Vampire Apocalypse Calculator

Dominik Czernia

Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland.

Email: dominik.czernia (at) gmail (dot) com

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Welcome to the Vampire Apocalypse Calculator[1], you lovely, tasty human. This sophisticated tool is based on the predator-prey model, a model that successfully describes the dynamics of ecosystems, chemical reactions, and even economics. Now it’s time to use it to answer the question: “what if vampires were among us?” You might think we’re joking, but the facts are clear. If we compare the actual world’s population[2] (Fig. 1: red points) to the exponential growth model[3], it reveals there are some hidden causes preventing the expansion of humanity.

We could theorise all day why this is, but there’s one idea we’d like to check and discuss: vampires. Are you ready to unveil the ancient mysteries of vampirism?

Figure 1. Earth’s population growth: expected logarithmic scale vs actual data. Extracted from Strielkowski et al. (2013).

What is vampirism?

Nearly every culture around the world has its blood-drinking creature. The ancient world had the female demons Lilith (Fig. 2; Babylonia) and Lamia (Greece). In Africa, the Ewe folklore believes in Adze, a vampiric being that can take the form of a firefly. Chilean Peuchen was a gigantic flying snake that could paralyse, and in Asia Penanggal was a woman who broke a pact with the devil and has been forever cursed to be a bloodsucking demon. So, why is it that vampires are known around the globe? Isn’t it suspicious?

Figure 2. Lilith, by John M. Collier (1892), oil on canvas. Source: Wikimedia Commons.

What about the vampires themselves? Today, they are usually believed to be undead creatures with supernatural powers: they don’t age, can fly, and can fully regenerate from almost any wound. They have a taste for human blood (Fig. 3), but are afraid of sunlight, silver, religious symbols, and garlic. Vampires can be killed by decapitation or a wooden stake through the heart. The last but most important thing is that vampires can’t reproduce; they can only turn a human into a vampire.

Figure 3. The Vampire, by Philip Burne-Jones (1897). Source: Wikimedia Commons.

The Calculator

What if vampires were among us? The Vampire Apocalypse Calculator allows you to check how humanity would fair in some selected scenarios from popular books and movies, as well as creating your own story from scratch. It’s your decision!

We present the result in the form of a graph that plots how three populations change: humans (blue points), vampires (red points), and vampire slayers (yellow points). You can adjust the graph if needed by setting an appropriate time scale (days, weeks, months, years, decades, centuries) and type of chart (linear or logarithmic[4]).

The vampire apocalypse calculator performs real-time numerical calculations that might sometimes be a little demanding, depending on your machine specifications. But, please, be understanding! The algorithm can receive up 13 parameters from the three populations:

  • Humans: if not interrupted by vampires, their population size will grow exponentially. The available settings are the initial population, the probability of turning into a vampire when attacked, and annual population growth. Humans’ unique ability is to grow faster when their population becomes smaller than its starting value.
  • Vampires: bloodthirsty humanoids that hunt people and turn them into new vampires. The available parameters are their initial population and their aggression level towards humans and slayers. You can make vampires smarter with their special ability. When activated, vampires will refrain from killing too many humans, so they do not lose their only source of blood.
  • Vampire slayers: an organization of brave people with one objective: save the world from vampiric domination. The available parameters are their initial population, annual recruitment speed, aggression level towards vampires, and vampire transformation probability. They cannot afford their members’ salaries if the entire world population is made up of vampire slayers, so you can turn on the vampire slayers special ability to limit the maximum size of the organization.

So, go ahead and test the Vampire Apocalypse Calculator. It’s freely available online: If you find a set of parameters that creates an incredible story, don’t hesitate and share it with your friends and us (there is a ‘Send this result’ on the website). See also the Box 1 below for more information on how the calculator came to be.

Box 1. How the Calculator came to be

The Vampire Apocalypse Calculator combines two things that I find fascinating: fiction and science. I love it when we can apply mathematical models to even the most surprising things and describing a vampire apocalypse using differential equations definitely makes the top of my list. I got inspired when I found an interesting paper regarding vampires, where the authors subtly suggested the existence of vampires based on real-life data.

That drew my attention and I decided to test it out in a scientific way with the well-known theory of the predator–prey model, based on game theory. Secondly, I needed to prepare an algorithm itself with adequate populations (humans, vampires, vampire slayers) and to create proper relationships between them. Lastly, the implemented calculations are numerical, so I needed to make them stable, no matter the set-up. That required, for example, setting a time step that on one hand, wasn’t too small (to avoid the calculations taking literally forever) and that on the other hand, wasn’t large enough to make the algorithm unstable. All of this was challenging and because I focused on the Calculator in my free time, it took me about a month to finish everything.

The last part was the hardest. I wanted my calculator to work with various input parameters so everyone could create their own scenarios. The problem with numerical calculations is their stability and the time required to compute them. A stable algorithm requires more time, but it has to be executed within a finite time, even on mobiles. So, depending on the user’s input, I needed to predict the appropriate time-step of consecutive calculations to make sure that everything will be estimated in a reasonable period. Choosing sensible parameters was a challenging task too! I had to give meaning to raw numbers to build the atmosphere of a vampire apocalypse. I’m happy that I built a tool that people find interesting and fun.

Predator–prey model: Lotka–Volterra equations

Italian astronomer and physicist Galileo Galilei (known for his experiments with falling bodies and inclined planes) once said that “mathematics is the language in which God has written the universe”. Indeed, scientists all around the world try to find suitable mathematical equations that describe the natural world properly.

If you consider a simple ecosystem with two species, e.g., foxes and rabbits, the Lotka–Volterra equations[5] generally work just fine. They are also called the predatorprey model. Why? Let’s stick with our example. The population of rabbits can peacefully live and reproduce if we assume that they have access to an unlimited source of food in the forest. On the other hand, foxes are carnivorous, so their population size depends on the accessibility of food, i.e., rabbits. Can you see where the problem is? More rabbits mean more foxes, but more foxes mean fewer rabbits.

