The Copernican Principle of Consciousness

Historically, the Copernican revolution proved that Earth is not the physical center of the universe. Philosophers Eric Schwitzgebel and Marilu Pober argue for a “Copernican principle of consciousness.”This concept states that treating Earth-based, carbon-based biochemical architecture as the only viable home for awareness is an unjustified bias known as terrocentrism. If the universe contains billions of galaxies and diverse environments, assuming only our specific neural framework can spark consciousness is statistically and logically highly improbable.

Here’s a question that sounds like science fiction but is being asked in deadly earnest by serious philosophers. Does consciousness require flesh and blood? It’s a question I wrestled with myself when I wrote a novel that addresses the very nature of consciousness in the universe, so a new paper claiming the answer is almost certainly no caught my eye at once. That’s the conclusion of Eric Schwitzgebel, a distinguished professor of philosophy at the University of California, Riverside.

In the new working paper written with former UCR graduate student Jeremy Pober, now at the University of Lisbon, the pair argue that consciousness could arise in life forms built from radically different stuff than us. Picture the rock skinned, crystal brained alien from the recent film Project Hail Mary, and you are somewhere close to what they have in mind.

Voyager 1’s view of Earth from 3.7 billion miles, a pale blue speck in a sunbeam. If we’re not central to the universe, the philosophers ask, why assume consciousness is ours alone?

It’s interesting to then apply this to the size of the observable universe that holds something like a trillion galaxies, and planets are believed to be everywhere. The authors estimate, conservatively, that at least a thousand behaviourally sophisticated civilisations have existed somewhere in the history of the cosmos. If life can take hold under wildly different chemical conditions, across that many opportunities, it would be very odd if every successful lineage settled on exactly the same biochemical recipe.

Substrate Flexibility

A core argument against human exclusivity is substrate flexible properties

The Concept: A property is substrate flexible if it can be achieved using entirely different physical materials

Examples: A cup holds liquid whether it is molded from plastic or blown from glass. Music retains its qualitative data whether it is pressed into physical vinyl or stored digitally on a cloud server. 

Application: Consciousness may act the same way. It could be a functional state generated whenever any physical system—biological or mechanical—reaches the necessary threshold of evolutionary or structural complexity

Panpsychism and Alternate Frameworks

Other prominent theories push the boundaries of consciousness completely outside the human skull:

• Panpsychism: This view, championed by contemporary philosophers like Philip Goff, suggests that consciousness is a fundamental, intrinsic building block of the physical universe, akin to mass or electrical charge. Rather than being a magical byproduct of the human brain, our awareness is simply a highly complex, evolved manifestation of a property that exists at every scale of matter. 

Non-Human Consciousness: Biologists and ethicists increasingly recognize that complex behaviors in animals show they experience pain, intent, and sensory awareness without needing human-like self-consciousness or language

While researchers stop short of claiming current artificial intelligence is conscious, the underlying philosophy makes it clear: consciousness is about structural complexity and the immediacy of experience, not the biological identity of the machine housing it

The Copernican Principle of Consciousness

The Copernican principle in astronomy states that Earth does not occupy a special, privileged center in the universe. When applied to cognitive science by philosophers like Eric Schwitzgebel and Jeremy Pober, it suggests that human brains do not hold a monopoly on subjective experience

Convergent Evolution

On Earth, consciousness did not evolve just once. Distinct evolutionary branches—such as mammals (humans, elephants, whales) and cephalopods (octopuses)—developed highly sophisticated nervous systems, problem-solving skills, and unmistakable signs of sentience. Because the pressure to perceive, navigate, and survive an environment forces organisms to develop complex information processing, subjective experience is likely a universal evolutionary solution rather than an Earth-specific anomaly. 

Summary Checklist for Alien Consciousness

• 🌌 Vast Cosmos: Billions of habitable exoplanets mean billions of chances for life to spark.
• 🧬 Substrate Independence: Neurons aren’t required; any complex processing system can achieve awareness.
• 🐙 Convergent Nature: Nature repeatedly evolves intelligence and awareness to solve survival problems.
• 👁️ The Copernican Rule: Earth’s biological mechanics are likely ordinary, not a cosmic exception. 

Yes, alien life could potentially exist in the direction of the Orion constellation, as astronomers have discovered multiple planets orbiting its stars. However, it is important to clarify what “in the Orion constellation” means from an astronomical perspective

Intelligent aliens, if they exist in the galaxy or the Universe, might be detectable from a variety of signals: electromagnetic, from planet modification, or because they’re spacefaring. But we haven’t found any evidence for an inhabited alien planet so far. We may truly be alone in the Universe, but the honest answer is we don’t know enough about the relevant probability to say so.

Is there intelligent life out there in the Milky Way beyond our own Solar System? If so, how many alien civilizations are there presently within our own galaxy, and how far away is the closest one? It’s a question that’s mystified humanity for as long as we’ve looked up at the stars and wondered about perhaps the greatest of all the existential questions we could possibly ask, “are we alone?”

Although we’ve come very far in our understanding of stars, planets, and what’s out there — in our Milky Way and beyond — we still don’t know whether there’s any form of extraterrestrial life in the Universe, much less intelligent aliens. And yet, a new study just claimed that there are 36 alien civilizations in the Milky Way, and represent it as a lower limit on what’s out there.

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