In the 1950s, horror films were overrun with atomic mutants and invaders from space. In the 1980s, masked killers took over. Today, it is ghosts. Film historians have long argued that these shifts mirror the anxieties of their times,1,2,3 but their theories are built on the classics everyone remembers. What happens when you look at all the others?
We gathered every horror film we could find, 19,302 from 1896 to today, and sorted them by what makes them scary: 21 themes, from vampires and masked killers to aliens and haunted houses, drawn from 32 published guides to the genre. AI models did the sorting, and checked against Wikidata, a database edited by volunteers, they agree on 81% of films. The whole genre confirms much of the conventional wisdom, and overturns some of it.
What were horror films about?
Share of horror films in each major category, 1930–2023. Select a category to see its themes.
Five-year rolling averages; dotted lines mean fewer than 10 films. Horrorverse maps the same films by plot.
What replaced the slasher?
For a generation of viewers, horror meant a masked man with a knife: Halloween and Friday the 13th set off a cycle of slasher films that defined the genre in the 1980s.4,5 Horror today looks different. Different how, and since when?
Ghosts, mostly, and slowly: the change took four decades. In 1975–84, at the height of the slasher boom, 23% of horror films were about killers and 9% about ghosts. By 2015–24, killers were down to 15% and ghosts up to 16%.
But the two trends didn’t move together. Killer films have declined steadily since the early 1980s, from 26% of horror films to 14% today. Ghost stories rose in two waves: first in the early 1980s, led by The Shining and Poltergeist, then in the early 2000s, led by Ringu, Ju-on and their Hollywood remakes6. The pattern holds for big hits and obscure releases alike, in Hollywood and abroad.
Behind those two numbers is a wider change. What shrank was killers, mutants, killer animals and witches. What grew was dread closer to home: ghosts, psychological horror, demons and home invasion, what critics have since called ‘elevated horror’ or ‘post-horror’7.
Which themes grew, and which shrank
Share of horror films by theme, 1975–84 against 2015–24
Do the famous films tell the whole story?
Histories of horror are written from the films people remember: the hits, the classics, the films that get remade and taught. If those films are a fair sample, the histories hold. If not, whole trends can go unnoticed.
They are not a fair sample. Take the 1,106 horror films with Wikipedia articles in at least 20 languages, the ones historians write about and everyone has heard of. Compared with all horror films from the same decades, they hold a third fewer ghost stories (9% instead of 13%) and fewer killers, but far more spectacle than horror as a whole: 2.7 times the share of giant monsters, 74% more aliens and 45% more vampires. The rise of the ghost story happened mostly in films that never became famous.
What the famous films over- and under-represent
How much more or less often each theme appears among films with Wikipedia articles in 20+ languages than among all horror films from the same decades
Fame and quality only loosely go together. Films with articles in 40 or more languages average 6.8 on TMDB, against 6.2 for all films with 300+ ratings, but Plan 9 from Outer Space (1957) has articles in 42 languages at a rating of 4.2.
Fame against rating
TMDB rating of every horror film with 300+ ratings, against the number of Wikipedia languages with an article on it
Does horror mirror the news?
Horror is often read as a barometer: each era’s monsters stand for what that era feared.1,2 If that is right, the genre is a record of a century’s anxieties. If not, it is a story critics tell after the fact.
Up to 1990, the data backs the historians. After that, the story changes. In 1989 the sociologist Andrew Tudor studied nearly 1,000 horror films released in Britain8 and found fear moving closer to home over the century: away from gothic monsters and mad laboratories, towards the disturbed human mind.
Across all the films, the first half of that story holds. In the 1950s, the decade of H-bomb tests and Sputnik, science gone wrong peaked.1 Around 1956 it accounted for nearly half of the horror films whose threat is clear (48%), from Them! to The Fly, against 10% today. From the 1960s through the 1980s, after Psycho, human killers and disturbed minds led, just as Tudor found.
Then the pendulum swung back. Since the 1990s, the supernatural has been behind at least 40% of horror films in every decade. The post-9/11 years are often remembered for ‘torture porn’,9,10 because Saw and Hostel were hits. Across the thousands of other horror films made in the 2000s, killer films held steady at 21%; the growth was in ghosts.
Where the threat comes from
Share of horror films by source of threat, where the threat is clear; five-year rolling average
Historical eras based on Skal, Wood, Clover, McRoy and Wetmore; threat categories adapted from Tudor (see references).
How much of cinema is horror?
Every few years, horror is said to be having a boom. Is it a bigger part of cinema than it used to be?
