The Eternals

• Core Identity: The Eternals are a race of genetically-engineered, effectively immortal humanoids created by the cosmic gods known as the Celestials to serve as Earth's defenders against their monstrous counterparts, the Deviants.
• Key Takeaways:
• Role in the Universe: Originally conceived as planetary guardians, the Eternals' true purpose and nature have been revealed to be far more complex, acting as a planetary immune system designed by the celestials to cultivate life for cosmic purposes. They are the inspiration for many of Earth's myths and legends about gods and heroes.
• Primary Impact: Their greatest impact is their millennia-long, clandestine war against the deviants, which has shaped human history from the shadows. The existence of their offshoot branch, the Titanian Eternals, directly led to the birth of the universe-threatening villain thanos.
• Key Incarnations: The fundamental difference lies in their origin and nature. In the Earth-616 comics, they are an organic, evolutionary offshoot of humanity. In the Marvel Cinematic Universe, they are synthetic, artificially constructed beings with programmed directives and a cyclical, memory-wiped existence.

The Eternals were created by the legendary writer and artist Jack “The King” Kirby upon his return to Marvel Comics in the mid-1970s. They first appeared in The Eternals #1 (July 1976). Kirby, having previously explored similar themes of space gods and mythic heroes with his Fourth World saga at DC Comics, brought his signature cosmic scope and epic imagination to the Marvel Universe. The series was heavily influenced by the “ancient astronauts” theories popular at the time, particularly Erich von Däniken's book Chariots of the Gods?. Kirby's core concept was that the gods and monsters of human mythology were not supernatural beings but were, in fact, powerful alien-engineered humanoids whose ancient conflicts were witnessed by early humanity. The series established the Celestials as the silent, all-powerful creators and the Eternals and Deviants as their warring children. Though Kirby's initial series only ran for 19 issues and one annual, its concepts were later integrated into the broader Marvel continuity by writers Roy Thomas and Mark Gruenwald, solidifying the Eternals' place in the universe's cosmic hierarchy.

Approximately one million years in the past, a colossal starship belonging to the First Host of the Celestials arrived on Earth. These silent space gods conducted a series of genetic experiments on the planet's dominant intelligent lifeform, nascent humanity. From these experiments, three distinct offshoots of the human race were created:

• The Eternals (Homo immortalis): Beings of immense power and longevity, blessed with cosmic energy and a psychic connection to one another. They were designed to be beautiful, orderly, and to act as the planet's protectors.
• The Deviants (Homo descendus): A genetically unstable race prone to constant mutation. Each Deviant is unique, often monstrous in appearance, creating a chaotic and resentful society. They were seen as a failed experiment by the Celestials and became the Eternals' natural adversaries.
• Mainstream Humanity (Homo sapiens): The baseline race, left with latent genetic potential that would, over millennia, manifest as super-powered individuals, Inhumans, and importantly, the X-Gene that creates mutants.

The early history of the Eternals was marked by a devastating civil war. Two factions, led by the brothers Kronos (peaceful and scientific) and Uranos (warlike and expansionist), clashed over the future of their race. Kronos's faction was victorious, and Uranos and his followers were exiled into space. They eventually settled on the moon of Uranus, where they built a new colony. A later internal conflict among these exiles led to a second group settling on Saturn's moon, Titan, becoming the ancestors of the Titanian Eternals, most famously A'lars (Mentor) and his mad son, Thanos. Back on Earth, a laboratory accident involving cosmic energy disintegrated Kronos's physical body, but elevated him to a cosmic entity with mastery over time. His sons, Zuras and A'lars, became the new leaders. Zuras was elected Prime Eternal, the leader of Earth's Eternals, who built their hidden cities of Olympia in Greece, Polaria in Siberia, and Oceana in the Pacific. They adopted a policy of non-interference with humanity, only acting to combat threats from Deviants or other cosmic forces that endangered the planet's overall survival.

