+++
title = "宇宙多元論"
description = "宇宙多元主義は、単に複数の世界としても知られ、知的生命体が存在するはずの地球に加えて、複数のまだ未知の世界が存在しなければならないという考えです。宇宙の広大さは、この考えを強く裏付けています。"
template = "wiki-page.html"
toc = true

[extra]
category = "Science & Technology"
editorial_pass = "2026-05"
entry_type = "concept"
claim_type = "direct"
alternative_names = ["Plurality of worlds", "Plurality of inhabited worlds", "Many-worlds cosmology (in the classical sense, distinct from the Everett quantum interpretation)", "Pluralität der Welten", "Pluralité des mondes"]

[extra.infobox]
type = "Philosophical and scientific doctrine that the universe contains many worlds (or many *inhabited* worlds) beyond Earth"
opposed_position = "Aristotelian unique-world cosmology — the doctrine that there is one world (the sublunary terrestrial sphere plus the supralunary celestial spheres) and no other"
ancient_origin = "Greek atomism, formulated by Leucippus and Democritus (5th century BCE); systematised by Epicurus (341–270 BCE); transmitted to Latin antiquity by Lucretius (*De Rerum Natura*, c. 50 BCE)"
medieval_developments = "1277 Paris Condemnations of Étienne Tempier opening philosophical space for plurality; Jean Buridan (14th century); Nicole Oresme (14th century); Nicholas of Cusa (*De Docta Ignorantia*, 1440)"
early_modern_milestones = "Copernicus (*De Revolutionibus*, 1543); Bruno (*De l'infinito universo e mondi*, 1584; executed 1600); Kepler; Fontenelle (*Entretiens sur la pluralité des mondes*, 1686); Huygens (*Cosmotheoros*, 1698); Kant (*Allgemeine Naturgeschichte und Theorie des Himmels*, 1755)"
nineteenth_century = "Whewell-Brewster debate (*Of the Plurality of Worlds*, 1853; *More Worlds Than One*, 1854); Percival Lowell and the Mars canals controversy (late 19th–early 20th c.)"
twentieth_century = "Drake equation (Frank Drake, 1961); SETI Project Ozma (1960) onward; Fermi paradox (Enrico Fermi, c. 1950)"
twenty_first_century = "First exoplanets discovered around pulsar PSR B1257+12 (Wolszczan & Frail, 1992); first around main-sequence star 51 Pegasi b (Mayor & Queloz, 1995; Nobel Prize 2019); Kepler mission (2009–2018); JWST atmospheric biosignature searches (2022 onward); approximately 5,600+ confirmed exoplanets as of 2026"
framework_position = "Foundational rather than optional: the corpus's broader account requires cosmic pluralism — the Elohim came from another world, humanity was synthesised by extraterrestrial intelligence, and humanity is in turn destined to create new humanities on other worlds"
key_source_passage = "Vorilhon (1974): \"Since the beginning of time it has been so: people create other people like themselves on other planets. The cycle continues. Some die, others take over. We are your creators, and you will create other humanities.\""
key_biblical_cross_reference = "Ecclesiastes 3:15 — \"That which hath been is now; and that which is to be hath already been\""
+++

**Cosmic pluralism** is the philosophical and scientific doctrine that the universe contains **many worlds beyond Earth** — and, in its stronger form, **many inhabited worlds**. The doctrine has developed across approximately 2,500 years of philosophical and scientific reflection and has stood, across most of that period, in opposition to the dominant Aristotelian unique-world cosmology that held there to be one world only. The 20th and 21st centuries have seen cosmic pluralism shift from contested philosophical speculation to substantially empirically grounded scientific position: the documented existence of more than **5,600 confirmed exoplanets** as of 2026, the increasing identification of potentially habitable worlds in the *habitable zones* of their host stars, the development of biosignature-detection technologies in space telescopes (JWST and successors), and the continuing programmes of the **Search for Extraterrestrial Intelligence (SETI)** have together moved the question of *whether* there are other worlds from open to settled, leaving the substantive open question as whether the documented other worlds are *inhabited*.

The doctrine should be distinguished from two related but distinct ideas with which it is sometimes conflated. The **quantum many-worlds interpretation** developed by Hugh Everett in 1957 concerns the metaphysics of quantum mechanical measurement and proposes that quantum branching produces multiple "worlds" in a logical-modal rather than cosmological-physical sense; it is a separate doctrine unrelated to cosmic pluralism in the classical sense. The **multiverse cosmologies** of contemporary theoretical physics (eternal inflation, the string-theory landscape, mathematical-platonist multiverse proposals) concern the possible existence of disconnected or causally separated *universes* rather than additional inhabited worlds within our universe; the relationship between these contemporary multiverse cosmologies and classical cosmic pluralism is complex and treated more fully in the dedicated [Multiverse](../multiverse/) entry. The present entry treats cosmic pluralism in its classical sense: the doctrine of multiple worlds within the single physical universe, particularly with attention to the question of inhabitation.

The Wheel of Heaven framework reads cosmic pluralism as **foundational rather than optional** to the corpus's broader account. The framework's central claims — that the Elohim came from another world, that humanity was synthesised by extraterrestrial intelligence approximately 25,000 years ago, that humanity is in turn destined to create new humanities on other worlds — together require cosmic pluralism as a necessary metaphysical and physical commitment. The Raëlian source material's central passage on the topic, from Vorilhon's *Le Livre qui dit la vérité* (1974), formulates the position with particular clarity: "Since the beginning of time it has been so: people create other people like themselves on other planets. The cycle continues. Some die, others take over. We are your creators, and you will create other humanities." The framework's adopted reading treats cosmic pluralism not merely as the empirical doctrine that other inhabited worlds *exist* but as the substantive metaphysical doctrine that *life propagates* across the universe through advanced civilisations creating new life on other worlds — a propagation pattern of which terrestrial humanity is one instance.

