The Call of Cthulhu Explained: Why Lovecraft’s Cosmic Horror Still Terrifies Us

H.P. Lovecraft’s The Call of Cthulhu remains one of the most influential horror stories ever written, not because of graphic scares, but because of the ideas it introduces. Written in 1928, the story helped define cosmic horror, a genre built on the terrifying suggestion that humanity is neither important nor protected in the vast universe.

The Call Of Cthulhu

The account begins with the papers of a man named Francis Wayland Thurston, who inherits a strange collection of documents after the sudden death of his grand-uncle, Professor George Gammell Angell of Brown University. The professor had been a respected authority on ancient languages and archaeology, known for his rational mind and careful scholarship. Yet among his belongings, Thurston discovers something deeply unusual, a series of notes, clippings, and testimonies all connected by a single, unsettling word: Cthulhu.

At first, the material seems disjointed and confusing. There are references to dreams, strange cults, and a grotesque stone carving. But as Thurston begins to organise the documents, he realises that his uncle had been quietly investigating a mystery that spanned continents, cultures, and decades.

The earliest piece of evidence concerns a young sculptor named Henry Anthony Wilcox. In March of 1925, Wilcox visits Professor Angell carrying a small but disturbing bas-relief he claims to have sculpted from a vivid dream. The object depicts a monstrous figure, part dragon, part octopus, part human, standing before strange, impossible architecture. The design is unfamiliar, yet it carries an unsettling sense of ancient authenticity.

Wilcox explains that he has been experiencing intense dreams of vast, cyclopean cities and a towering, winged creature. These dreams feel more like memories than imagination. He also speaks strange words, phrases he cannot consciously understand, one of which sounds like “Cthulhu.”

Intrigued, Professor Angell begins recording Wilcox’s experiences. Soon after, however, the sculptor falls into a feverish delirium, muttering in unknown languages and describing colossal structures rising from the sea. During this time, similar disturbances begin appearing elsewhere, artists, poets, and sensitive individuals across the world report unsettling dreams filled with alien landscapes and immense, looming presences.

Then, as suddenly as it began, the phenomenon fades. Wilcox recovers, remembering little of what he said during his illness. Though strange, the incident might have remained an odd curiosity, if not for something Professor Angell uncovers months later.

While attending an archaeological conference, Angell is approached by Inspector John Raymond Legrasse of the New Orleans police. Legrasse had once participated in a raid on a remote swamp gathering years earlier, where authorities had discovered a secretive cult performing disturbing rituals. During that raid, the police seized a small idol, one that closely resembles Wilcox’s sculpture.

The idol depicts the same grotesque being: a creature with a pulpy, tentacled head, a scaly body, and folded wings. Its craftsmanship appears ancient and unlike any known cultural style. None of the experts at the conference can identify its origin.

Legrasse recounts what happened during the raid. Acting on reports of strange disappearances and eerie chanting, the police had ventured deep into the Louisiana swamps. There, hidden among the trees, they found a group of men engaged in a ritual around a stone altar.

The cultists came from diverse backgrounds, sailors, outcasts, and individuals from different ethnic groups, yet all were united by their devotion to the same unknown entity. When questioned, they spoke of ancient beings older than humanity, beings that once ruled the Earth before mankind existed.

Their chants included a phrase repeated with reverence and fear:“Ph’nglui mglw’nafh Cthulhu R’lyeh wgah’nagl fhtagn.”

Through interrogation of one particularly knowledgeable member, the police learned fragments of the cult’s belief. They worshipped entities known as the Great Old Ones, cosmic beings who had descended from the stars long before human history. These beings were not dead, the cult insisted, but sleeping, waiting for the time when the stars would be right.

One of these beings, Cthulhu, lay entombed beneath the ocean in a submerged city called R’lyeh.

The cult believed that sensitive minds could hear Cthulhu’s call through dreams. Artists, visionaries, and the mentally unstable were said to be especially vulnerable.

This revelation deeply unsettles Professor Angell, particularly because it aligns with Wilcox’s earlier dreams. He begins compiling historical records and finds references across centuries, strange legends, unexplained rituals, and scattered mentions of monstrous beings waiting beneath the sea.

But before he can complete his research, Professor Angell dies suddenly after being knocked down by a sailor in a crowded street. Though officially ruled an accident, the circumstances strike Thurston as suspicious, especially given what he has now learned.

Determined to uncover the truth, Thurston continues his uncle’s investigation. Among the remaining papers, he discovers a final and most disturbing account, a report from a Norwegian sailor named Gustaf Johansen.

This document describes an incident at sea involving the schooner Emma.

According to the report, Johansen and his crew encountered a mysterious yacht abandoned in the Pacific. When they boarded, they discovered signs of struggle and evidence that something terrible had happened to its previous occupants.