The origin of the Eternals in the MCU, as detailed in the film Eternals (2021), is a radical departure from the comics. In this continuity, the Eternals are not an organic offshoot of humanity but are synthetic beings—sophisticated androids created by the Prime Celestial, Arishem the Judge, in the World Forge. Their stated mission was to protect emerging intelligent life on designated planets from the Deviants, a species of predatory monsters that had also been created by the Celestials but had evolved beyond their control. For 7,000 years, the team of ten Eternals assigned to Earth—led by Ajak and including Sersi, Ikaris, Thena, Kingo, Sprite, Phastos, Makkari, Druig, and Gilgamesh—lived among humans, fighting Deviants and quietly guiding human development. However, their true purpose was a closely guarded secret known only to the Prime Eternal, Ajak. The real mission was not to protect humanity for its own sake, but to cultivate a large enough human population to trigger the “Emergence.” An embryonic Celestial, Tiamut, was growing within the Earth's core, feeding on the life energy of its inhabitants. The Emergence would result in the birth of this new Celestial, but in doing so, would completely destroy the Earth and all life on it. This process was cyclical. Once an Emergence was complete, the surviving Eternals would have their memories wiped by Arishem and be “recycled” for deployment on a new planet. The Deviants on Earth had evolved, developing the ability to absorb the cosmic energy of the Eternals they killed, allowing them to heal and gain new abilities, creating a far greater threat than anticipated. The revelation of their true purpose created a profound schism within the Eternals, forcing them to choose between their duty to their creator and their newfound love for humanity, a conflict that formed the central plot of their debut film. This backstory also provides the in-universe answer to the frequently asked question, “Why didn't the Eternals help fight Thanos?”—they were under strict orders from Arishem not to interfere in human conflicts unless Deviants were involved.

All Eternals possess a baseline of superhuman abilities derived from their ability to metabolically process and manipulate cosmic energy. While some Eternals specialize, they all share these core powers:

• Immortality & Durability: They do not age and are immune to all terrestrial diseases. They possess incredible resilience to injury, and their psionic control over their own molecular structure allows them to regenerate from nearly any wound that doesn't disperse their atoms.
• Superhuman Strength, Speed, and Stamina: Their physical abilities are far beyond those of the finest human athlete.
• Flight: By psionically levitating themselves, all Eternals can fly at great speeds.
• Cosmic Energy Projection: They can project beams of cosmic energy from their hands or eyes, typically as concussive force or intense heat.
• Psionic Abilities: All Eternals possess some level of telepathy and telekinesis. They maintain a constant, low-level psychic link with one another and can read the minds of “lesser” beings.
• Molecular Manipulation: This is their most potent and versatile ability. Eternals can rearrange the atoms of matter, allowing them to transmute substances, create objects, and repair damage. Sersi is considered the most adept at this power.

A recent retcon in Kieron Gillen's 2021 run revealed the true nature of their immortality: upon death, an Eternal's consciousness is uploaded to “The Machine” (the Earth itself) and a new body is activated. However, this process comes at a terrible cost: it requires the life force of a random human being, a fact that was hidden from the Eternals for millennia.

The Uni-Mind is the ultimate expression of the Eternals' collective nature. It is a powerful gestalt entity composed of the combined consciousness and cosmic energy of multiple Eternals. To form it, the Eternals engage in a ritual, merging their physical and mental forms into a single, massive being of pure energy and thought. The Uni-Mind possesses the aggregate power and intellect of all its component members and is used to make critical decisions or to confront threats that are too powerful for any single Eternal. The Prime Eternal typically initiates and directs the Uni-Mind.

In the MCU, the Eternals' powers also stem from cosmic energy, but they are far more specialized. Each Eternal was specifically designed by Arishem with a distinct primary ability, preventing significant overlap and encouraging teamwork. They channel this cosmic energy to power their abilities and to create golden, hard-light constructs.

The MCU team is a curated group of ten, with some significant changes in name, gender, and personality from their comic counterparts to create a more diverse and cinematic ensemble.

• The Avengers: While the Eternals as a whole remain aloof, several members have served with Earth's Mightiest Heroes. Sersi's tenure was the most significant, where she proved to be a powerful and unpredictable member. Gilgamesh also served for a brief time. Their relationship is one of occasional, necessity-driven alliance rather than close friendship.
• Thor and the Asgardians: The Eternals and the Asgardians have a complex relationship built on mutual, if grudging, respect. Both are long-lived, powerful races that have been mistaken for gods by humanity. They have come into conflict, particularly when the Celestials judged Asgard, but have also allied against common threats.
• Machine Man (Aaron Stack): In the 2006 storyline, the amnesiac Makkari befriends the advanced android Machine Man. Stack's logical, robotic perspective provides a crucial foil to the divine and mythic nature of the Eternals, and he becomes a key ally in their fight against the Dreaming Celestial.