## Etymology and conceptual scope

The English term **cosmic pluralism** combines two Greek-derived roots: **κόσμος** (*kosmos*, "ordered world, universe, system") and **pluralism** (Latin *plūrālis*, "of more than one," from *plūs* "more"). The literal sense is "the doctrine that there is more than one *kosmos*" — preserving the deep ancient question of whether the *kosmos* (the ordered totality of existence) is one or many. The Greek philosophical vocabulary used a related term **πολυκοσμία** (*polykosmia*, "many-world-ness") for the doctrine of multiple worlds, contrasted with **μονοκοσμία** (*monokosmia*, "one-world-ness") for the unique-world position.

The English-language phrase "plurality of worlds" (the more common term in 17th–19th-century writing) translates the Latin **pluralitas mundorum** of medieval and early-modern scholastic and natural-philosophical literature. The French **pluralité des mondes** is the form Bernard de Fontenelle popularised in his 1686 *Entretiens*. The German **Pluralität der Welten** appears in Kant and subsequent German philosophical literature.

The substantive scope of cosmic pluralism admits several distinct claims that should be carefully distinguished:

- **Strict multiplicity of worlds.** The claim that the universe contains many worlds (planetary or stellar systems) beyond Earth, independent of whether those worlds are inhabited.
- **Plurality of inhabited worlds.** The claim that some or many of those other worlds are inhabited by life of some kind.
- **Plurality of intelligent worlds.** The stronger claim that some or many of those other worlds are inhabited by intelligent beings comparable to or surpassing humans.
- **Pluralism of communicating civilisations.** The strongest claim that intelligent worlds are or can become engaged in communicative or operational contact with one another.

The Wheel of Heaven framework's adopted position holds all four claims, with the fourth — communicating-civilisation pluralism — as the specifically operational position the corpus develops. The framework reads the historical development of cosmic pluralism in Western thought as the gradual approach to the corpus's adopted position, with the contemporary empirical confirmation of the first claim (strict multiplicity, now established by exoplanet research) understood as one stage in the longer trajectory toward confirmation of the fourth (operational contact, which the corpus reads as already established but not yet generally recognised).

## Historical development in Western thought

The history of cosmic pluralism in Western thought spans approximately two and a half millennia, from the early Greek atomists through the contemporary exoplanet revolution. The development is one of the most substantive philosophical-scientific lineages in the entire Western tradition, with continuity across periods, languages, and theological frameworks substantially greater than is sometimes appreciated.

### Ancient origins: the atomists and Epicurus

The earliest articulation of cosmic pluralism in Western thought is associated with the **Greek atomists**, the school founded by **Leucippus of Miletus** (5th century BCE, fl. c. 440 BCE) and substantially developed by his student **Democritus of Abdera** (c. 460–c. 370 BCE). The atomist position held that all of physical reality consists of indivisible atoms (*atoma*, "uncuttable") and void (*kenon*), with atoms in eternal motion producing the various phenomenal structures of the world. From this physics, the atomists derived the doctrine of *kosmoi apeiroi* — **infinite worlds**: since atoms and void are infinite in extent and the combinations of atoms are unbounded, there must be not one world but indefinitely many. Democritus is reported by Hippolytus and other doxographers as having held that the multiple worlds differ in size, with some larger and some smaller than ours, some without sun or moon, some with multiple suns and moons, some without animal or plant life, some with intelligent inhabitants.

**Epicurus** (341–270 BCE) inherited and systematised the atomist position. His **Letter to Herodotus** (preserved in Diogenes Laertius's *Lives of Eminent Philosophers*, Book X) gives the canonical Epicurean formulation: "There are infinite worlds both like and unlike this world of ours... in some of them there will be living creatures and plants and other things we see in this world." The Epicurean argument from the infinite scale of the universe — that an infinite domain must contain all combinatorially possible arrangements, including innumerable inhabited worlds — is among the earliest examples of what would later be called a *combinatorial-infinity argument* for cosmic pluralism, and remains influential in contemporary discussions.

The Epicurean cosmic pluralism was transmitted to the Latin tradition principally through **Lucretius**'s **De Rerum Natura** ("On the Nature of Things," c. 50 BCE), the Latin didactic poem that preserved Epicurean physics across the centuries when the original Greek texts were largely lost. Book II of *De Rerum Natura* gives the most extensive ancient Latin treatment of cosmic pluralism, with Lucretius arguing that the universe is filled with many worlds whose existence follows from the infinite scale of matter and the universality of the same physical processes that produced Earth.

### Ancient opposition: Aristotle and the unique-world cosmology

The principal ancient opposition to cosmic pluralism came from **Aristotle** (384–322 BCE), whose **De Caelo** ("On the Heavens," c. 350 BCE) presented sustained arguments against the atomist plurality of worlds. The Aristotelian argument depended on his physics: each of the four sublunary elements (earth, water, air, fire) has a *natural place* toward which it moves (earth toward the geometric centre of the universe, fire away from it), and there can be only one centre, hence only one world. The Aristotelian unique-world cosmology became the dominant position in late ancient and medieval Western philosophy through the work of his commentators and through the Christianisation of Aristotelian physics in the high medieval scholastic period.

The **Stoic** school took an intermediate position: the universe contains one *kosmos* at a time, but this *kosmos* undergoes periodic destruction and renewal through cyclic conflagrations (*ekpyrosis*), producing a *sequential* plurality of worlds rather than a *simultaneous* plurality. The Stoic position influenced subsequent eternal-recurrence and cyclic-cosmology traditions.

### Medieval developments: Islamic and Christian

The medieval Islamic philosophical tradition substantially engaged the cosmic pluralism question. The **Mutakallimun** (early Islamic theologians, particularly the Ash'ari school) generally argued for the divine omnipotence to create multiple worlds, even as most held that the actually existing world is one. **Fakhr al-Din al-Razi** (1149–1209) in his Qur'anic commentary engaged the question and explicitly defended the doctrine that God can create multiple worlds. The Islamic philosophical tradition's substantive engagement with cosmic pluralism was one of the channels by which the question entered medieval Christian scholasticism.

