Cosmological Natural Selection Simulator

Lee Smolin & Clément Vidal — tune your universe's physical constants and watch how black hole production, and universe reproduction, changes

✦ Speculative cosmological framework ⚠ Theoretical physics (fine-tuning)

Epistemic note. Cosmological Natural Selection (Smolin 1992) and Cosmological Artificial Selection (Vidal 2014) are speculative frameworks — creative and published, but not accepted consensus. The fitness landscape below uses a toy model that captures qualitative behaviour only. Physical constant values and their effects on BH production involve significant uncertainties not captured by a simplified calculation. Do not treat the numerical outputs as predictions.

Physical Constants

Adjust each constant as a ratio relative to our universe (1.0 = our value). The model estimates how black hole production and life viability change.

G ×1.00

Gravitational constant

÷100÷10Our G×10×100

Nominal star formation

α ×1.00

Fine structure constant (~1/137)

÷100÷10Our α×10×100

Stable atoms, stellar fusion

Λ ×1.00

Cosmological constant (dark energy)

÷100÷10Our Λ×10×100

Galaxy formation proceeds

m_p/m_e ×1.00

Proton-to-electron mass ratio (~1836)

÷100÷10Our ratio×10×100

Chemistry is possible

CNS Fitness — Black Hole Production (relative to our universe)

Sterile (no BHs)Our universeHyper-fecund (toy model)

1.0×

This universe matches our own physical constants. According to Smolin's CNS framework, our universe's constants sit near a local optimum for black hole production — neither too strongly gravitating nor too weakly bound to form massive stars.

Life & Structure Viability

Whether key physical processes are possible at these constant values. Toy model — qualitative only.

⚛

Stable atoms

Yes

☀

Stars form

Yes

◉

BHs produced

Yes

🌌

Galaxies form

Yes

🧬

Life viable

Possible

🧠

CAS possible

Possible

BH Production Estimates

Relative to our universe — toy model, qualitative only

Stellar BH rate

1.0×

Collapse of massive stars (≥25 M☉)

Galaxy formation

1.0×

Gravitational collapse to supermassive BHs

Universe progeny

~1.0×

Smolin: offspring universes per cosmic cycle

CAS leverage

Standard

Vidal: intelligence-guided selection pressure

Omega Centauri's IMBH as a CNS Node

In Smolin's framework, every black hole seeds a new universe. Omega Centauri's candidate IMBH — with mass currently constrained between ≥8,200 M☉ (Häberle 2024) and ≤6,000 M☉ (Bañares 2025) — represents a single node in this cosmic reproduction chain. In Vidal's extension, Cosmological Artificial Selection (CAS), an intelligence sufficiently advanced to influence the parameters of a collapsing black hole could bias which universes get produced — selecting for universes conducive to further intelligence and further BH production. Under this framework, the Fermi Paradox finds a different kind of resolution: advanced civilisations are not silent because they have died or transcended, but because their most significant work happens at the interior of a black hole — outside causal contact with our universe.

This is the complementary narrative to the Transcension Hypothesis: transcension and CAS both predict that the most powerful civilisational acts occur at or inside a black hole event horizon. See also: STEM Compression Explorer.

What this tool does

This tool operationalises Lee Smolin's Cosmological Natural Selection (CNS) hypothesis through a toy fitness model. You tune the four physical constants most critical for star and black hole formation — the gravitational constant G, the fine structure constant α, the cosmological constant Λ, and the proton-to-electron mass ratio — and observe how the estimated black hole production rate changes relative to our universe.

The fitness function is a simplified product of Gaussian-like factors, each capturing the qualitative effect of each constant on BH production. It is explicitly a toy model; real fine-tuning calculations require full stellar evolution models, nuclear physics codes, and many more parameters.

Vidal's extension — Cosmological Artificial Selection — posits that intelligence could in principle influence which universes get "selected" by guiding the parameters of collapsing black holes. The "CAS leverage" indicator reflects whether this universe has conditions that would allow complex life to reach that level of technological sophistication.

Epistemic status

Cosmological Natural Selection (Smolin 1992, 1997) is a falsifiable scientific hypothesis — Smolin identifies predictions it makes about stellar mass limits that are consistent with observation. However, it is not widely accepted as the correct explanation for the universe's apparent fine-tuning, and it competes with other frameworks (anthropic reasoning, string landscape, etc.). Vidal's CAS is a philosophical/speculative extension.

Physical reasoning behind each constant

G (gravitational constant): Too weak → gas clouds don't collapse → no stars, no BHs. Too strong → the universe collapses on short timescales before stars can form or explode.
α (fine structure constant): Controls electromagnetic force. Too low → electrons not bound to nuclei → no atoms or chemistry. Too high → nuclear repulsion prevents fusion in stars → no stellar evolution, few massive stars, few BHs.
Λ (cosmological constant): Controls expansion rate. Too large → universe expands too rapidly for matter to clump into galaxies and stars. Too negative → universe recollapses before structure forms.
m_p/m_e (mass ratio): Affects nuclear and atomic physics. Our value ~1836 enables the chemistry of life and the nuclear physics of stellar nucleosynthesis.

Data sources & citations

Smolin, L. (1992). "Did the universe evolve?" Classical and Quantum Gravity 9:173–191. DOI: 10.1088/0264-9381/9/1/016 Smolin, L. (1997). The Life of the Cosmos. Oxford University Press. ISBN 978-0-19-512664-5. Vidal, C. (2014). The Beginning and the End: The Meaning of Life in a Cosmological Perspective. Springer. ISBN 978-3-319-05061-4 Vidal, C. (2016). "Stellivore extraterrestrials? Binary stars as living systems." Acta Astronautica 128:251–256. DOI: 10.1016/j.actaastro.2016.06.038 Vidal, C. (2008). "The Future of Scientific Simulations: From Artificial Life to Artificial Cosmogenesis." In Death And Anti-Death, vol. 6. Ria University Press. arXiv:0803.1087 Vidal, C. (2013). "Artificial Cosmogenesis: A New Kind of Cosmology." In Irreducibility and Computational Equivalence: 10 Years After A New Kind of Science, ed. H. Zenil, pp. 157–182. Springer. DOI: 10.1007/978-3-642-35482-3_13 / arXiv:1205.1407 Smart, J. M. (2012). "The transcension hypothesis: Sufficiently advanced civilizations invariably leave our universe, and implications for METI and SETI." Acta Astronautica 78:55–68. DOI: 10.1016/j.actaastro.2011.11.006 Stenger, V. J. (2011). The Fallacy of Fine-Tuning: Why the Universe Is Not Designed for Us. Prometheus Books. ISBN 978-1-61614-443-2. (Primary source for the MonkeyGod simulation — random sampling of physical constants to test fine-tuning claims.) Tegmark, M. et al. (2006). "Dimensionless constants, cosmology and other dark matters." Phys. Rev. D 73:023505. DOI: 10.1103/PhysRevD.73.023505 Häberle et al. (2024). Nature 631:285. DOI: 10.1038/s41586-024-07511-z — OC IMBH lower bound ≥8,200 M☉ Bañares-Hernández et al. (2025). A&A 693:A104. DOI: 10.1051/0004-6361/202451763 — OC IMBH upper bound ≤6,000 M☉

Tool content may be revised as scientific knowledge evolves. v1.0 — 2026-05-24.

Cosmological Natural Selection Simulator

What this tool does

Epistemic status

Physical reasoning behind each constant

Data sources & citations

Companion tools