• The Deviants: The Eternals' primary and eternal foes. As their genetic opposites, the Deviants represent chaos to the Eternals' order. Their conflict is ideological, aesthetic, and genetic. Led by Warlord Kro, the Deviants have schemed for millennia to usurp humanity and destroy their ancient enemies. The love affair between Thena and Kro is a central point of tragic conflict between the two races.
• The Celestials: A profound and terrifying paradox, the Eternals' creators are also their most dangerous antagonists. The Celestials are utterly indifferent to the lives of their “children,” viewing them merely as tools or experiments. On multiple occasions, the Celestials have arrived to judge Earth, threatening to “purify” the planet, forcing the Eternals into the impossible position of defending humanity from their own gods.
• Thanos: While a Titanian Eternal, Thanos represents the ultimate perversion of the Eternal ideal. His nihilistic obsession with death and conquest makes him an enemy of all life, including his own extended race on Earth.

The Eternals' primary affiliation is to their own race and their sworn duty to the Celestials. Their insular nature means they rarely join outside organizations. The most notable exceptions are Sersi and Gilgamesh, who both had official tenures as members of the avengers. These instances were born of unique circumstances and are not representative of the Eternals as a whole, who prefer to operate from their hidden cities.

The original run that established the entire mythology. The story begins with archaeologist Dr. Daniel Damian and his daughter Margo discovering the existence of the Eternals through Ikaris. The series introduces the core conflict: the impending return of the Fourth Host of the Celestials to judge Earth's worthiness. The Eternals must prepare for their creators' arrival while simultaneously battling the Deviants, who see the Celestials' return as a chance to seize power. This storyline laid the groundwork for the cosmic hierarchy of the Marvel Universe, establishing the Celestials as a power level far beyond anything seen before and defining the fundamental purpose of the Eternals and Deviants.

This critically acclaimed seven-issue miniseries revitalized the Eternals for the modern era. The story opens with the Eternals living on Earth as ordinary humans, their memories completely erased. A medical intern named Mark Curry (secretly Makkari) begins to have strange dreams and is contacted by Ikaris, who is slowly piecing together their true identities. They discover that their collective amnesia was the work of Sprite, the child-like Eternal, who used the power of the Dreaming Celestial (a dormant Celestial buried beneath San Francisco) to rewrite reality so she could finally age and live a normal life. The series was a masterful reintroduction, focusing on mystery, identity, and the human cost of immortality, and it successfully brought the Eternals back to the forefront of the Marvel Universe.

Launched to coincide with the MCU film, this series fundamentally redefined the Eternals' lore. The story begins with Ikaris's resurrection following his death, only for him to learn a horrifying truth from Zuras: “The cost of resurrection is a human life.” The Machine of Earth that resurrects them requires a life to be forfeit. This revelation shatters their perception of themselves as protectors. Furthermore, they discover one of their three guiding principles (“Protect Celestials”) has been corrupted by a traitor, leading them to unknowingly protect a hidden flaw in their programming that is driving them to self-destruction. This series adds a layer of cosmic body horror and moral tragedy to the Eternals, reframing them as tragic figures trapped in a system they never understood, forced to confront the sins of their own existence.

In the Ultimate Marvel continuity, the concept of the Eternals is radically different. The series Ultimate Origins reveals that humanity itself was genetically engineered by the Celestials (depicted as silent, towering figures of different colors and shapes) to become the universe's ultimate super-weapon. The “Eternals” of this universe are a select group of these engineered humans who were granted immense power and longevity to act as planetary overseers and heralds for their creators, known as the “Gods.” When a universal threat like the Phoenix Force is detected, they are tasked with terraforming the world and activating its population to fight it.

In the dystopian future of the Earth X universe, the Eternals, like many of Earth's super-beings, have a hidden origin. It is revealed that the beings they believed to be the Celestials were, in fact, cosmic manipulators who planted a Celestial embryo in the Earth's core. The Eternals of this reality were created to be the planet's “antibodies,” destined to protect the growing Celestial from threats like Galactus. However, the ultimate twist is that the Eternals are revealed to be prime specimens of the Skrull race, brainwashed and manipulated into believing they were a unique offshoot of humanity.

• celestials
• deviants
• thanos
• kro
• avengers
• celestials (mcu)
• arishem the judge

^{1) 2) 3) 4) 5) 6)}