The decisive event in medieval Christian engagement with cosmic pluralism is the **1277 Paris Condemnations** of **Étienne Tempier**, the Bishop of Paris. The condemnations listed 219 propositions that Paris theology students were forbidden to hold under pain of excommunication. Among the condemned propositions was the Aristotelian denial of God's power to create multiple worlds — the position that "the First Cause cannot make several worlds" (proposition 34 in the standard enumeration). The condemnation paradoxically opened philosophical space for plurality discussions: while Aristotle had held the unique-world position on physical grounds, Tempier's condemnation established that the theological tradition required holding that God *could* make multiple worlds even if (as a matter of fact) he had not.

The post-1277 Latin scholastic discussion of cosmic pluralism developed substantially. **Jean Buridan** (c. 1300–c. 1358) at Paris discussed the question in his *Questions on the De Caelo*, distinguishing the question of whether God can create multiple worlds (yes, by omnipotence) from the question of whether multiple worlds actually exist (no, on standard Aristotelian-physical grounds). **Nicole Oresme** (c. 1320–1382), Buridan's student, developed the discussion further in his *Le Livre du Ciel et du Monde* (1377), arguing that the standard Aristotelian arguments against plurality were inconclusive and that the question of actual plurality should be left open.

### Nicholas of Cusa and the Renaissance

The first substantive medieval-into-Renaissance Christian defence of cosmic pluralism is **Nicholas of Cusa** (1401–1464), the German cardinal and philosopher whose **De Docta Ignorantia** ("On Learned Ignorance," 1440) developed a cosmology of infinite extent with multiple inhabited worlds. Cusa held that the universe has no fixed centre and no boundary (a position that anticipates Bruno by 150 years), that Earth is not the centre but moves like the other celestial bodies, and that the other stars and planets are inhabited by living and possibly rational beings, each adapted to the specific conditions of its world. Cusa's cosmology was developed within Christian theological orthodoxy and was not condemned during his lifetime; he was made a cardinal by Pope Nicholas V in 1448 and remained in good standing with Rome until his death.

The Cusan defence of cosmic pluralism was substantially influenced by his engagement with Greek atomist sources, by the broader Renaissance recovery of classical Latin and Greek philosophical literature, and by the developing astronomical observations of the period. Cusa's position became one of the principal medieval-Christian sources for Giordano Bruno's subsequent more controversial development.

### Copernicus and the heliocentric revolution

**Nicolaus Copernicus** (1473–1543), the Polish-German Renaissance astronomer, published **De Revolutionibus Orbium Coelestium** ("On the Revolutions of the Celestial Spheres") in 1543, decentering the Earth from the cosmos by proposing that the Earth and the other planets orbit the Sun. The Copernican model itself did not entail cosmic pluralism — Copernicus himself remained largely silent on the question of inhabited other worlds — but the heliocentric model substantially weakened the philosophical-physical basis for the Aristotelian unique-world cosmology. If the Earth was one planet among several orbiting the Sun, the question of whether the other planets might be inhabited acquired new pertinence; and if the other planets *did* host life, the broader question of plurality across other stellar systems acquired new plausibility.

The post-Copernican period of the late 16th and early 17th centuries saw rapid development of cosmic pluralism discussion. **Johannes Kepler** (1571–1630) in his **Somnium** ("The Dream," published posthumously 1634) imagined a journey to the Moon and described possible lunar inhabitants. **Galileo Galilei**'s 1610 telescope discoveries of the Jovian moons, the lunar surface features, and the phases of Venus produced the first observational evidence that the other celestial bodies were physical objects comparable to Earth — opening the question of whether they too might host life.

### Giordano Bruno

**Giordano Bruno** (1548–1600), the Italian philosopher, Dominican friar (until his expulsion from the order in 1576), and cosmological theorist, is the most famous early-modern advocate of cosmic pluralism. Bruno developed his cosmological position across multiple works, principally **De l'infinito universo e mondi** ("On the Infinite Universe and Worlds," 1584) and **De l'immenso** (1591). His central claims:

- The universe is **infinite** in extent, with no boundary and no centre
- The stars are **other suns**, similar in physical nature to our own Sun
- The stars are surrounded by **other planets** comparable to those of our solar system (the doctrine that contemporary astronomy has confirmed in the exoplanet revolution)
- Many of these other worlds are **inhabited** by intelligent beings
- The universe contains **infinitely many** inhabited worlds, with infinitely many stars hosting infinitely many planetary systems

Bruno's position was substantially more radical than that of his contemporaries. While Cusa, Copernicus, and others had held positions with some affinity to cosmic pluralism, Bruno gave the doctrine its most thoroughgoing early-modern formulation, with explicit anticipation of the exoplanet-revolution discoveries of 1992 and 1995. The astronomers of the post-1995 exoplanet period have repeatedly noted that Bruno's specific claim — that the stars are other suns surrounded by their own planets — has now been empirically confirmed in a way that no other early-modern cosmological speculation has been.

Bruno was tried by the Roman Inquisition between 1592 and 1600, and on **17 February 1600** was **burned at the stake at the Campo de' Fiori** in Rome. The historical-academic question of *why* Bruno was condemned is genuinely contested in contemporary scholarship and warrants careful treatment.

The **older scholarly consensus**, represented in the Stanford Encyclopedia of Philosophy and the standard 20th-century treatments, held that Bruno's cosmological views were one factor among several but were not the primary cause of his execution. On this reading, Bruno was condemned principally for theological positions: denial of the Trinity, denial of the deity of Christ (whom Bruno treated as a wise magician rather than incarnate God), denial of the perpetual virginity of Mary, denial of transubstantiation, advocacy of pantheism and metempsychosis (the transmigration of souls), and the view that even Satan would eventually be saved. The cosmological positions, on this older reading, were secondary.