Not among the films people watch: it was one film in five in the 1970s and 80s, and is one in seven now. Among films with at least 20 ratings on TMDB, which leaves out the truly obscure, horror made up about 20% of releases from 1970 to 1990 and has hovered around 13% since 1995. Count every film in the database and horror’s share jumps from 4% in 1975 to 14% in 2020: a flood of micro-budget films that almost no one has seen. Much of that flood is ghost stories: since 2010, 18% of the films too obscure to have 20 ratings are about ghosts, against 14% of the rest.
Horror’s share of all films
Among films with at least 20 ratings on TMDB; five-year rolling average
Films can belong to several genres.
Do horror sequels hold up?
Horror is the genre of the franchise: few others turn one hit into ten films. Are the sequels worth watching?
Rarely. In 32 of the 40 most-rated horror franchises, the original is still the best-rated film, and the films that follow score a full point lower on average on TMDB’s 10-point scale, with the same drop on MovieLens. Waiting ten years or more is a coin toss: of 24 such films, 13 beat the one before them. Halloween (2018) climbed to 6.6 after Halloween: Resurrection scored 4.6; Psycho II (1983) fell to 6.5 from the original’s 8.4. The hardest falls came after the greatest originals: Jaws (7.7, then 4.9 on average), Psycho (8.4, then 6.0 on average) and The Exorcist (7.7, then 5.5 on average). Of the 8 franchises whose best film came later, 5 owe it to a film from the last five years, whose ratings are still settling, such as The Forever Purge.
Horror franchises, film by film
TMDB ratings by release year, for the most-rated franchises
Which stories keep coming back?
Remakes are as old as horror itself, and some stories have been filmed again in nearly every decade since the silent era. Which ones?
Two nineteenth-century novels above all. Mary Shelley’s Frankenstein has been filmed again in 8 decades since its first adaptation in 1910, and Bram Stoker’s Dracula, starting with the unauthorised Nosferatu in 1922, in 7. The Fall of the House of Usher and Dr. Jekyll and Mr. Hyde share third place, with 5 decades each.
Classic stories that keep getting remade
Each row starts with a story’s earliest film, followed by one later version from each decade it was remade or adapted
Where is horror made?
Horror is often treated as a Hollywood genre, but every film industry has its own monsters. How American is it, and what does everyone else fear?
More American than anything else: the United States made between 32% and 56% of each decade’s horror films since 1950. Elsewhere, horror came in national waves: Japan in the 1950s, the decade of Godzilla (17%); Britain in the 1960s, the heyday of Hammer11 (12%); Hong Kong in the 1950s (10%); Italy in the 1970s, during the giallo boom12 (10%).
Each country also has its own signature nightmare: the theme it makes far more often than the world does. Japan, the home of Godzilla, makes giant monsters 7 times as often as the world; Australia, killer animals 3.1 times; Italy, cannibals 2.5 times. Ghost stories make up 60% of India’s horror films, 59% of Thailand’s, 41% of South Korea’s and 40% of Hong Kong’s, against 14% worldwide. Witchcraft makes up 14% of Indonesia’s horror films and 7% of Mexico’s, against 3% worldwide.
Each country’s signature nightmare
The theme each country makes most often compared with the world, for countries with 200+ labelled films
Horror films by country and decade
Share of each decade’s horror films, each country on its own scale; dotted where a decade has fewer than 300 films listed
TMDB is maintained mostly by English-speaking volunteers, so non-English films are undercounted. Countries shown reached 3% in at least one decade.
How do people describe each decade?
How viewers talk about horror changes too, and the words they reach for say what they remember about each era.
Every era has its own buzzwords. On TMDB, users tag films with keywords, and some tags turn up far more often in one decade than in any other. ‘Mad scientist’ peaks in the 1940s and fades by the 1960s; ‘slasher’ defines the 1980s and remains a staple; ‘found footage’ takes over in the 2010s.
Each decade’s signature keyword
The tag most distinctive of each decade, traced across all decades
TMDB user keywords, most of them added in recent years.
So what were we afraid of?
Seen whole, a century of horror mostly confirms the story historians tell: atomic monsters in the 1950s, human killers and broken minds through the 1980s, the supernatural ever since. Where it differs is in what got noticed. The ghost story, the biggest growth of the last forty years, grew mostly in films few people remember. The post-9/11 torture cycle that dominated the conversation barely moved the numbers. The famous films are the ones history gets written from. The rest are where much of the genre actually changed.
To find your own way through them, Horrorverse maps every one of these films by plot.
References
- David J. Skal, The Monster Show: A Cultural History of Horror (New York: Norton, 1993).
- Kendall R. Phillips, Projected Fears: Horror Films and American Culture (Westport: Praeger, 2005).
- Robin Wood, ‘An Introduction to the American Horror Film’, in Robin Wood and Richard Lippe (eds), The American Nightmare (Toronto: Festival of Festivals, 1979).