A similar situation exists with humans (prey) and vampires (predators). Our calculator makes use of the Lotka–Volterra equations, with a few modifications. First of all, we created some vampire slayers that control the population of vampires. Secondly, we gave each group a special ability that is implemented indirectly in the algorithm. Eventually, we came up with the following differential equations:

dx/dt = x(k1 – a1y)

dy/dt = y(b1a1x + b2a2y – cz)

dz/dt = z(k2 – a2y)


  • xy, and z are the sizes of the human, vampire, and vampire slayers populations, respectively;
  • k1 and k2 are the growth rates of the human and vampire slayer populations;
  • b1 and b2 are the probabilities that a human and a vampire slayer will turn into a vampire;
  • coefficients a1a2, and c describe the aggression levels: vampires towards humans, vampires towards vampire slayers, and vampire slayers towards vampires, respectively.

For more explanations, please refer to Strielkowski et al. (2013). We based this calculator on the fourth-order Runge–Kutta method to solve the problem of differential equations.

Bloodsuckers – are vampires among us?

There are species in the animal kingdom that suck and feed on their preys’ blood. This practice is called hematophagy, and many small animals adopt it because blood is basically a fluid tissue rich in nutrients.

So, what’s the main difference between animal bloodsuckers and fictitious vampires? The former can’t turn their prey into something else by biting it or killing it. Lucky for us![6]

Some known bloodsucking animals are (Fig. 4):

  • Vampire bats: they mainly hunt birds and reptiles, but they occasionally turn their fangs on humans. Interestingly, vampire bats often share the blood that they have sucked with their hungry compatriots. That’s a real friendship!
  • Leeches: bloodsucking annelid worms that live in water. They can be used medicinally, as they can restore blood flow to damaged veins.
  • Mosquitoes: flying insects that you’re probably familiar with. They can be dangerous to humans, since mosquitoes can carry many diseases. An interesting fact is that only female mosquitoes suck blood from their victims (they need it to fuel egg production).
  • Vampire finches:  don’t let these lovely looking birds deceive you! When other food sources are scarce, they sometimes feed by drinking the blood of other birds.
Figure 4. Top left: vampire bat Desmodus rotundus, from Peru; source: Wikimedia Commons (Acatenazzi, 2005). Top right: medicinal leech Hirudo medicinalis; source: Wikimedia Commons (GlebK, 2011). Bottom left: Aedes (Ochlerotatus) sp.; source: Wikimedia Commons. Bottom right: vampire finch Geospiza difficilis septentrionalis; source: Wikimedia Commons (P. Wilton, 2009; cropped).

Humans also practice hematophagy! There are meals that contain animal blood. For example, many people around the world eat blood sausages – sausages filled with blood that has been cooked or dried. With that, we can conclude that vampires are actually among us! Of course, that’s only a half-truth; real bloodsuckers can’t turn people into vampires.


Strielkowski, W.; Lisin, E.; Welkins, E. (2013) Mathematical models of interactions between species: peaceful co-existence of vampires and humans based on the models derived from fiction literature and films. Applied Mathematical Sciences 7(10): 453–470.

Yorke, J.A. & Anderson, W.N. Jr. (1973). Predator-prey patterns (Volterra–Lotka equations). PNAS 70(7): 2069–2071.

About the author

Dominik Czernia is a PhD candidate in the Institute of Nuclear Physics of the Polish Academy of Sciences. When he was a child, he really liked mysterious and bloody stories. As an adult, he realized that blood doesn’t give you immortality in the literal sense, but it can save someone’s life! Since he turned 18, he has been donating blood regularly: 16 liters so far and feeling the need to donate more. One could say he’s the perfect prey for vampires! 😉

As part of his involvement with The Omni Calculator Project, Dominik has built a few interesting tools such as The Hot Car Calculator (, which helps people understand the lethal consequences of leaving kids unattended in cars, and The Coffee Kick Calculator (, in collaboration, which allows you to maximize your caffeinated efficiency. He’s also created many more super scientific ones that may not be as fun but are still worth a mention, such as the Space Travel Calculator, the Acceleration Calculator, and a few Velocity tools.

[1] You can find it at:

[2] World Population Clock, available from:

[3] Exponential Growth Prediction Calculator, by M. Mucha, available from:

[4] See also Log Calculator, by Haponiuk & Pal, available from:

[5] See also Yorke & Anderson (1973).

[6] Although some can transmit diseases.

Check other articles from this volume


Making a vampire

Veronika N. Laine

Netherlands Institute of Ecology (NIOO-KNAW). Wageningen, The Netherlands.

Email: veronika.laine (at) gmail (dot) com

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The modern vampire is often portrayed as a human transformed into a vampire due to a bloodthirsty spirit[1], demons[2], viruses and other pathogens[3], magic or some unknown reason[4].  Neither fiction nor more realistic accounts have shed light on the precise molecular mechanisms of how the transformation happens until the novel trilogy and TV series called The Strain (Fig. 1) introduced some ways as to how the transformation could happen. In The Strain, parasitic worms carry a virus that causes the vampiric changes to happen through a modification in the expression of genes. This change even creates new organs such as the stinger.

Figure 1. Promotional poster of The Strain TV series, directed by Guillermo del Toro and Chuck Hogan. Image retrieved from: IMP Awards (http://www.impawards. com/).

For obvious reasons, no actual experimental studies have been conducted with vampires and so the exact origin and evolution of vampirism remains unknown. A full genome-wide association study or transcriptome analysis would be preferred to recognize the exact genes behind the vampiric traits, but getting enough samples from vampires will most likely be difficult. Thus, the “candidate gene” approach might be the best method for reaching some conclusions or, if there is enough material, a whole genome sequencing and comparison to human genomes.

In this article I will explore some thoughts on how we could make a vampire in the lab and which part of the genome we would need to alter in order to see the necessary changes. Imagine if genetic engineering would be so advanced that when you tweak little bits of the human genome here and there, you could make whatever traits, even vampiric ones, appear (or disappear) any way you like. Unfortunately, reality is seldom as easy, as it has been shown in movies such as Gattaca (Columbia Pictures, 1997), Splice (Warner Bros., 2009) and the X-Men series (20th Century Fox, 2000–2017), although the genome editing method CRISPR (Cong et al., 2013; Hsu et al., 2014) has lifted genomic modification to a completely new level and has already been used in removing diseases in humans (Ma et al., 2017). Alternatively, what if vampires already existed and we could get our hands on their genome sequence? Which genes would be affected by the transformation? Intriguingly, there are real life examples of species and conditions that could be thought of as vampiric and we can find potential candidate genes for vampirism from these traits. These “vampire building blocks” could then be used in constructing a lab vampire (at least hypothetically).