The **revisionist position** has been substantively developed by **Alberto A. Martínez** in his article "Giordano Bruno and the Heresy of Many Worlds" (*Annals of Science* 73, no. 4, 2016: 345–374) and his book *Burned Alive: Bruno, Galileo and the Inquisition* (University of Chicago Press, 2018). Martínez argues from neglected primary sources — Catholic canon-law treatises on heresy, the surviving Inquisition records, the testimony of Bruno's cellmates — that the belief in many worlds was *formally* heretical in late-16th-century Catholic theology and was the primary factor in Bruno's condemnation. On the Martínez reading, the older consensus has substantially understated the cosmological centrality of the trial.

The Wheel of Heaven framework's adopted position on this historical question is neutral: the corpus reads Bruno as the most theoretically significant early-modern advocate of cosmic pluralism regardless of the specific question of which of his positions was decisive in his condemnation. What is clear is that Bruno held cosmic pluralism, defended it across multiple works, and was executed as a heretic during the period of his sustained advocacy of the position. Subsequent generations — particularly the 19th-century European free-thought tradition that erected the Bruno statue at the Campo de' Fiori in 1889 — have read Bruno as a martyr for cosmic pluralism specifically, a reading that may oversimplify the historical-academic question but that has substantively shaped subsequent reception.

### The 17th and 18th centuries

The post-Bruno period saw cosmic pluralism develop into a substantive Enlightenment discussion. **Bernard Le Bovier de Fontenelle** (1657–1757), the French Enlightenment author and secretary of the Académie des Sciences, published **Entretiens sur la pluralité des mondes** ("Conversations on the Plurality of Worlds") in **1686** — a hugely popular work that brought the doctrine to educated lay audiences across Europe in the form of conversations between a philosopher and a marquise in a garden under starlight. The *Entretiens* went through multiple editions, was translated into multiple European languages, and substantially shaped Enlightenment views of the cosmos.

**Christiaan Huygens** (1629–1695), the Dutch astronomer and physicist (also the inventor of the pendulum clock and the discoverer of Saturn's rings and Titan), published **Cosmotheoros** posthumously in **1698**. The work gave a systematic 17th-century treatment of cosmic pluralism, with specific arguments for the inhabitation of the other planets of the solar system and the broader stellar systems. Huygens's position was more cautious than Bruno's — he avoided the claim of infinitely many worlds and remained within Christian theological orthodoxy — but established cosmic pluralism as a mainstream educated position by the early 18th century.

**Immanuel Kant** (1724–1804) in his **Allgemeine Naturgeschichte und Theorie des Himmels** ("Universal Natural History and Theory of the Heavens") of **1755** developed both the **nebular hypothesis** (the proposal that the Sun and planets formed from a contracting cloud of gas and dust — the standard contemporary cosmological model for planetary formation) and a sustained defence of cosmic pluralism. Kant argued that the same physical processes that produced our solar system must have produced other solar systems throughout the universe, each with its own complement of planets and (probably) inhabitants.

### The 19th century: the Whewell-Brewster debate

The 19th century saw the most substantive single Anglophone debate over cosmic pluralism. **William Whewell** (1794–1866), the English polymath, theologian, and Master of Trinity College Cambridge, published anonymously **Of the Plurality of Worlds: An Essay** in **1853**. Whewell's position was unusual for his period: he *opposed* cosmic pluralism, arguing on Christian-theological and scientific grounds that Earth is in fact unique in the universe as the seat of intelligent life. The Whewell position was developed across the *Essay* and his subsequent *Dialogue on the Plurality of Worlds* (1854).

The response was substantial. **David Brewster** (1781–1868), the Scottish physicist and astronomer (best known for Brewster's law in optics), published **More Worlds Than One: The Creed of the Philosopher and the Hope of the Christian** in **1854**, defending cosmic pluralism on both scientific and theological grounds and arguing that Whewell's position was both scientifically untenable and theologically unnecessary. The Whewell-Brewster debate ran through the 1850s and substantially shaped the Anglophone scientific reception of cosmic pluralism. Brewster's position was much more widely shared in the scientific community; Whewell's anti-pluralist position was an outlier within his generation.

### The 19th–20th-century transition: Mars and Lowell

The late 19th and early 20th century saw cosmic pluralism become substantially Mars-focused. The Italian astronomer **Giovanni Schiaparelli** (1835–1910) observed apparent linear features on Mars during the 1877 opposition, calling them *canali* (Italian "channels," subsequently mistranslated into English as "canals" with the implication of artificial construction). The American astronomer **Percival Lowell** (1855–1916) substantially developed the Mars-canals interpretation in his books *Mars* (1895), *Mars and Its Canals* (1906), and *Mars as the Abode of Life* (1908), arguing for a Martian civilisation engaged in massive irrigation engineering on a dying planet. The Lowell programme was substantially the public face of cosmic pluralism in the early 20th century.

The Mars-canals hypothesis was substantially undermined by improved astronomical observations across the 1910s–1960s and definitively disproven by the Mariner 4 spacecraft flyby of Mars in 1965, which returned the first close-up photographs of the Martian surface showing no canals. The subsequent Mariner, Viking, and contemporary Mars missions have confirmed that Mars is not a complexly civilised world (though the question of microbial Mars life remains genuinely open and is one of the principal research questions of contemporary astrobiology).

### The 20th century: SETI and the Drake equation

The mid-20th century saw cosmic pluralism shift from a primarily speculative-philosophical discussion to an experimentally engaged scientific programme. **Project Ozma**, conducted by the American astronomer **Frank Drake** at the National Radio Astronomy Observatory in 1960, was the first systematic radio-astronomical search for signals from extraterrestrial civilisations — listening to the nearby stars **Tau Ceti** and **Epsilon Eridani** at the 1420 MHz hydrogen-line frequency. Project Ozma found no signals but established the methodology that subsequent **SETI** (Search for Extraterrestrial Intelligence) programmes have continued for the subsequent six decades.