- Richard Nowell, Blood Money: A History of the First Teen Slasher Film Cycle (New York: Continuum, 2011).
- Carol J. Clover, Men, Women, and Chain Saws: Gender in the Modern Horror Film (Princeton: Princeton University Press, 1992).
- Jay McRoy, Nightmare Japan: Contemporary Japanese Horror Cinema (Amsterdam: Rodopi, 2008).
- David Church, Post-Horror: Art, Genre and Cultural Elevation (Edinburgh: Edinburgh University Press, 2021).
- Andrew Tudor, Monsters and Mad Scientists: A Cultural History of the Horror Movie (Oxford: Blackwell, 1989).
- David Edelstein, ‘Now Playing at Your Local Multiplex: Torture Porn’, New York magazine, 2006.
- Kevin J. Wetmore, Post-9/11 Horror in American Cinema (New York: Continuum, 2012).
- Peter Hutchings, Hammer and Beyond: The British Horror Film (Manchester: Manchester University Press, 1993).
- Mikel J. Koven, La Dolce Morte: Vernacular Cinema and the Italian Giallo Film (Lanham: Scarecrow Press, 2006).
How we sorted and checked 19,302 filmsMethods: sources, labels and checks
- 132classificationsof horror, from scholarship to film catalogues
- 221themesmerged from their 490 categories
- 319,302films labelledby two models; a third settled 25% of them
- 481%match Wikidataon films held back while writing the rules
- 55findings testedin 6 variants of the data
Collecting classifications
The themes come from 32 published classifications of horror: scholarship, encyclopedias, film catalogues, and sources on horror outside Europe and North America. 14 could only be checked through contents pages or other authors’ summaries.
Scholarship
- Derrycontents only
- Tudorvia secondary sources
- Carrollvia secondary sources
- Cherryvia secondary sources
- Benshoffcontents only
- Britannicaread in full
Encyclopedic
- Wikipedia Horror filmread in full
- Wikipedia navbox Horror filmread in full
- Wikipedia navbox Horror fictionread in full
- Wikipedia Category Horror genresread in full
- Wikidataread in full
- German Wikipediaread in full
- Spanish Wikipediaread in full
- Japanese Wikipediaread in full
Industry
- IMDbread in full
- AllMovieread in full
- Netflixvia secondary sources
- Rotten Tomatoesread in full
Non-Western
- Balmain Japancontents only
- Wikipedia Japanese horrorread in full
- Peirse & Martin Koreacontents only
- Wikipedia Korean horrorread in full
- Ng Southeast Asiacontents only
- Wikipedia Indonesian horrorread in full
- Wikipedia Thai horrorread in full
- Lim Philippinescontents only
- Galt Malaysiacontents only
- Sen Indiacontents only
- Wikipedia Indian horrorread in full
- Subero Latin Americavia secondary sources
- Eljaiek-Rodríguezcontents only
- Wikipedia Mexican horrorread in full
Merging them into themes
Two models, working independently, merged the 490 categories into one tree; they agreed on 97% of the sorting. The top level follows Andrew Tudor’s sources of threat. Categories labellers could not reliably tell apart in a pilot were folded into their parent, leaving 21 themes. 7 categories (demonic children, nature spirits, reincarnation, psychotic killers, death games, mutation and social and political horror) were added while merging and appear in no source.
Which sources list each theme
A filled square marks themes listed by at least two kinds of source.
Labelling the films
Claude Sonnet and Claude Opus each labelled every film, seeing its title, year, countries, genres, synopsis and TMDB keywords, and could use what they knew about it. Each gave one to three themes, a source of threat and a confidence, following written definitions and rules (a Dracula film is a vampire film whatever its setting; a stalking killer is a killer even when supernatural). They agreed on the main theme of 78% of films; Claude Fable decided the rest, and films of one series that still disagreed were reviewed together.
- Ghosts and hauntingsGhosts and spirits, Vengeful ghosts, Childbirth revenants (pontianak, kuntilanak…), Haunted places
- Demons and possessionDemons and the devil, Possession and exorcism, Satanism and devil worship, Demonic children
- Witchcraft and black magicWitchcraft and black magic
- VampiresVampires
- ZombiesZombies
- Werewolves and shapeshiftersShapeshifters, Werewolves
- Other supernaturalSupernatural, Religion and the occult, Cosmic horror, Nature spirits, Reincarnation, Supernatural creatures, Undead, Mummies, Jiangshi, Folkloric creatures (aswang, krasue…)
- Killers and slashersKillers, Slashers, Giallo, Psychotic killers
- Psychological horrorPsychological horror
- CannibalsCannibals
- Home invasionHome invasion
- Other human threatsHuman threats, Revenge, Rape and revenge, Backwoods, Death games, Family horror, Monstrous mothers
- AliensAliens
- Mutation and experimentsMutation
- TechnologyTechno-horror
- Other science and body horrorScience and technology, Body horror, Parasites and infection
- Animal attacks and eco-horrorNature, Animal attacks
- Giant monstersGiant monsters (kaiju)
- Other monstersMonsters (unspecified)
- Folk horrorFolk horror
- Gothic, survival and otherCross-cutting subjects, Gothic, Survival, Apocalypse, Social and political horror
Checking the labels against Wikidata
Wikidata’s volunteers file 2,564 of these films under a subgenre that matches one of our themes (‘vampire film’, ‘ghost film’, ‘slasher film’). We wrote the rules using half of those films; the table scores the other half: of the films Wikidata files under a theme, the share our labels also put there. The 80% bar was set before any scoring. ‘First labels’ were an earlier attempt by one smaller model reading synopses alone.