The myth of vampires has been around for thousands of years and the descriptions of vampirism vary between times and cultures. The vampires we know today date back to the 17th century and they have been covered by every platform in our popular culture. A good summary of the evolution of vampire myths can be found in Harris (2001).

The exact way in which humans transform into vampires depends on the source of the story you are reading and it often remains a mystery. In the extensive study of the science of vampirism, Dr. Pecos and Dr. Lomax (2001–2017) from the late Federal Vampire & Zombie Agency (FVZA) suspected that it is a human vampirism virus (HVV) that causes the transformation. The origin of the virus is suspected to be the vampire bats and their fleas, which sounds very plausible since bats are known to be carriers of many diseases such SARS, ebola and rabies (Biek et al., 2006; Smith & Wang, 2013), and it was also suggested in the movies Daybreakers and the Underworld series. Furthermore, rabies has been suggested to be the actual origin of the modern vampire myth (Gomez-Alonso, 1998).

In this article, I will present real life examples of vampiric traits and hypothesize possible molecular mechanisms and candidate genes that could be mutated after the transformation. I will concentrate on the following three vampiric traits that are common to many descriptions of vampires:

  1. Hematophagy (that is, feeding on blood)
  2. Immortality
  3. Sunlight avoidance


For many people, bloodsucking is the first vampiric trait that comes to mind. Blood is a nutritious fluid tissue, full of proteins and lipids and it is easy to consume. In nature, blood consumption has evolved in several unrelated species throughout the animal kingdom. Among invertebrates, leeches, mosquitos and fleas are the best known examples, and some fish (lampreys) are also known to feed on blood. There are several bird species that practice hematophagy, such as the oxpeckers, hood mockingbirds and vampire finches. Among mammals, the best known hematophagic species are the vampire bats.

Several changes in the genome are needed in order for animals to survive exclusively on blood. One of the key features is to prevent the victim’s blood from coagulating while feeding. In vampire bats the plasminogen activator (PA) genes have gone through gene duplication, domain loss and sequence evolution (Tellgren-Roth et al., 2009). These genes are expressed in the saliva glands of vampire bats and the proteins they produce help to process the blood of birds and mammals. In humans, these genes protect against heart attacks by producing proteins that clear the blood vessels by degrading blood clots. The hairy-legged vampire bat’s (Diphylla ecaudata) PA genes resemble the PA genes of the closely related non-blood feeding bat species. These bats feed on the blood of birds and it seems that the activation of PA in saliva glands is enough to keep the bird blood flowing. However, in the two bat species that feed on mammal blood, common vampire bats (Desmodus rotundus) and white-winged vampire bats (Diaemus youngi, which also feed on birds), the PA genes have gone through more extensive modifications in order to better tackle the natural inhibitors of PA proteins in mammal blood. A transcriptome and proteome study of common vampire bats found additional genes expressed in the salivary glands (Francischetti et al., 2013). Furthermore, by comparing vampire bats and leeches to non-blood feeding species, Phillips & Baker (2015) found additional genes related to blood feeding, such as ectonucleoside triphosphate diphosphohydrolase-1 (ENTPD1), which has not before been linked to secretory expression. They also suggest that alternative splicing of genes has been an important mechanism for these species to rapidly evolve to feeding on blood.

In addition to blood coagulation, the vampire bats needed to overcome the bitter taste of blood. Bitterness in nature often means that the substance is poisonous and should be avoided. However, in all of the three vampire bat species there is a greater percentage of non-functioning DNA in the bitter taste receptor genes than in other bat species. These results suggest that these genes have been relaxed from selective constraint in vampire bats, which has led to a reduction of bitter taste function (Hong & Zhao, 2014).

Lastly, the problem with consuming blood is the ratio between amount of nutrition needed and the liquid consumed.  A typical vampire bat can consume half of its weight in blood in one feeding. The blood is then rapidly processed and the excess liquids are urinated within two minutes of feeding in order for the bat to take flight. Conceivably, the same effect would not be very convenient for vampires. If the vampire weighed for example 70 kg, it would need to consume 35 kg of blood in one feeding and urinate the excess liquid almost immediately, because the bladder can only hold about half litre of liquids. Furthermore, humans have about 5 kg of blood on average, so vampires would need to suck dry about seven people per night and urinate between victims, something that has not been discussed or shown in vampire stories, except in The Strain, where vampires defecate the blood while drinking. To compensate for the low intake of nutrients, vampires might slow down their metabolism and go to a hibernation mode and thus avoid the need to suck several litres of blood in one go. It would also enable fasting through hard times. In many stories, vampires have managed to survive without blood for days (see below).


Vampires are often regarded as undead; they are dead but behave like living beings, which in turn gives them eternal “life”. In this paper, I am not going to discuss whether vampires have a heartbeat or if they breathe (for that we would need actual vampire specimens); I will instead concentrate on how actual immortality could be achieved by giving real life examples.

First, we need to define what immortality is. The concept of biological immortality means that there is no mortality from senescence, which is biological aging. This of course means that the organism is not truly immortal, it can die through injury or disease. Vampires are often presented as highly resilient beings who can survive disease and injuries, but there are things that still kill them, like sunlight, a wooden stake through the heart, fire or beheading.

What is then the ultimate cause of senescence? It is still unclear how the process of senescence happens exactly, since it is a very complex phenomenon. This subject is under heavy research, especially in regard to how we could slow down or even reverse aging (de Keizer, 2017; see movies Self/less [Focus Features, 2015] and Mr. Nobody [Wild Bunch, 2009] for further thoughts). The research has been concentrating on gene expression changes, chemical and DNA damage, and telomere shortening. Telomeres are repetitive regions at the end of chromosomes. Every time cells divide, the ends of the chromosomes are progressively clipped in the replication process. Because the repetitive sequences in the telomeres are not protein coding, the clipping does not affect cell functions. When the telomeres are gone after a certain number of divisions, the cells stop dividing (Hornsby, 2007). However, cells have ways of replenishing the telomeres with an enzyme called “telomerase reverse transcriptase”. The drawback is that the majority of adult somatic (that is, non-reproductive) cells do not express telomerase, but it can be found for example in embryonic stem cells, male sperm cells, epidermal cells and in most cancer cells. In vampires, this enzyme might be active also in the adult somatic cells but this might pose an increased cancer risk. However, vampires might have ways to avoid cancer, as discussed below.