The **Drake equation**, formulated by Drake in 1961 at the foundational Green Bank Conference on extraterrestrial intelligence, provides a structured framework for estimating the number of communicating civilisations in the Milky Way galaxy: *N = R\* × f_p × n_e × f_l × f_i × f_c × L*, where the terms represent the rate of star formation, the fraction of stars with planets, the average number of habitable planets per planetary system, the fraction of habitable planets that develop life, the fraction of life-bearing planets that develop intelligence, the fraction of intelligent civilisations that develop detectable communications, and the average lifetime of such civilisations. The Drake equation does not produce a definite answer — most of its terms remain poorly constrained empirically — but provides the structured framework within which cosmic-pluralism discussions have been conducted since 1961. The dedicated [Drake equation](../drake-equation/) entry develops the formula and its components in detail.

The **Fermi paradox** is the corresponding question first articulated by the Italian-American physicist **Enrico Fermi** in 1950 during a casual conversation at Los Alamos: if cosmic pluralism is correct and there should be many communicating civilisations in the galaxy, *where is everybody*? Why have we not detected unambiguous evidence of extraterrestrial civilisations across our nearly 70-year SETI programmes? The Fermi paradox has generated a substantial literature of proposed solutions — civilisations may be rare, may be short-lived, may avoid detection deliberately, may communicate through channels we cannot detect, may have already contacted Earth without our recognition, may be observing without intervention (the "zoo hypothesis"), and many others. The framework's reading of the Fermi paradox is treated in the dedicated [Fermi paradox](../fermi-paradox/) entry and is summarised in the framework section below.

### The 21st century: the exoplanet revolution

The most decisive empirical development in the history of cosmic pluralism is the **exoplanet revolution** that has unfolded since 1992. The principal milestones:

- **1992**: First confirmed exoplanets. **Aleksander Wolszczan** and **Dale Frail** announced the detection of two (subsequently three) planets orbiting the pulsar **PSR B1257+12**, using pulsar-timing measurements. The pulsar-planet detections were surprising — pulsars are the highly compact remnants of supernova explosions, and the planets must have formed after the supernova rather than surviving it — but established that the technical capability to detect exoplanets had been achieved.
- **1995**: First exoplanet around a main-sequence star. **Michel Mayor** and **Didier Queloz** at the University of Geneva announced the detection of **51 Pegasi b**, a Jupiter-mass planet in a 4.23-day orbit around the Sun-like star 51 Pegasi (approximately 50 light-years from Earth). The detection was made using the radial-velocity method with the ELODIE spectrograph at the Observatoire de Haute-Provence. Mayor and Queloz were awarded the 2019 Nobel Prize in Physics for this discovery.
- **1999**: First transiting exoplanet. **HD 209458 b** was detected via the transit method (the periodic dimming of a star as a planet crosses in front of it). The transit method has subsequently become the principal exoplanet-detection methodology.
- **2009–2018**: NASA **Kepler Mission**. The Kepler space telescope, designed specifically for transit-based exoplanet detection, conducted continuous photometric monitoring of approximately 150,000 stars in a fixed field of view in the constellation Cygnus. Kepler identified nearly 5,000 planetary candidates and confirmed more than 2,700 planets, including substantial numbers of small (Earth-radius and below) planets and planets in the habitable zones of their host stars.
- **2018 onward**: NASA **TESS Mission** (Transiting Exoplanet Survey Satellite). The successor survey mission, conducting all-sky transit searches and substantially expanding the catalogue of exoplanet candidates around nearby stars.
- **2022 onward**: **James Webb Space Telescope** atmospheric characterisation. JWST has begun the era of detailed atmospheric characterisation of exoplanets, including the first detection of carbon dioxide in an exoplanet atmosphere (WASP-39 b, 2022), the first detection of methane and other potentially biosignature molecules, and the broader programme of biosignature search.
- **2026**: Approximately **5,600+ confirmed exoplanets** documented in the NASA Exoplanet Archive and other catalogues, including hundreds of potentially habitable-zone candidates. The trajectory of subsequent discovery is expected to continue accelerating with planned successor missions (the European Space Agency's PLATO mission, NASA's Habitable Worlds Observatory).

The exoplanet revolution has confirmed empirically what cosmic pluralism had philosophically defended for 2,500 years: planets around other stars are common, possibly the rule rather than the exception, and the universe is in fact full of other worlds. The substantive open questions — whether any of these other worlds are inhabited, whether any host intelligent life, whether any are or could become engaged in communicative contact — remain genuinely open in mainstream astrobiology.

## In the Wheel of Heaven framework

The Wheel of Heaven framework reads cosmic pluralism as foundational rather than optional to the corpus's broader account. The framework's central claims — that the Elohim came from another world, that humanity was synthesised by extraterrestrial intelligence approximately 25,000 years ago, that humanity is in turn destined to create new humanities on other worlds — together require cosmic pluralism as a necessary metaphysical and physical commitment. The framework's specifically operational reading of cosmic pluralism is substantially stronger than the standard mainstream-scientific position: where mainstream astrobiology treats the existence of other inhabited worlds as a genuinely open empirical question, the framework treats it as a known feature of cosmic reality.

### The Vorilhon source-material formulation

The Raëlian source material's central passage on cosmic pluralism, from Vorilhon's *Le Livre qui dit la vérité* (1974), is one of the most important single passages in the corpus's broader account:

> Since the beginning of time it has been so: people create other people like themselves on other planets. The cycle continues. Some die, others take over. We are your creators, and you will create other humanities:
>
> > *That which hath been is now; and that which is to be hath already been.*
> >
> > — Ecclesiastes 3:15
>
> — Vorilhon, *Le Livre qui dit la vérité* (1974); English in *Message from the Designers*

The passage establishes several substantive framework-relevant claims:

- **The eternal recurrence pattern.** "Since the beginning of time it has been so" — the propagation of life across the universe through advanced civilisations creating new life on other worlds is presented as an eternal pattern with no specific origin point, rather than as a feature of a specific cosmological era. The framework's reading connects this to the broader corpus's engagement with infinity (treated in the dedicated [Infinity](../infinity/) entry).
- **The self-similarity pattern.** "People create other people like themselves" — the framework reads this as the source-material articulation of the broader pattern that connects to the [Pantropy](../pantropy/) entry's treatment of humans as the product of an Elohim pantropic engineering operation. The Elohim, in synthesising humans in their own image, are following the same pattern that their own creators followed in synthesising them, and that humans will eventually follow in synthesising new humanities on other worlds.
- **The cyclic continuity.** "The cycle continues. Some die, others take over." — the framework reads this as preserving content about the long-term continuity of the propagation pattern, with individual civilisations rising and falling but the broader life-propagation process continuing across cosmic time.
- **The reciprocal relationship.** "We are your creators, and you will create other humanities" — the central operational claim. Humanity is positioned within a continuous chain of life-propagation, both as the creation of a prior civilisation (the Elohim) and as the future creator of subsequent civilisations on other worlds. The framework reads this not as eschatological hope but as the operational structure of cosmic reality.
- **The Ecclesiastes 3:15 cross-reference.** The Hebrew Bible's Qoheleth passage — "That which hath been is now; and that which is to be hath already been" — is presented in the source material as the canonical scriptural preservation of the eternal-recurrence pattern. The framework reads the Qoheleth passage as one of the most theologically interesting passages in the Hebrew Bible for the corpus's broader reading: a wisdom-tradition formulation of the eternal-pattern doctrine that the Raëlian source material treats as fundamental to cosmic reality.

### The chain of life

The framework's reading of cosmic pluralism connects directly to the corpus's broader concept of the **chain of life** (sometimes formulated as the "chain of creation" or the "chain of humanities"). The framework's adopted position is that:

- **The Elohim were themselves created** by an earlier civilisation. The Vorilhon source material includes the explicit statement that the Elohim, like humans, were synthesised by a prior intelligence — they are not first or eternal but are themselves products of the broader cosmic-pluralism propagation pattern.
- **Humans are the latest link in the chain.** Terrestrial humanity is the most recent (or one of the most recent) instances of the propagation pattern, with the Elohim having synthesised humans in their image approximately 25,000 years ago on the framework's reading.
- **Humanity will continue the chain.** The framework's adopted position is that humanity's eventual development of the operational capabilities — the synthesis biology, the synthesis genomics, the broader life-engineering technologies treated in the corresponding corpus entries — is not a divergence from the cosmic pattern but the recapitulation and continuation of it. The contemporary humanity that is acquiring CRISPR, synthetic genomes, terraforming concepts, and broader operational technologies is preparing to take up the role its creators played for it.
- **The chain extends both backward and forward.** The chain has no first link (the chain extends backward indefinitely, with each civilisation having been created by an earlier one) and has no last link (each civilisation creates the next). The cosmic pluralism the framework reads is thus not merely synchronic (many inhabited worlds *now*) but diachronic (many inhabited worlds *across time*) and structurally connected (the worlds are linked through the propagation pattern rather than being independent occurrences).

The chain-of-life doctrine is one of the principal substantive metaphysical commitments of the corpus's broader interpretive framework. The dedicated [Chain of life](../chain-of-life/) entry develops the doctrine more fully; the present entry establishes the cosmic-pluralism foundation on which the chain-of-life doctrine depends.

### The framework's reading of the Fermi paradox

The framework's reading of the Fermi paradox differs substantially from the standard mainstream-scientific positions. The framework's adopted position is that the Fermi question — "where is everybody?" — has already been answered: the Elohim *are* here, *have been* here across the duration of human history, and have engaged in repeated operational contact with selected human figures (the prophetic record the corpus catalogues across multiple entries). The Fermi paradox, on the framework's reading, is not a paradox but a recognition problem: the empirical evidence for extraterrestrial engagement is present in the form of the broader prophetic record, the operational contact events catalogued in the [List of close encounters](../list-of-close-encounters/), the archaeoastronomical record of the megalithic sites, and the broader source-material content. What is needed is not new SETI signal-detection but the operational interpretation of the evidence already available.

This reading does not require the framework to reject the value of contemporary SETI programmes or exoplanet research; both are valuable extensions of empirical engagement with cosmic pluralism. But the framework's adopted position is that the substantive question of whether the universe contains other inhabited and intelligent civilisations is not still open — it is empirically settled by the prophetic-record and operational-contact evidence — and that the contemporary SETI programmes are working to confirm what the corpus reads as already established.

### Contemporary recognition

The framework reads the contemporary exoplanet revolution and the broader scientific shift toward seeing cosmic pluralism as the default rather than the contested position as a recognition pattern. The mainstream scientific community is recovering — empirically, gradually — what the prophetic and operational record has preserved across the broader human history. The corpus's broader position is that this recognition will continue and will eventually include not just the empirical confirmation of other inhabited worlds (which the framework expects within the 21st century) but the broader operational recognition of the prior contact with Earth and the broader propagation pattern. The dedicated [Age of Apocalypse](../age-of-apocalypse/) entry develops the broader framework reading of the post-1945 period as the recovery and recognition phase.

## Connections to the broader framework

The Cosmic pluralism entry connects to a substantial number of other corpus entries.

**The Elohim.** The dedicated [Elohim](../elohim/) entry treats the corpus's central claim about the non-terrestrial civilisation that engaged with Earth; cosmic pluralism is the foundational metaphysical-physical commitment on which the Elohim doctrine depends.

**Pantropy.** The dedicated [Pantropy](../pantropy/) entry treats the framework's reading of humans as the product of an Elohim pantropic engineering operation. The Vorilhon "people create other people like themselves on other planets" formulation is the cosmic-pluralism articulation of the pantropy pattern.

**Life engineering, synthetic biology, synthetic genomics.** The dedicated [Life engineering](../life-engineering/), [Synthetic biology](../synthetic-biology/), and [Synthetic genomics](../synthetic-genomics/) entries treat the technical-scientific recovery of the operational capabilities required for humans to eventually create life on other worlds. Cosmic pluralism is the framework within which these technical capabilities have their broader meaning.