Soon after, they encountered a vast, unnatural region of ocean where the water behaved strangely, as if something enormous had shifted beneath the surface. Then, without warning, a section of the sea rose, revealing a massive, alien city emerging from the depths.

The city was unlike anything human architecture could produce. Its angles seemed wrong, its proportions impossible. Surfaces sloped in ways that confused perception, as though the geometry itself defied natural law.

As the sailors explored the structure, a great stone door began to open. From within emerged something colossal.

Johansen describes a towering entity with a massive, tentacled head, immense wings, and a body that seemed both solid and fluid at once. The presence of the creature overwhelmed the senses, radiating an ancient and incomprehensible power. Panic spread among the crew. Some fled. Others froze in terror.

Johansen and the remaining sailors attempted to escape aboard their ship, but the being moved with terrifying speed despite its immense size. In desperation, Johansen steered directly toward it, ramming the creature with the vessel.

For a moment, the impact seemed to disperse its form, yet the entity began to reassemble itself, as though physical damage meant nothing to it. The sailors managed to flee as the city slowly sank back beneath the ocean, taking the creature with it.

Johansen was later found alone at sea, the sole survivor. His account was written shortly before his death under unclear circumstances.

After reviewing all the evidence, the dreams, the cult, the ancient idol, and Johansen’s testimony, Thurston reaches a chilling conclusion.

Cthulhu is real.

What Cthulhu Is — And What It Is Not

One of the most overlooked facts in Lovecraft’s mythos, and one casual fans rarely encounter, is this: Cthulhu is not a supreme god. He is not the ruler of all cosmic entities, nor the ultimate power lurking at the edge of reality. Instead, Lovecraft presents Cthulhu as something far more unsettling, a high-ranking priest, a powerful but subordinate being in service to forces even older and more incomprehensible.

This single detail reframes everything. If Cthulhu, a being capable of warping minds and reshaping civilisations, is merely a priest, then what kind of entities does it serve?

Lovecraft places Cthulhu among the Great Old Ones, an ancient race of alien beings that came to Earth long before humanity existed. They are not supernatural in a religious sense; they are extraterrestrial, extra-dimensional, and utterly non-human. Their power does not come from divinity, but from scale, age, and origins that predate terrestrial life.

Cthulhu is one of these Great Old Ones, entombed, dreaming, and waiting in the sunken city of R’lyeh, beneath the Pacific Ocean. It is not worshipped because it demands devotion, but because certain fragments of humanity remember it once ruled the world.

“It Cannot Be Described” — And Yet, Lovecraft Tries

Lovecraft famously avoided precise physical descriptions, often insisting that his creations could not be fully conveyed in human language. Cthulhu is the prime example of this technique.

And yet, scattered across The Call of Cthulhu, are enough specific details to assemble a disturbing composite.

Cthulhu is described as colossal, its size dwarfing ships, structures, and human perception itself. It is not merely large, it exists on a scale that feels architecturally wrong, as though it belongs to a different reality with different physical laws.

The most recognizable feature is its head: A massive, bulbous form covered in writhing, fleshy tendrils, often compared to an octopus, though this comparison is acknowledged as inadequate. These appendages are not decorative; they suggest sensory organs or structures evolved for purposes humans cannot understand.

Its body is described as vaguely humanoid but grotesquely distorted. It possesses a torso, arms, and legs, yet none conform to human proportion. The form appears simultaneously solid and unstable, suggesting a physiology that does not obey conventional biology.

From its back extend enormous wings, folded like those of a dragon or bat. These wings are not merely symbolic; they imply that Cthulhu is capable of movement through air despite its immense mass, reinforcing the idea that earthly physics may not fully apply to it.

The texture of Cthulhu’s body is repeatedly described as gelatinous, rubbery, or semi-fluid. This detail is crucial. It implies that Cthulhu is not composed of flesh in any human sense. Its substance seems mutable, able to absorb damage, reform, and persist in ways no terrestrial organism could.

Lovecraft never settles on a single metaphor, because none suffice. Instead, he layers comparisons, octopus, dragon, titan, idol, until the reader understands the point: Cthulhu does not belong to Earth’s evolutionary tree.

The Architecture of R’lyeh and Its Reflection in Cthulhu

Cthulhu cannot be separated from the city in which it lies dormant. R’lyeh is described as a sunken metropolis of non-Euclidean geometry, where angles behave incorrectly and scale becomes deceptive. Structures lean at impossible slants; surfaces appear flat yet distort perception. The city itself feels alive, hostile to human cognition. Cthulhu’s form mirrors this environment.

Just as R’lyeh defies geometry, Cthulhu defies anatomy. The implication is clear: the city was built for beings like Cthulhu, not the other way around. Human minds struggle to comprehend the city because they are attempting to interpret alien design through human frameworks. This reinforces a critical point in Lovecraft’s lore: Cthulhu is not an invader adapting to Earth. Earth is a temporary domain reclaimed by something that was here first.