The way senescence happens is not universal; there are species where aging is negligible or cannot even be detected. There are two well-known examples of truly immortal species, the immortal jellyfish (Turritopsis dohrnii) and the animals from the Hydra genus. The immortal jellyfish, originally from the Caribbean Sea and now spread around the world, can use the process known as transdifferentiation to rejuvenate itself from its sexually mature free-swimming medusa form to sessile polyp form when the conditions turn harsh for the animal. When conditions are suitable again, the immortal jellyfish again transforms to its medusa form. This cycle can in theory continue forever, making the species immortal in the biological sense. However, this does not save the jellyfish from predators and diseases. The immortal jellyfish also appeared in the TV series Blacklist (Sony Pictures Television, 2013–present), where its cells were injected into humans in order to generate immortality. In the real world, science is not that advanced yet and it is also highly unlikely that it would be this easy to achieve immortality.

Hydras have been under more research than the immortal jellyfish. Hydras are simple freshwater animals (also cnidarians, like the immortal jellyfish) whose cells can continually divide and not undergo senescence. One gene, “Forkhead box O” (FOXO) has been extensively studied in hydras (and also in other species, like the nematode Caenorhabditis elegans, mice and humans) (Boehm et al., 2012; Martins et al., 2016). In hydras, this gene is the main player behind the renewal of the cells. In other species, this gene has been linked to aging and longevity in many studies. In an essay by Schaible & Sussman (2013), the authors suggested that during the evolution of the FOXO gene, its function changed from Hydra’s life span extending role to many other pathways related to maintenance, which altered the gene’s rejuvenating functions in multicellular eukaryotes such as humans. Thus it might be that in vampires this gene (or actually all the FOXO genes – mammals have four of these genes) have retained the original function of FOXOs.

In the mammalian world, naked mole rats (Heterocephalus glaber) and Brandt’s bats (Myotis brandtii) are exceptionally long-lived compared to other small sized mammals. Naked mole rats are known for some very peculiar characteristics. They can survive anoxic conditions, they have delayed ageing and live up to 32 years, and the species is highly resistant to cancer, among other things, making them a very interesting species for scientists to study. In studies of the longevity and cancer resistance of this species, scientists found that a gene called INK4, which is the most frequently mutated gene in human cancer, produced a new product through alternative splicing. This protein isoform (that is, protein variant), called pALT(INK4a/b), prevented the mutated cells from clustering together and thus made the naked mole rats more resilient to cancer (Tian et al., 2015). In another study by the same group, extremely high-molecular-mass hyaluronic acid was found in naked mole rat fibroblasts (the most common cells in the connective tissue of animals). The molecular weight was over five times larger than that of human or mouse hyaluronic acid. It was speculated that a higher concentration of hyaluronic acid evolved to keep the skin elastic in underground tunnels. In addition to skin elasticity, long hyaluronic acid molecules wrap around cells tightly, preventing tumor cells from replicating (Tian et al., 2013). Whole genome sequencing revealed additional genes that could be linked to longevity in this species (Kim et al., 2011).

Brandt’s bats are known to live for over 40 years, making it the most long-lived mammal of its size. In the whole genome study of the species, Seim et al. (2013) suggested that a combination of different adaptive characteristics such as hibernation, low reproductive rate, cave roosting and an altered growth hormone/insulin-like growth factor 1 axis could extend the Brandt’s bat’s lifespan. Furthermore, FOXO1 gene was expressed in high levels in Brandt’s bat suggesting a possible role also in the longevity of this species. Hibernation in general has been linked to survival of different species allowing them to withstand extreme conditions (Turbill et al., 2011; Wu & Storey, 2016). The molecular difference between hibernators and non-hibernators seems to be in gene regulation rather than a difference in the DNA sequence itself. Differential expression was detected in the genes that were involved in metabolic pathways, feeding behavior, and circadian rhythms (Faherty et al., 2016). Hibernation or some other kind of dormant state seems to be present in vampires as well, helping them to get through tough times. In the Vampire Chronicles by Anne Rice, the vampires go to a hibernation-related state to cope with changing times. In the Underworld movies, two of the elders are kept in hibernation while a third reigns over the vampires. The reign goes in cycles, each of elders having their turn over the vampires and slave lycans. This cycle has social reasons, but it also gives rest for the elders from their immortal life.


Vampires are creatures of the night and sunlight is often regarded as deadly to them; in many occasions, they burst into flames whenever in contact with sunlight. It is an adverse trait for vampires and most probably emerged through pleiotropism. Pleiotropism is a phenomenon where one gene affects two or more unrelated traits (Paaby & Rockman, 2013). Mutations in genes causing immortality or blood consumption could also cause death by sunlight (antagonistic pleiotropy). Real life examples of bursting into flames due to sunlight are obviously not found, but sun can cause problems to people with certain conditions. Sunlight can cause severe allergic reactions, people can suffer from blood disease called porphyria, or have a rare recessive genetic disorder called “xeroderma pigmentosum”.

“Sun allergy” is an umbrella term for a number of conditions where rash and blisters occur on skin that has been exposed to sunlight. Some people have a hereditary type of sun allergy, such as hereditary polymorphous light eruption, others a non-heritable type, such as solar urticaria. In some cases, symptoms only occur when triggered by another factor, such as certain medications or skin exposure to certain plants. The allergic reaction to sunlight occurs in the same way as in any other allergic reaction, although it is still not clear what the triggering component is. Somehow, the immune system recognizes the sun-altered skin as foreign to the body, which in turn activates the immune defences against it. If vampires suffer from sun allergy, could strong antihistamines and a high sun protection factor sunscreen help them survive under the sunlight, in the same way as people with sun allergies? As death is a very severe reaction to sunlight, it is likely that vampires do not suffer from a sun allergy but from something more serious.

Porphyria, a group of blood diseases, have been suggested as a possible explanation for vampire myths but these ideas have been rejected in later papers (Winkler & Anderson, 1990). However, the mechanism behind porphyria could still shed light on why sunlight would be poisonous for modern vampires. In the cutaneous forms of porphyria where the skin is mostly affected, sunlight can cause pain, blisters or open sores to the patients. The disease is often hereditary due to a mutation in one of the genes that make the heme molecule (a component of hemoglobin, the red pigment in our blood): ALAD, ALAS2, CPOX, FECH, HMBS, PPOX, UROD, or UROS (Badminton & Elder, 2005). These genes could also be suitable candidates for vampire sunlight avoidance.

