Barrow vs Kardashev: Why Advanced Civilizations Might Turn Inward

Everything we think about alien civilizations might be fundamentally flawed, reflecting humanity's primitive understanding of progress. We often envision advanced civilizations as expanding outwards, building Dyson spheres, engaging in interstellar travel, and forming galactic empires. This perspective, however, might be akin to how cavemen would imagine progress: simply bigger and more. What if true progress isn't about outward expansion but inward mastery, controlling the tiniest layers of reality?

The Human Tendency Towards Expansion

Humans are inherently expansionist and resource-hungry. In a relatively short period, we have spread across the entire planet, consumed vast numbers of large animals, deforested a significant portion of the Earth, carved out canyons for metals, and burned immense quantities of fossil fuels. This appetite is not slowing down; it's accelerating. As we progress, we consume the planet at an increasing rate. The logical next step, from this perspective, seems to be to venture into space, claim new worlds, and exploit their resources as well.

This "bigger is better" mentality is deeply ingrained in us. For our ancestors, conquering more land meant more food and security. Throughout most of human history, expansion was key to prosperity and a better quality of life. This logic has also been applied to alien civilizations, leading to the Kardashev scale.

The Kardashev Scale: Measuring Outward Expansion

The Kardashev scale categorizes civilizations based on their energy consumption at a macro level:

• Type I Civilization: Harnesses all the energy available on its home planet.
• Type II Civilization: Controls the energy output of its entire star system.
• Type III Civilization: Has taken over its galaxy, becoming a vast empire of engineered stars, terraformed planets, and colossal starships.

While helpful, this scale is limited. It assumes that outward growth remains the primary driver of progress, an assumption that might be less relevant in the future.

The Barrow Scale: Measuring Inward Mastery

As human civilization has advanced, progress has increasingly shifted from the "big" to the "small." For example, our ancestors built the pyramids, an immense technical achievement. Yet, at a scale 100 times smaller, they created writing, which had an incomparably greater impact by making knowledge eternal and allowing information to travel through time and space.

Over millennia, our mastery over the small has grown, leading to parallel increases in our capabilities and standard of living. We learned to:

• Mix metals for better tools.
• Engineer medicines that saved millions.
• Convert air into fertilizer, feeding billions.
• Manipulate matter at the quantum level to create transistors, compressing room-sized computers into tiny, vastly more powerful devices.

Controlling the small world makes us richer, healthier, and improves our quality of life. This leads to an alternative way of categorizing alien civilizations: the Barrow scale, which measures progress by a civilization's level of control over the small.

Type 1-minus: Manipulating Our Scale

This type covers most of human history until the late 19th century. We could manipulate objects and build structures roughly at our own scale, mining, combining, and refining minerals. This level of control made us masters of the planet, but it was just the beginning.

Type 2-minus: The Immortal Gods of Nature

Humanity might be at the cusp of becoming a Type 2-minus civilization, achieving complete control over DNA, the language of life. In just 60 years since cracking the genetic code and a decade since discovering CRISPR, we are gaining powerful genetic engineering tools.

The rewards of fully understanding and controlling DNA are immense:

• Immortality: Like the jellyfish Turritopsis dohrnii, which can revert its cells to an earlier stage, a civilization with full genetic control could achieve virtual immortality.
• Disease Eradication and Enhancement: Healing most diseases and enhancing or changing bodies at will, creating better blood, bones, or muscles.
• Superorgans: Developing organs with enhanced capabilities, such as eyes that see more colors, skin that heals without scarring, or brains that sense magnetic fields.
• Organ Banks: Growing spare organs for implantation in case of accidents.
• Biosphere Control: Making pets immortal, modifying harmful species, and molding the planet's biosphere as desired.
• New Life Forms: Creating new species for various purposes, potentially leading to a new Cambrian explosion through genetic engineering.
• Climate Change Solutions: Engineering super-fast-growing plants to absorb CO2 and trap it in stable materials.

While some of these possibilities sound like science fiction, humanity could reasonably reach this level of control within decades to centuries.

Type 3-minus to 5-minus: The Invincible Gods of Matter and Energy

Moving further down the Barrow scale, things become increasingly surreal.

Type 3-minus and 4-minus: Control Over Molecules and Atoms

These civilizations can manipulate individual molecules and atoms with the same ease we stack bricks. This fundamentally transforms their capabilities:

• Advanced Materials: Creating new materials that are more durable and versatile, such as fabrics that change texture with weather, coatings that become screens, self-repairing roads and bridges, and buildings that react to light, sound, or stress.
• Programmable Matter: As control expands, matter itself becomes programmable.
• Nanobots: Building microscopic nanobots for tasks like cleaning polluted water or performing internal surgery.
• Utility Fogs: Swarms of billions of nanobots forming everyday objects like tools or furniture, effectively turning matter into hardware guided by software.

This level of control offers incredible riches:

• Elimination of Waste: Old or broken items can be rearranged at the atomic level, making the concept of "waste" obsolete.
• End of Scarcity: Most resources on a planet can be endlessly reused, eliminating the need for outward expansion to gather resources.
• Powerful Computers: Packing information into matter as efficiently as biology does could lead to incredibly powerful computers. All present-day data centers might fit into a fist-sized device, enabling advanced AIs, simulations, and scientific discoveries.

Type 5-minus: Control Over Atomic Nuclei

This level involves manipulating atomic nuclei, which are 10,000 times smaller than atoms. Nuclei define atoms and are the fuel of the universe.

• Unlimited Energy: A civilization controlling atomic nuclei would have access to all the energy it could ever need. Fusing the hydrogen from a mid-sized lake could sustain present-day humanity for millions of years. Dyson spheres or other macro-engineering projects might become unnecessary.
• Information as the Frontier: With abundant health, matter, and energy, the ultimate frontier becomes information and computation.
• New Class of Machines: Harnessing the "heartbeats" of protons and neutrons (sextillions of times per second) could create an entirely new class of machines, billions of times faster than current transistors. These computers could design new forms of life and matter and unveil the universe's deepest secrets.

Type 6-minus to Ω-minus: The Bottom of Reality

At this point, our current understanding makes speculation difficult.

Type 6-minus: Control Over Elementary Particles

This involves manipulating elementary particles like electrons, neutrinos, and quarks, where reality itself begins to dissolve.

• Reshaping Physics: Such a civilization might uncover and use new dimensions of space, locally reshape physics, or even slow down time for an entire planet or star system.

Ω-minus: Control Over the Quantum Vacuum

The ultimate level of control involves the quantum vacuum, an omnipresent cosmic fluid whose tiny vibrations give rise to everything that exists.

• Universe Creation: Full control of the quantum vacuum could enable the creation of new universes. Our own cosmos might have originated from a tiny instability in the quantum vacuum. Mastering it could grant the power to seed entirely new universes in test tubes, making such a civilization an "Omega-minus" civilization—an actual cosmic god of the infinitely small.

Conclusion

While we cannot definitively say whether advanced civilizations retreat into smaller and smaller layers of reality, or if they pursue both inward and outward expansion, exploring the Barrow scale reveals a profound possibility. The path to becoming as immortal and powerful as the laws of physics allow might not always lead to the other side of the galaxy. It can also guide us into the small world around us. This inward journey might represent the final stage of all advanced civilizations: not becoming huge and visible, but quiet gods of the gigantic small universe in their own corner of the galaxy.