Literary Origin — Where Cthulhu First Appeared

Cthulhu first appeared in 1928, in the short story The Call of Cthulhu, published in Weird Tales. This story did not present a traditional narrative, but a compilation of documents, testimonies, and reports, mirroring the structure of forbidden research.

Unlike later mythos entries, The Call of Cthulhu does not portray Cthulhu as active or dominant in the present world. Instead, it establishes Cthulhu as latent, a presence whose influence leaks through dreams, cult memory, and ancient texts.

Though Cthulhu himself appears directly only briefly, his shadow looms over the entire narrative. Lovecraft understood that implication is more powerful than exposure.

Cthulhu later appears or is referenced in other Lovecraft stories, including:

• The Shadow Over Innsmouth (indirectly, through shared cults and sea-related entities)

• At the Mountains of Madness (which expands on the Great Old Ones’ ancient war with the Elder Things)

• The Whisperer in Darkness (which further contextualizes extraterrestrial intelligences)

These stories deepen the mythos without centering Cthulhu as the ultimate force, again reinforcing its role as one powerful figure among many.

Forbidden Knowledge — The Tomes That Speak of Cthulhu

Cthulhu’s existence is preserved not through public history, but through scattered, dangerous texts, works humanity was never meant to read. Among the most important are:

The Necronomicon: Written by the mad Arab Abdul Alhazred, this is the most infamous tome in Lovecraft’s mythos. It contains references to Cthulhu, R’lyeh, and the Great Old Ones, describing them as beings who “were, are, and shall be.” The Necronomicon frames Cthulhu not as dead, but as dreaming.

The Pnakotic Manuscripts: Far older than the Necronomicon, these texts are said to originate from pre-human civilisations. They describe the arrival of the Great Old Ones and hint at wars between ancient species. References to Cthulhu place it among the rulers of Earth during a time when humanity did not yet exist.

The Cultes des Goules: A later compilation that references surviving cult practices and the persistence of forbidden worship. Cthulhu’s name appears here as part of rituals passed down through generations.

Unaussprechlichen Kulten: A text focused on secret religions and pre-Christian beliefs, where Cthulhu is described as a priest-entity tied to stellar alignments. These tomes share a consistent theme: Cthulhu is not unique, but representative, a fragment of a far larger cosmic hierarchy.

Priest of the Great Old Ones

Perhaps the most important lore detail to understand is Cthulhu’s role. Cthulhu is described as a high priest of the Great Old Ones, entities that arrived from the stars when the universe was young. These beings ruled Earth long before humans evolved, shaping life and geography before retreating or being entombed.

As a priest, Cthulhu’s purpose is not conquest, but preservation and awakening. It waits, dreaming, broadcasting its presence across time and space until the conditions are right for its kind to return. This distinction matters. Cthulhu is not the final horror, it is a signpost.

Expansion Beyond Lovecraft — The Growing Mythos

After Lovecraft’s death, other writers expanded the mythos, adding interpretations while maintaining its core themes.

Notable contributors include:

• August Derleth, who formalised the mythos structure and emphasized elemental associations

• Clark Ashton Smith, who expanded cosmic antiquity and alien civilizations

• Ramsey Campbell, who modernised Cthulhu’s influence

• Brian Lumley, who explored cult persistence and psychic echoes

While interpretations vary, most retain Lovecraft’s original conception: Cthulhu as ancient, alien, and profoundly indifferent.

Cthulhu Rising: A visual representation of the cosmic dread and ancient power that H.P. Lovecraft introduced in his 1928 masterpiece.

In this video, we explore The Call of Cthulhu in two parts. First, the full story is narrated from beginning to end, following a trail of strange dreams, ancient cults, and forbidden discoveries. Then, the deeper meaning behind the tale is examined, revealing why Cthulhu is less a monster and more a symbol of cosmic indifference.

Lovecraft’s horror comes from implication rather than action. The true fear lies in knowledge, the realisation that ancient forces existed long before humanity and may continue long after we are gone. These themes feel especially relevant today, as modern science continues to reveal just how vast and unknowable the universe truly is.

Whether you’re new to Lovecraft or revisiting the mythos, this video breaks down why The Call of Cthulhu still lingers in the mind — and why some truths may be better left buried.

The Call of Cthulhu employs a fragmented, "found footage" narrative structure to build dread, forcing audiences to piece together a terrifying, impossible reality from disparate, ancient sources. The story's enduring legacy is evident in modern pop culture, influencing cosmic dread in media ranging from H.R. Giger’s Alien to games like Bloodborne. Explore the lasting influence of Lovecraftian horror at BBC.