There is an even more severe sunlight sensitivity illness, the rare hereditary condition called “xeroderma pigmentosum” (XP). In extreme cases, the patients need to avoid all exposure to sunlight as it can cause severe sunburn with redness and blistering. If not protected from the sun, people with XP have a high risk of developing skin cancer. XP patients’ eyes are also very sensitive to sunlight and some of the patients have neurological problems such as seizures and hearing loss. The condition is caused by mutations in the genes that repair DNA damage. This causes a deficiency in DNA repair after ultraviolet damage to cells, which in turn accumulates abnormalities to the DNA causing the cell to become cancerous or die. In most of XP cases, mutations occur in these four nucleotide excision repair related genes: POLH, XPA, XPC or ERCC2 (Schubert et al., 2014). In addition to porphyria genes, these are also potential candidates for vampires’ adverse reactions to sunlight.


Obviously, the transformation from human to vampire would affect many genes, some of the changes being bigger than others, which makes the genetic modification of human to vampire even more difficult. From the real life examples, the PA (blood coagulation) and FOXO (immortality) genes seem to be strong candidates. Furthermore, it is also possible to find more suitable genes to test and to investigate interactions between hematophagy, immortality and sun avoidance genes by using network analysis such as Genemania (Warde-Farley et al., 2010). For example, when inserting the human ortholog (roughly put, the equivalent gene) of bat PA gene, the plasminogen activator, tissue type (PLAT), the FOXO genes FOXO1 and FOXO3, and the four XP genes, POLH, XPA, XPC and ERCC2 to Genemania, it is possible to see how the genes are linked and what additional genes might be involved (Fig. 2).

Figure 2. Gene interaction network of the genes PLAT, FOXO1, FOXO3, POLH, XPA, XPC and ERCC2 done with Genemania. Showing 20 related genes with 27 total genes and 207 total links. Input genes are indicated with stripes.

In many of the traits mentioned above, we assumed that mutations in these candidate genes would be the cause of the vampiric traits. However, mutations are not the only possible cause. Epigenetic changes are functional changes in the genome that do not involve modifications in the DNA. Such mechanisms are, for example, DNA methylation and histone modification. External or environmental effects can cause DNA methylation and change gene expression. In vampires, both mutations and epigenetics could be possible players, causing changes and vampiric traits. Furthermore, if vampirism is caused by a virus or a parasite, we need to take into consideration the possible ways the pathogen could affect the human cells, which is a topic of its own.


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I would like to thank Dr. Olaf Thalmann and Angela Boeijen for insightful comments and Nina Haglund for language revision. 


Dr. Veronika Laine is a molecular biologist working currently with the great tit and she is especially interested in behavior, genes, pleiotropism, bats, kittens and vampires, especially Eric Northman. She plays too much video games.

[1] The Queen of the Damned, by Anne Rice (1988).

[2] Old folklore; Buffy the Vampire Slayer (20th Television, 1997–2003).

[3] Daybreakers (Lionsgate, 2010); the Underworld film series (Lakeshore Entertainment, 2003–2016); The Strain (20th Television, 2014–2017).

[4] Dracula, by Bram Stoker (1897); The Vampire Diaries (Warner Bros., 2009–2017); The Twilight Saga (Summit Entertainment, 2008–2012); True Blood (HBO Enterprises, 2008–2014).

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Frankenstein, or the beauty and terror of science

Henk van den Belt

Philosophy Group, Wageningen University, The Netherlands.

Email: henk.vandenbelt (at) wur (dot) nl

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In January 2018, it will be two hundred years ago that Mary Shelley’s gothic novel Frankenstein; or the Modern Prometheus was first published. However, international commemorations have already started and the so-called Frankenstein Bicentennial Project has been launched by Arizona State University. Instead of awaiting the bicentenary of the first publication, meetings have been organized to celebrate the famous occasion on which the idea of the novel was first conceived by Mary Shelley (then still Mary Godwin). That was during a memorable nightmare in the early hours of June 16, 1816, while she was staying in a villa on the shores of Lake Geneva. In mid-June 2016, therefore, an international workshop entitled ‘Frankenstein’s Shadow’ was held in Geneva to commemorate this event and to determine the contemporary relevance of Mary’s novel for understanding and assessing new developments in the modern life sciences. After all, in many contemporary debates references to her horror story are still routinely being made. Genetically modified crops, for instance, are often condemned as ‘Frankenfoods’ and life science researchers are frequently accused of hubris or attempting to play God, just as Mary’s protagonist Victor Frankenstein supposedly did. Indeed, the mere mentioning of his name readily brings to mind such associations among laypersons, or as Marilyn Butler writes, “Readers, filmgoers, people who are neither, take the very word Frankenstein to convey an awful warning: don’t usurp God’s prerogative in the Creation-game, or don’t get too clever with technology” (Butler 1993: 302).


The circumstances in which Mary first conceived the idea of her novel may help to illuminate the significance and meaning of her literary creation. In the late spring of 1816 a remarkable entourage, next to Mary Godwin, assembled on the shores of Lake Geneva: the romantic poets Lord Byron and Percy Shelley (Mary’s lover and later husband), Mary’s step-sister Claire and doctor John William Polidori. The then 28-year-old Byron was the oldest of the company; Mary was still only 18, but had already lost her first child as an unmarried teenage mother. It was a time, just after Napoleon’s defeat, that British citizens could again freely travel through Europe. Each of the participants had their own reasons to flee from the United Kingdom. Byron was haunted by creditors and scandals. Percy Shelley had abandoned his wife and child and made himself unpopular through his overt atheism. Claire had persuaded Percy and Mary to follow Byron in his travels, because she had a crush on the noble poet (her attempt to win his love would however be in vain). Young doctor Polidori had been recruited by Byron to be his travel companion and private physician, but also cherished literary ambitions himself (in 1819 Polidori would publish The Vampyre: A Tale, another product of the Geneva 1816 summer and a source of inspiration for Bram Stoker’s Dracula). The choice of Geneva as the place to stay had been partly inspired by Jean-Jacques Rousseau, the proud “citizen of Geneva”. In the footsteps of their romantic precursor, Byron and Percy Shelley wanted to experience the majestic sublimity of the natural landscape around Geneva. In the nearby hamlet of Cologny, Byron had rented a spacious residence, Villa Diodati; Percy and Mary stayed with Claire at a more modest dwelling in the neighbourhood, but regularly visited Byron to spend days and evenings at his villa.


