Philosophers Argue Consciousness Could Span 10^18 Alien Worlds, Not Just Earth Biology
Updated
Updated · Sci.News · Jun 17
Philosophers Argue Consciousness Could Span 10^18 Alien Worlds, Not Just Earth Biology
2 articles · Updated · Sci.News · Jun 17
Summary
Eric Schwitzgebel and Jeremy Pober argue consciousness is “substrate flexible,” meaning it could arise in physical media far beyond Earth’s animal biology.
Their case rests on scale and diversity: with about 1 trillion galaxies and an estimated quintillion qualifying planets over cosmic history, they say many behaviorally sophisticated species likely evolved on non-Earthlike chemistries.
The paper invokes a “Copernican Principle of Consciousness,” arguing it is unjustified “terrocentrism” to assume inner experience belongs only to organisms built from our particular biochemistry.
On AI, the authors split slightly: Pober says current computer chips should be presumed non-conscious absent evidence, while Schwitzgebel says rejecting biology as a requirement makes it harder to dismiss silicon systems outright.
The broader implication is a widened philosophical test for consciousness—centered less on Earth-specific material and more on whether a substrate can support sufficient behavioral sophistication.
Will AI ever cross the line from mimicking consciousness to truly possessing it, and how would we know?
If alien minds can form in clouds or crystals, how would we ever recognize them as conscious beings?
Is consciousness a rare biological accident, or a common property of complex systems throughout the universe?
A Quintillion Conscious Worlds? The Case for Substrate Flexibility and Widespread Awareness in the Cosmos
Overview
A groundbreaking philosophical paper by Eric Schwitzgebel and Jeremy Pober argues that consciousness is likely widespread across the cosmos, not limited to Earth or specific biological forms. Their central idea, 'substrate flexibility,' suggests that consciousness can arise from many different physical or chemical foundations, inspired by the diversity of nervous systems seen in Earth’s animals. Drawing on astrobiology, they propose that life—and thus consciousness—could exist in forms very different from our own. This challenges traditional, Earth-centered views and encourages a broader, more open-minded search for conscious life beyond our planet.