**The chain of life.** The dedicated [Chain of life](../chain-of-life/) entry treats the broader metaphysical doctrine of life-propagation across cosmic time. Cosmic pluralism is the spatial-cosmological foundation on which the chain-of-life doctrine depends.

**The Drake equation.** The dedicated [Drake equation](../drake-equation/) entry treats the standard mainstream-scientific formula for estimating the number of communicating civilisations in the galaxy. The framework reads the Drake equation as a useful structured framework whose terms can be substantively constrained by the corpus's broader operational reading.

**The Fermi paradox.** The dedicated [Fermi paradox](../fermi-paradox/) entry treats the apparent contradiction between the cosmic-pluralism expectation of many civilisations and the absence of unambiguous SETI detections. The framework's reading is that the paradox is resolved by the recognition of prior contact rather than by demographic arguments against pluralism.

**Astrobiology.** The dedicated [Astrobiology](../astrobiology/) entry treats the contemporary scientific field studying the conditions for life beyond Earth and the methods of biosignature detection. Cosmic pluralism is the broader interpretive frame within which astrobiology operates.

**Plurality of gods.** The dedicated [Plurality of gods](../plurality-of-gods/) entry treats the framework's reading of the polytheistic religious traditions as preserving operational content about multiple Elohim agents rather than as theologically erroneous departures from monotheism. The connection to cosmic pluralism is conceptual: just as the universe contains plural worlds, the operational engagement with humanity has involved plural agents.

**Infinity.** The dedicated [Infinity](../infinity/) entry treats the corpus's broader engagement with the infinite — both spatial (cosmic pluralism extended to infinite scale) and temporal (eternal recurrence and propagation). The Ecclesiastes 3:15 passage cross-referenced in the Vorilhon source material is one of the principal source-tradition formulations.

**The Age of Apocalypse.** The dedicated [Age of Apocalypse](../age-of-apocalypse/) entry treats the post-1945 period as the recovery and recognition phase of the broader cosmic engagement. The contemporary scientific shift toward cosmic pluralism as the default position is one of the markers of the recognition phase.

## Open questions

The Cosmic pluralism entry surfaces several open questions for the framework's broader interpretive work.

- **The empirical confirmation timeline.** The framework's adopted position expects empirical confirmation of inhabited other worlds within the 21st century. The specific timeline depends on multiple factors (the development of biosignature-detection technologies, the development of more advanced SETI programmes, the broader scientific recognition of existing evidence) and is treated as open.
- **The relationship between mainstream SETI and the framework's reading.** The framework reads contemporary SETI as valuable but possibly unnecessary given the existing prophetic-record and operational-contact evidence. The relationship between SETI work and the framework's broader interpretive programme is treated as open — the two enterprises are not in opposition, but their relationship is not yet fully developed.
- **The specific status of the chain-of-life origin question.** The framework's adopted position is that the chain of life-propagation has no first link — the chain extends backward indefinitely. This is a substantive metaphysical commitment that requires further development; the relationship between the framework's eternal-chain position and the standard cosmological accounts of the universe's origin (the Big Bang, the inflationary era) is treated as open.
- **The historical-academic question of Bruno's trial.** The contested scholarly question of whether Bruno's cosmological views were the primary factor in his condemnation (the Martínez position) or one factor among several (the older consensus) is genuinely open in contemporary scholarship. The framework's reading is neutral on this specific historical question.
- **The relationship between cosmic pluralism and the multiverse cosmologies of contemporary theoretical physics.** Whether the framework's classical cosmic pluralism connects substantively to the contemporary multiverse proposals (eternal inflation, the string-theory landscape, etc.) or whether these are unrelated doctrines that should be kept conceptually separate is treated as open. The dedicated [Multiverse](../multiverse/) entry will develop the question more fully.

## See also

- [Elohim](../elohim/)
- [Pantropy](../pantropy/)
- [Life engineering](../life-engineering/)
- [Synthetic biology](../synthetic-biology/)
- [Synthetic genomics](../synthetic-genomics/)
- [Terraforming](../terraforming/)
- [Astrobiology](../astrobiology/)
- [Drake equation](../drake-equation/)
- [Fermi paradox](../fermi-paradox/)
- [SETI](../seti/)
- [Chain of life](../chain-of-life/)
- [Plurality of gods](../plurality-of-gods/)
- [Infinity](../infinity/)
- [Multiverse](../multiverse/)
- [Age of Apocalypse](../age-of-apocalypse/)
- [Raëlism](../raelism/)
- [List of exegetic readings](../list-of-exegetic-readings/)
- [List of close encounters](../list-of-close-encounters/)

## External links

- [Cosmic pluralism | Wikipedia](https://en.wikipedia.org/wiki/Cosmic_pluralism)
- [Pluralistic cosmologies | Britannica](https://www.britannica.com/topic/Western-philosophy/Pluralistic-cosmologies)
- [The Plurality of Worlds | Stanford Encyclopedia of Philosophy](https://plato.stanford.edu/entries/cosmology/)
- [Exoplanet Archive | NASA](https://exoplanetarchive.ipac.caltech.edu/)

## References

Vorilhon, Claude (Raël). *Le Livre qui dit la vérité* (1974) and *Les extra-terrestres m'ont emmené sur leur planète* (1976), collected as *Message from the Designers* (Raëlian Foundation, current English edition). [Primary source for the framework's reading of cosmic pluralism as foundational to the broader Elohim project.]

Lucretius. *De Rerum Natura* ("On the Nature of Things"). c. 50 BCE. Standard English translation: *On the Nature of Things*, translated by Martin Ferguson Smith. Hackett, 2001. [The principal ancient Latin source for Epicurean cosmic pluralism.]