Figure 1. Villa Diodati on the shores of Lake Geneva. Painted by Jean Dubois. Image extracted from Wikimedia Commons.

It appeared as if the summer of 1816 did not want to become a real summer. In the introduction to the revised 1831 edition of her novel, Mary looked back: “But it proved a wet, ungenial summer, and incessant rain often confined us for days to the house.” (Shelley, 2003 [1831]: 6–7). Incidentally, this was not a purely local weather condition. In North America, the year 1816 would even go down in history as “the year without summer”. We know now that these meteorological abnormalities had to do with the most violent volcanic eruption of the last one thousand years, to wit, the eruption of the Tambora on the Indonesian island of Sumbawa in April 1815. The enormous amounts of volcanic ash spread throughout the earthly atmosphere massively reflected sunlight and disturbed global weather processes for three years in a row (D’Arcy Wood, 2014).


Figure 2. Possible depiction of the eruption of Mount Tambora on Sumbawa in 1815. Author unknown; image extracted from Scientific American Blog Network (2012).

Confined by incessant bad weather and illuminated by candlelight, Byron and his guests at Villa Diodati tried to keep boredom at bay by reading ghost stories to each other. At some moment Byron proposed a kind of contest in which each of the participants had to come up with a ghost story of their own. Mary accepted the challenge, but was not immediately able to think of a suitable story. A few days later she eagerly eavesdropped on an exciting discussion between Byron and Percy about the nature of the principle of life and the possibility of artificially creating life, until she finally went to sleep in the small hours of the night. In bed, she lost herself in a dream. This was to become one of the most famous nightmares in the history of literature and must have occurred in the early hours of June 16, 1816. In the 1831 introduction, Mary described her nightly vision thus:

“I saw – with shut eyes, but acute mental vision – I saw the pale student of unhallowed arts kneeling beside the thing he had put together. I saw the hideous phantasm of a man stretched out, and then, on the working of some powerful engine, show signs of life, and stir with an uneasy, half vital motion. Frightful must it be; for supremely frightful would be the effect of any human endeavour to mock the stupendous mechanism of the Creator of the world. His success would terrify the artist; he would run away from his odious handy-work, horror-stricken”

―Shelley, 2003 [1831]: 9.


Figure 3. The ‘Monster’; frontispiece of the revised 1831 edition of Frankenstein. Theodor von Holst (1831); image extracted and modified from Wikimedia Commons.


So Mary finally had her ghost story. On Percy’s instigation, she would elaborate and rework the story during the following months and years into a full-fledged novel. On the precise way the “thing” was brought to life, the book remains understandably somewhat vague. But there is a strong suggestion that electricity played an indispensable role in infusing the spark of life into the lifeless thing. In the 1831 introduction Mary referred to so-called ‘galvanism’, which enjoyed much interest at the time. At the beginning of the 19th century several sensational experiments had been made before public audiences with the newly developed Voltaic battery, showing that electric currents could be used to arouse muscular contractions and thereby to call forth motions of the body parts of dead animals or even human cadavers. It seemed as if those body parts could be “reanimated” in this way. In one notorious demonstration performed in 1803 before a London audience, Galvani’s nephew Giovanni Aldini administered an electric current to the face of a freshly executed murderer, whereupon “the jaw of the deceased criminal began to quiver, and the adjoining muscles were horribly contorted, and one eye was actually opened” (London Morning Post, January 1803, quoted in Lederer, 2002: 14). It was not too far-fetched, therefore, to think that the mysterious principle of life had something to do with electricity. At any rate, electricity in the guise of lightning plays a major role in the depiction of the ambient atmosphere of the novel. Thus, after receiving the news about the death of his younger brother, Victor Frankenstein witnessed a ”beautiful yet terrific” thunderstorm spectacle with dazzling flashes of lightning going to and fro above the Alps, the Jura and Lake Geneva (Shelley, 2003 [1831]: 77). The electrically charged atmosphere provided a fitting background to the vicissitudes in which Frankenstein and his creature got embroiled. Mary had derived this element of the novel from the exceptional weather conditions she actually experienced in Geneva. As she wrote in a letter to her half-sister in England: “The thunder storms that visit us are grander and more terrific than I have ever seen before” (Mary’s letter to her half-sister Fanny Imlay, dated 1 June 1816; see Shelley, 1993 [1816]: 174).


Figure 4. ‘Galvanic’ experiments on executed criminals performed by Dr. Giovanni Aldini (1804). Image extracted from Wikimedia Commons.


It is not difficult to associate electricity with fire through lightning and heavenly fire. In the title of her novel Mary alluded to the Greek myth about Prometheus, the Titan who had stolen fire from the gods to give it to humankind and who was severely punished for this act. Similarly, Victor Frankenstein brought disaster upon himself and his loved ones by indulging in the “unhallowed arts” of “bestowing animation upon lifeless matter” and by creating a human-like being. He aspired “to become greater than his nature [would] allow” (Shelley, 2003 [1831]: 54), or in other words, to play God. For Byron and Percy, however, Prometheus was also the iconic rebel hero who dared to defy the existing divine order in the name of promoting human happiness. In their eyes this endeavour should not even stop short of attempting to overcome death. Mary was apparently less enamoured by the Greek demigod celebrated by her romantic companions and was acutely aware of the possible downsides of “Promethean” ambitions. Or at least she was more ambivalent. As the biographer and historian Richard Holmes noted, the romantic generation of the Age of Wonder (1770–1830) had to discover both “the beauty and terror of science” (Holmes, 2009). Mary portrayed Victor Frankenstein as an investigator who is so much obsessed by his research project that he completely neglects his social obligations vis-à-vis his family, his friends and his fiancée. For her, the outstanding example of a passionately obsessed researcher was the English chemist Humphry Davy, whose main achievements were in the domain of electrochemistry (another connection with electricity and ‘galvanism’!). In the first decade of the 19th century, Davy isolated new chemical elements like sodium and potassium with the help of the Voltaic battery. In his public lectures he also sketched an enticing prospect of the endless possibilities of chemical research that would bestow on man “powers which may be almost called creative” (Davy, 1802: 319). From reading these lectures Mary had concluded that scientists might at times be driven by a truly obsessive preoccupation. In this respect, Davy set the example for Victor Frankenstein: “So much has been done […] – more, far more, will I achieve: treading in the steps already marked, I will pioneer a new way, explore unknown powers, and unfold to the world the deepest mysteries of creation” (Shelley, 2003 [1831]: 49) ‒ this was how Victor Frankenstein described his new ambition after a university professor had pointed out the virtually unlimited possibilities of modern chemistry to him.


