despite having accepted his heritage, it's still obvious that everyone still considers him a human, and that he considers himself a human, and he keeps treating the Skrulls as an alien species that he can't relate to, which sometimes makes him come across like a BoomerangBigot.
* Only "Red" thinks of The ComicBook/{{New 52}} version of ''Comicbook/{{Superboy}}'' (who is half-alien ''and'' a clone) as a human. (Although Rose may have a soft spot for him, too.)
* In ''ComicBook/IronMan'' "Fatal Frontier", Tony starts thinking this way when it comes to robots and clones. He is eventually called out on it by a reporter. It turns out that this is a symptom of [[spoiler:phlogistone poisoning, which corrupts a person's very soul.]]
* DeathsHead discusses the rights of sentient robots and heroic ethics with [[ComicBook/IronMan Tony Stark]] while they are teamed up.
-->"You’re not one of those guys who has a code against killing 'except for robots'? I hate those krypto-fascists."
* Briefly discussed briefly in the ''ComicBook/AstroCity'' story, "The Eagle and the Mountain". When Samaritan is disturbed at Infidel's use of female homuculi (non-sapient mindless apparitions) for his servants, Infidel asks him if he would've been disturbed if they were robots instead.