Diogenes Laertius. *Lives of Eminent Philosophers*, Book X (containing the *Letter to Herodotus* and the *Principal Doctrines* of Epicurus). c. 3rd century CE. [The principal ancient Greek source for Epicurean cosmic pluralism.]

Aristotle. *De Caelo* ("On the Heavens"). c. 350 BCE. Standard English translation: *On the Heavens*, translated by W. K. C. Guthrie. Loeb Classical Library, 1939. [The principal ancient source for the unique-world cosmology to which cosmic pluralism is opposed.]

Cusa, Nicholas of. *De Docta Ignorantia* ("On Learned Ignorance"). 1440. Standard English translation: *On Learned Ignorance*, translated by Jasper Hopkins. The Arthur J. Banning Press, 1981. [The principal early Renaissance Christian defence of cosmic pluralism.]

Copernicus, Nicolaus. *De Revolutionibus Orbium Coelestium*. Nuremberg, 1543.

Bruno, Giordano. *De l'infinito universo e mondi*. London, 1584. English translation: *On the Infinite Universe and Worlds*, in *Giordano Bruno: Cause, Principle and Unity, and Essays on Magic*, translated by Richard J. Blackwell and Robert de Lucca. Cambridge University Press, 1998.

Bruno, Giordano. *De l'immenso*. Frankfurt, 1591.

Fontenelle, Bernard Le Bovier de. *Entretiens sur la pluralité des mondes*. Paris, 1686. English translation: *Conversations on the Plurality of Worlds*, translated by H. A. Hargreaves. University of California Press, 1990.

Huygens, Christiaan. *Cosmotheoros*. The Hague, 1698 (posthumous). English translation: *The Celestial Worlds Discover'd*, London, 1698.

Kant, Immanuel. *Allgemeine Naturgeschichte und Theorie des Himmels*. Königsberg, 1755. English translation: *Universal Natural History and Theory of the Heavens*, translated by Olaf Reinhardt, in *Natural Science*, edited by Eric Watkins. Cambridge University Press, 2012.

Whewell, William. *Of the Plurality of Worlds: An Essay*. London: John W. Parker, 1853.

Brewster, David. *More Worlds Than One: The Creed of the Philosopher and the Hope of the Christian*. London: John Murray, 1854.

Lowell, Percival. *Mars*. Boston: Houghton, Mifflin, 1895.

Lowell, Percival. *Mars and Its Canals*. New York: Macmillan, 1906.

Drake, Frank D. "Project Ozma." *Physics Today* 14, no. 4 (1961): 40–46.

Cocconi, Giuseppe, and Philip Morrison. "Searching for Interstellar Communications." *Nature* 184, no. 4690 (1959): 844–846. [The foundational paper proposing radio-frequency SETI.]

Sagan, Carl. *The Cosmic Connection: An Extraterrestrial Perspective*. Doubleday, 1973.

Sagan, Carl, and I. S. Shklovskii. *Intelligent Life in the Universe*. Holden-Day, 1966.

Wolszczan, Aleksander, and Dale A. Frail. "A planetary system around the millisecond pulsar PSR 1257+12." *Nature* 355, no. 6356 (1992): 145–147. [Foundational paper announcing the first confirmed exoplanets.]

Mayor, Michel, and Didier Queloz. "A Jupiter-mass companion to a solar-type star." *Nature* 378, no. 6555 (1995): 355–359. [Foundational paper announcing 51 Pegasi b, the first exoplanet around a main-sequence star; the basis for the 2019 Nobel Prize in Physics.]

Borucki, William J., et al. "Kepler Mission Design, Realized Photometric Performance, and Early Science." *The Astrophysical Journal Letters* 713, no. 2 (2010): L79–L86.

Dick, Steven J. *Plurality of Worlds: The Origins of the Extraterrestrial Life Debate from Democritus to Kant*. Cambridge University Press, 1982. [The principal contemporary scholarly history of cosmic pluralism through the 18th century.]

Crowe, Michael J. *The Extraterrestrial Life Debate, 1750–1900: The Idea of a Plurality of Worlds from Kant to Lowell*. Cambridge University Press, 1986. [The principal contemporary scholarly history of cosmic pluralism in the 19th century.]

Crowe, Michael J. *The Extraterrestrial Life Debate, Antiquity to 1915: A Source Book*. University of Notre Dame Press, 2008.

Martínez, Alberto A. "Giordano Bruno and the heresy of many worlds." *Annals of Science* 73, no. 4 (2016): 345–374. [The principal contemporary revisionist treatment of the Bruno trial, arguing that the cosmological position was the primary factor in his condemnation.]

Martínez, Alberto A. *Burned Alive: Bruno, Galileo and the Inquisition*. Reaktion Books / University of Chicago Press, 2018.

Webb, Stephen. *If the Universe Is Teeming with Aliens... Where Is Everybody? Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life*. 2nd ed. Springer, 2015. [The principal contemporary survey of proposed Fermi paradox solutions.]

Ćirković, Milan M. *The Great Silence: Science and Philosophy of Fermi's Paradox*. Oxford University Press, 2018.

Sendy, Jean. *La Lune, clé de la Bible*. Julliard, 1968. [The principal philological-historiographic engagement with cosmic-pluralism material in the Hebrew Bible within the broader neo-euhemerist tradition.]

Sendy, Jean. *Ces dieux qui firent le ciel et la terre*. Robert Laffont, 1969.

"Cosmic pluralism." *Wikipedia*. <https://en.wikipedia.org/wiki/Cosmic_pluralism>

"Giordano Bruno." *Wikipedia*. <https://en.wikipedia.org/wiki/Giordano_Bruno>

"51 Pegasi b." *Wikipedia*. <https://en.wikipedia.org/wiki/51_Pegasi_b>

"Drake equation." *Wikipedia*. <https://en.wikipedia.org/wiki/Drake_equation>

"Fermi paradox." *Wikipedia*. <https://en.wikipedia.org/wiki/Fermi_paradox>

"Exoplanet." *Wikipedia*. <https://en.wikipedia.org/wiki/Exoplanet>