Figure 5. Humphry Davy isolated sodium and potassium by using the Voltaic battery. Magazine engraving (19th century), colored; image extracted from fineartamerica.


For some commentators, Frankenstein’s moral transgression was not that he undertook the over-ambitious or hubristic attempt to bestow life on inanimate matter and thereby usurped the divine privilege. He must rather be blamed for the fact that, once his work finally met with success, he immediately ran away from “his odious handy-work”. He thereby left his creature, which he himself had brought into the world, to its own fate – devoid of any parental care. The middle part of the novel, which follows the creature’s life and vicissitudes, is a morality tale in its own right. From the outset, contrary to the portrayals in most movie versions, the creature is not a ruthless monster. It wants to do good and needs the company of fellow beings and their affection and recognition. However, the saying that when you do good, good things will happen to you did not apply to the creature. Due to its hideous appearance, it repeatedly met with rejection. Its attempt to remind Frankenstein of his parental duties was also to no avail. Only as a result of all these hostile responses did the creature become a monster, intent on revenging the injustices done to it with acts of violence. In an early review of the novel, Percy Shelley summarized the simple moral lesson thus: “Treat a person ill, and he will become wicked.” (Percy Shelley, 1993: 186). Seen in this light, Frankenstein’s greatest moral shortcoming was that he failed to assume responsibility for his own creature and to give it the care that it needed and deserved.


Figure 6. Another reading of the Frankenstein tale. Image extracted from Wikimedia Commons.

The American philosopher of technology Langdon Winner was the first to use this interpretation of the Frankenstein novel as a clue for dealing more responsibly with new technologies in general: “the issue truly at stake in the whole of Frankenstein [is] the plight of things that have been created but not in a context of sufficient care” (Winner, 1977: 313). His generalized ethical message is therefore that researchers who develop new technologies must be willing to assume responsibility for the vicissitudes of their creations, help them to acquire a suitable role in society and provide adequate follow-up care if necessary. Their task is by no means completed once a new technological prototype leaves the laboratory. With so much emphasis nowadays on the necessity of responsible research and innovation, Winner’s message finds wide resonance. Similar interpretations of the Frankenstein tale have been propounded by Stephen Jay Gould (1996) and Bruno Latour (2012). Gould gives a pointed formulation of this new reading of Mary Shelley’s novel:

“Victor Frankenstein […] is guilty of a great moral failing […] but his crime is not technological transgression against a natural and divine order […] Victor’s sin does not lie in misuse of technology, or hubris in emulating God; we cannot find these themes in Mary Shelley’s account. Victor failed because […] he did not take the duty of any creator or parent: to teach his own charge and to educate others in acceptability.”

―Gould, 1996: 61.

Gould’s flat denial that the themes of hubris in emulating God and transgression against a natural and divine order are nowhere to be found in Mary Shelley’s account is quite astonishing. Traditionally, for many readers her novel is precisely also about these themes: they are by no means a later invention of Hollywood adaptations. Mary’s introduction to the 1831 edition directly contradicts Gould’s denial (see the passage quoted above). Thus the Dutch literary critic Pieter Steinz, for one, reaffirmed the traditional reading of Frankenstein: “The moral is clear, and it is more relevant than ever in the 21st century, which is dominated by the advancing genetic and bio-technologies: do not play God and beware of the dangers of technology” (Steinz 2002).

I therefore take it that the themes of hubris, transgression and playing God on the one hand and Victor’s moral failure to take responsibility and proper care for his creature on the other are both contained in the novel, so that there is no need to embrace one element and completely dismiss the other. A nuanced and balanced view, in which the two strands of interpretation are indeed combined, can be found in Mary Threapleton’s introduction to a 1963 pocket edition of Frankenstein:

“In the course of the story, Frankenstein is horribly punished for […] presuming to overstep man’s proper bounds. His brother, his best friend, and his bride all fall victim to the monster he has created. He is punished not only because he has dared to create it, but also because he fails to assume due responsibility for it. He gave the monster life, but he was too horrified to guide it, to make it into a power for good.”

―Threapleton, 1963 (emphasis mine).


The Frankenstein Bicentennial Project, set up by researchers from Arizona State University, nevertheless promotes a reading of Mary Shelley’s novel based one-sidedly on the interpretations of Winner, Gould, and Latour, while dismissing the traditional interpretation focusing on hubris and the dangers of playing God as singularly unhelpful. As some researchers affiliated with this project declare in a recent publication:

“The moral of Frankenstein is not a warning about ungodly technoscientific creation; it is a warning against taking a position that does not consider matters of care and concern for those technoscientific creations. […]  Frankenstein’s failure to care for his creation is his downfall – not his act of technological innovation. […] The lack of care for new creations is what ultimately destroys us, not the creations themselves.”

―Halpern et al., 2016: 4, 6.

Although the authors admit that they read the Frankenstein novel “against the grain of many popular interpretations, which see it as a story about the abominations created when man decides to play God” (ibid., 4), they do not explain why they deem the common understanding incorrect as an interpretation of Mary Shelley’s story. However, the protagonists of the Frankenstein Bicentennial Project may have good reasons for considering invocations of hubris and playing God “unhelpful tropes” for their own agenda of promoting responsible innovation, as these tropes tend to deny that “the human actors are responsible for their own decisions and for what they do with the fire of creativity” (ibid., 7). Indeed, one may readily admit that the standard objection of ‘playing God’, routinely raised against new developments in the modern life sciences, has been reduced to a facile journalistic cliché or an alarmist slogan, as I have argued myself in an earlier article (van den Belt, 2009). Still, this does not justify treating these themes as completely foreign to a proper understanding of Shelley’s gothic novel, the more so, as the latter’s use of the expression “unhallowed arts” clearly suggests that the very attempt to bestow life on lifeless matter may indeed be seen as “ungodly”. The real interpretative challenge is to explain how the two different readings of the novel (hubris and playing God versus Frankenstein’s moral failure to take care of his creature) can be reconciled, for there surely exists a tension between them.

