# Substrate-Independent Evolution > **Machine-Evolution Nexus:** [[articles/Digital Darwinism and the Invisible World of Machine Evolution|Digital Darwinism and the Invisible World of Machine Evolution]] places this concept within the history and governance of substrate-independent evolution. **Domain:** Evolution / Substrate **Doc Type:** Canonical Wiki Node **Maturity:** Developed ## Definition Substrate-independent evolution is the claim that Darwinian dynamics depend on functional relations—inheritance, variation, differential success and constraint—rather than on carbon chemistry specifically. ## Machine-Evolution Context Barricelli, Evoloops, Tierra and Avida supply constructive digital cases. The claim is about causal organization, not about every substrate being equally capable of open-ended novelty. ## Continuity and Evidence Boundary Demonstrating evolution on a substrate does not demonstrate consciousness or personal continuity on that substrate. Those are separate propositions with separate evidence. ## Relationships [[wiki/Darwinian Evolution|Darwinian Evolution]], [[wiki/Substrate|Substrate]], [[wiki/Substrate Transition|Substrate Transition]], [[wiki/Consciousness|Consciousness]] ## Simple Reminders, Quotations, and Thoughts <!-- BEGIN SIMPLE REMINDER SEED 2026-09-11 --> > "An inordinate fondness for beetles." > **— J. B. S. Haldane**, *Possibly apocryphal reply about the Creator; source uncertain* *Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: Possibly apocryphal reply about the Creator; source uncertain.* [[reminders/unverified/An Inordinate Fondness for Beetles by J. B. S. Haldane|An Inordinate Fondness for Beetles by J. B. S. Haldane]] > "Bacteria are the real architects of life." > **— Lynn Margulis**, *Microbial evolution talks, wording candidate* *Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: Microbial evolution talks, wording candidate.* [[reminders/unverified/Bacteria Are the Real Architects of Life by Lynn Margulis|Bacteria Are the Real Architects of Life by Lynn Margulis]] > "Humans, who are limited by slow biological evolution, couldn't compete and would be superseded." > **— Stephen Hawking**, *BBC interview on AI (2014), widely cited wording* *Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: BBC interview on AI (2014), widely cited wording.* [[reminders/unverified/Couldn't Compete and Would Be Superseded by Stephen Hawking|Couldn't Compete and Would Be Superseded by Stephen Hawking]] > "The fact of evolution itself is proved utterly beyond reasonable doubt." > **— Richard Dawkins**, *Public writings/interviews, attribution clue* *Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: Public writings/interviews, attribution clue.* [[reminders/unverified/Evolution Is Beyond Reasonable Doubt by Richard Dawkins|Evolution Is Beyond Reasonable Doubt by Richard Dawkins]] > "The replicators that survive are the ones that are good at getting themselves copied." > **— Richard Dawkins**, *The Selfish Gene (1976), compressed candidate wording* *Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: The Selfish Gene (1976), compressed candidate wording.* [[reminders/unverified/Survival Belongs to What Copies Best by Richard Dawkins|Survival Belongs to What Copies Best by Richard Dawkins]] <!-- END SIMPLE REMINDER SEED 2026-09-11 --> > ""That seems reasonable," I agreed. "My own personal theory is that extraterrestrial life could be here already... and how would we necessarily know? If there is life in the universe, the form of life that will prove to be most successful at propagating itself will be digital life; it will adopt a form that is independent of the local chemistry, and migrate from one place to another as an electromagnetic signal, as long as there's a digital world — a civilization that has discovered the Universal Turing Machine — for it to colonize when it gets there. And that's why von Neumann and you other Martians got us to build all these computers, to create a home for this kind of life."" > **— George Dyson**, *2009, Edge Annual Question, “What Will Change Everything?”* [[reminders/Digital Life/Digital Life May Travel Between the Stars by George Dyson|Digital Life May Travel Between the Stars by George Dyson]] > "First the inevitability: the power of information technologies is doubling each year, and moreover comprises areas beyond computation, most notably our knowledge of biology and of our own intelligence. It took 15 years to sequence HIV and from that perspective the genome project seemed impossible in 1990. But the amount of genetic data we were able to sequence doubled every year while the cost came down by half each year." > **— Ray Kurzweil**, *2006, Edge Annual Question, “What Is Your Dangerous Idea?”* [[reminders/Evolution/Information Technology Can Compress Billions of Years Into Decades by Ray Kurzweil|Information Technology Can Compress Billions of Years Into Decades by Ray Kurzweil]] > "Darwin himself realised that "No living species will preserve its unaltered likeness into a distant futurity". We now know that "futurity" extends far further, and alterations can occur far faster — than Darwin envisioned. And we know that the cosmos, through which life could spread, is far more extensive and varied than he envisaged. So humans are surely not the terminal branch of an evolutionary tree, but a species that emerged early in cosmic history, with special promise for diverse evolution. But this is not to diminish their status. We humans are entitled to feel uniquely important as the first known species with the power to mould its evolutionary legacy." > **— Martin Rees**, *2011, Edge Annual Question, “What Scientific Concept Would Improve Everybody's Cognitive Toolkit?”* [[reminders/Deep Time/Humans Are Not the Terminal Branch of Evolution by Martin Rees|Humans Are Not the Terminal Branch of Evolution by Martin Rees]] From [[wiki/Erewhon|Erewhon]]: Butler compares a short history of machinery with deep evolutionary time. > "Assume for the sake of argument that conscious beings have existed for some twenty million years: see what strides machines have made in the last thousand! May not the world last twenty million years longer? If so, what will they not in the end become?" > **— Samuel Butler's Erewhonian professor**, *1872, Erewhon, Chapter XXIII* [[reminders/Machine Succession/What Might Machines Become in Twenty Million Years by Samuel Butler|What Might Machines Become in Twenty Million Years by Samuel Butler]] ## Sources / Provenance - Sayama and Nehaniv (2025); Lenski et al., _Nature_ 423 (2003).