| Theme | Films | First labels | Final labels | Verdict |
|---|---|---|---|---|
| Killers and slashers | 415 | 56% | 88% | passes |
| Zombies | 248 | 61% | 83% | passes |
| Vampires | 247 | 74% | 90% | passes |
| Ghosts and hauntings | 171 | 64% | 81% | passes |
| Psychological horror | 104 | 25% | 37% | fails |
| Demons and possession | 42 | 62% | 81% | passes |
| Animal attacks and eco-horror | 40 | 53% | 75% | fails |
| Other human threats | 32 | 59% | 50% | fails |
| Giant monsters | 27 | 82% | 85% | too few films |
| Werewolves and shapeshifters | 26 | 65% | 89% | too few films |
| Other science and body horror | 21 | 38% | 52% | too few films |
| Cannibals | 14 | 50% | 79% | too few films |
| Aliens | 12 | 75% | 100% | too few films |
| Folk horror | 1 | <1% | 100% | too few films |
| All themes | 1,400 | 59% | 81% |
Wikidata is not always right either: it calls Evil Dead (2013) a zombie film and Insidious psychological horror. Shown a random 200 of the 261 disagreements with both answers and the film, Claude Fable sided with Wikidata in 13%, with our labels in 60%, and called 28% a matter of taste.
Checking the findings
Each headline finding was recomputed for well-known films only, the most confident labels, each film’s main theme only, films from English-speaking countries and from all others, and with the first, synopsis-only labels, so that what the models know about famous films cannot drive a finding. The page states a finding only if it holds in all of them.
| Finding | All films | Films with 100+ votes | High-confidence labels | Main subject only | English-speaking countries | Other countries | Synopsis-only labels |
|---|---|---|---|---|---|---|---|
| Killers and slashers fell by 3+ points (1975–1984 → 2015–2024) | 23% → 15% | 24% → 14% | 31% → 20% | 25% → 16% | 28% → 17% | 18% → 9% | 20% → 12% |
| Ghosts and hauntings rose by 3+ points (1975–1984 → 2015–2024) | 9% → 16% | 6% → 12% | 8% → 19% | 8% → 17% | 6% → 12% | 11% → 24% | 9% → 15% |
| Science threats peaked in the 1950s | 1950s | 1950s | 1950s | 1950s | 1950s | 1950s | 1950s |
| Human threats peaked between the 1960s and the 1980s | 1970s | 1970s | 1980s | 1970s | 1960s | 1970s | 1970s |
| Supernatural threats at 40%+ in every decade since the 1990s | 47%–54% | 47%–52% | 47%–53% | 47%–54% | 44%–49% | 52%–63% | 47%–51% |
Notes
Films. The 19,302 films that TMDB or MovieLens list as horror, with TMDB metadata as of October 2026. Shares use a five-year window centred on each year, widened up to fifteen years before 1956, where films are fewer; charts end in 2023, the last year with a full window. A film with several themes counts partly toward each.
Franchises. TMDB collections with at least four horror films of 50+ votes; the 40 with the most votes in total. MovieLens ratings, on a five-point scale, are doubled for comparison and used where 50+ people rated a film.
Stories that came back. For each film made by 1985 with 100+ votes, the twelve most similar later synopses (20+ years on; BGE-small embeddings) were judged by Claude Sonnet as remake, same source, retelling, sequel or unrelated (3,436 pairs); Claude Opus then checked every later film against the first film of its row (64 of 125 confirmed).
Keywords. Distinctiveness is a log-odds ratio with an informative Dirichlet prior (Monroe, Colaresi and Quinn, 2008); shares count films with at least one keyword. Countries and all-film counts come from TMDB’s own totals.
Film data and posters from TMDB, ratings from MovieLens, subgenres and Wikipedia links from Wikidata. This product uses the TMDB API but is not endorsed or certified by TMDB.