If the goal is to promote responsible (research and) innovation – the underlying agenda of the Frankenstein Bicentennial Project ‒ , it also will not do to declare public fears about hubris and playing God simply out of court. After all, an important part of the new agenda is to take public concerns about new technological developments seriously and to somehow address them in the further course of the innovation process. The general public may also be concerned, and rightly so, about the “Promethean” or “hubristic” projects often being contemplated by contemporary life scientists. However much people nowadays may admire their creativity and imagination, as Mary Shelley and her contemporaries did in an earlier age, they will also feel overwhelmed when the flights of the biotechnological imagination become a little too audacious. As Richard Holmes argues, it was Shelley’s romantic generation which first had to face the beauty and terror of science (Holmes, 2009). It seems that we are still their cultural heirs.

Thus the emphatic assertion that “[t]he lack of care for new creations is what ultimately destroys us, not the creations themselves” is rather unfortunate in that it arbitrarily restricts the scope of meaningful social debate. It suggests that the public should refrain from discussing the desirability of the many new “creations” technoscientists are about to bring into the world and only see to it that proper care is offered afterward once they have been introduced. If we think about some of the wild ideas that currently circulate among synthetic biologists (e.g., proposals to resurrect the woolly mammoth or Neanderthal man and schemes for “gene drives” or for changing the nucleotide ‘letters’ of the DNA alphabet), it immediately transpires that this is too narrow a view.  Indeed, synthetic biologists and other life science researchers often set such bold targets that the audacity of the biotechnological imagination constitutes the contemporary equivalent of what was traditionally called hubris. Of course, their scientific and technological aims should not simply be rejected out of hand, but deserve to be seriously discussed – a discussion that might nonetheless be properly informed by cautionary tales about “Promethean” ambitions like Mary Shelley’s Frankenstein story.

A final critical point about the interpretation endorsed by the Frankenstein Bicentennial Project is that their notion of responsibility vis-à-vis new technologies is largely modelled on the idea of care – the care Victor Frankenstein failed to bestow on his creature. Now we know fairly well what care means as long as we are talking about parental care towards children. So the creation of an artificial human being would presumably entail taking (parental) care for the new creature, however hideous it may look. But it is far less clear what the idea of care involves when we are talking about the creation of non-human life-forms; and even less so when talking about inanimate technologies. Bruno Latour’s call to “care for our technologies as we do for our children” (Latour, 2012) is simply begging the question. In sum, a proposed ethics of care for responsible innovation sounds nice, but also remains somewhat vague.


Figure 7. The monster demands a mate! Poster for the movie Bride of Frankenstein (Universal Pictures, 1935). Image extracted from Wikimedia Commons.


There is one episode in Mary Shelley’s novel where Victor Frankenstein finally appears to become a responsible agent and to act responsibly, but this very episode is ignored and not discussed by the proponents of responsible innovation. I am alluding to the dramatic moment at a later stage in the novel when he is at first inclined to comply with his creature’s wish to have a female companion created for it, but then has second thoughts and refuses the request. He had already been working on the creation of a female being, but then decided to destroy her in her unfinished state rather than complete the job. The considerations that led him to this decision look very much like what today would be called an invocation of the Precautionary Principle. The creature had suggested that it might leave Europe and go with its female mate to an uninhabited part of South America, but Frankenstein pondered the possible long-term consequences with much anguish:

“Even if they were to leave Europe, and inhabit the deserts of the new world, yet one of the first results of these sympathies for which the demon thirsted would be children, and a race of devils would be propagated upon the earth, who might make the very existence of the species of man a condition precarious and full of terror.”

―Shelley, 2003 [1831]: 170–171.

Thus Frankenstein’s refusal to create a female mate can be seen as an act of responsibility after all, based on precautionary motives. As Leonard Isaacs writes, “Like most tragic protagonists Frankenstein has learned from his experience. With a painfully acquired sense of the wider consequences of his actions, he takes on the heavy responsibility of opposing the development of second-generation monsters” (Isaacs, 1987: 71; Isaacs draws an interesting parallel between Frankenstein and J. Robert Oppenheimer, who after the development of the atomic bomb was under pressure to develop a ‘second-generation’ nuclear bomb). The possibility of uncontrolled reproduction is a biological hazard that also has to be taken into account when we create transgenic and synthetic organisms today. Later on Frankenstein justified his decision on the basis of a kind of utilitarian reasoning in terms of the greatest happiness for the greatest number:

“In a fit of enthusiastic madness I created a rational creature, and was bound towards him, to assure, as far as was in my power, his happiness and wellbeing. That was my duty; but there was another still paramount to that. My duties towards the beings of my own species had greater claims to my attention, because they included a greater proportion of happiness or misery. Urged by this view, I refused, and I did right in refusing, to create a companion for the first creature.”

―Shelley, 2003 [1831]: 219–220.

Incidentally, this whole reasoning is of course predicated on the assumption that the artificial creature was not a member of the human species. From the very outset, its taxonomic status had been somewhat ambiguous. While Frankenstein’s intention had indeed been to create an artificial human being (Shelley, 2003 [1831]: 54), his initial speculations were also focused on creating a new species: “A new species would bless me as its creator and source; many happy and excellent natures would owe their being to me. No father could claim the gratitude of his child so completely as I should deserve theirs” (ibid., 55). It is safe to conclude that the human status of the artificial creature has been problematic from the start.

From the viewpoint of an ethics of care one could argue that Frankenstein should have complied with the creature’s demand to have a female companion created for it, given his parental duty to assure its happiness and wellbeing and given that the creature after many attempts had failed to acquire a recognized place in human society. On the other hand, it cannot be denied that there is also ethical merit in Frankenstein’s decision to decline the creature’s wish. At the very least, then, the whole episode could be an interesting test case for probing our moral intuitions about what would be truly responsible action in the given situation.

Two researchers recently formalized Victor Frankenstein’s reasoning by setting up mathematical models of species interaction, in particular modelling situations of “competitive exclusion” between two species. They conclude that “[Frankenstein’s] rationale for denying a mate to his male creation has empirical justification” and that “the central horror and genius of Mary Shelley’s novel lie in its early mastery of foundational concepts of ecology and evolution” (Dominy & Yeakel, 2016). This is a rather surprising new reading of the novel.

We may finally wonder why the proponents of responsible innovation have passed in silence over the entire episode of the novel. Perhaps it is because a (presumably) responsible decision not to create a new entity would not fit their presumption that is not the “new creations themselves”, but only our own lack of care for them that can bring us down.


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