In Siberia, where I grew up, winter arrives like an argument you cannot win. The air drops to minus forty and stays there for months. At that temperature, the moisture in your breath crystallizes before it leaves your mouth. The outside world becomes a place that does not want you in it. The world inside, heated by my grandmother’s stove, with walls thick enough to keep the cold back, becomes the only world that matters.

I learned something in those winters that I have spent trying to express, ever since. Shelter is not a convenience. It is the condition that makes everything else possible – thought, language, love, memory. Without it, there is only survival, and not for long. The philosopher Gaston Bachelard wrote that the house shelters daydreaming, that the spaces we inhabit shape the thoughts we are capable of thinking. In Siberia, this was not philosophy. It was physics.

Years later, I found myself studying space architecture, the design of habitats for humans living beyond Earth, and I realized that the question I had been carrying since my childhood was the same question our entire species was beginning to face. How do we build shelter when there is no ground to build on, no atmosphere to breathe, no manufactured warmth? How do we create the conditions for human life in places that were never meant for it?

The First Architecture

The answer, I believe, begins with the first shelter any of us ever knew. Before there were houses, before there were caves, before there were nests of grass and branches, there was the womb.

The womb is the original architecture. It regulates temperature. It manages waste. It provides oxygen and nutrients through an interface so elegant that no engineer has improved upon it. It shields a developing life from radiation, from impact, from the chemical volatility of the outside world. It does this autonomously, without conscious direction, as part of a system that has been refining itself for hundreds of millions of years.

Philosopher Peter Sloterdijk, in his trilogy Spheres, argues that the womb is the first sphere – the primordial enclosure from which all other forms of human habitation descend. Every house, every city, every civilization is an attempt to recreate the conditions of that original protected space: warmth, containment, the steady rhythm of sustenance. We are, Sloterdijk suggests, sphere-making creatures. We cannot exist without enclosure. The open void terrifies us because we were never meant for it.

I have spent six years developing a framework I call Space Wombism, which takes Sloterdijk’s insight and extends it into the cosmos. The central idea is simple, though its implications are vast: spacecraft and space habitats are technological wombs. They perform the same essential functions as the biological womb – providing atmosphere, managing temperature, cycling nutrients, shielding from radiation – in environments where human life would otherwise be impossible. Just as the womb shapes the organism developing within it, these technological enclosures will shape the humans who inhabit them, over timescales we are only beginning to imagine.

Breathing Technological Air

In 1961, Yuri Gagarin became the first human to breathe air that was entirely manufactured. His 108 minutes in orbit introduced a relationship between a human being and an atmosphere that had never existed before – one mediated entirely by engineering rather than by the slow planetary processes that had sustained every breath drawn by every organism for the previous four billion years.

We think of Gagarin’s flight as a milestone in transportation – the first person to leave the planet. But the deeper significance was biological. For the first time, a human being was kept alive by a closed system that replicated, in miniature, the atmospheric functions of Earth. The spacecraft became a surrogate biosphere, it became a womb.

What began as a 108-minute experiment is becoming permanent. Commercial space stations are launching in 2026. Lunar surface habitats are under development. For the first time in our species’ history, humans will live significant portions of their lives,  eventually, perhaps, their entire lives, inside machines that breathe for them.

On Earth, our relationship with the atmosphere is passive. We are born into the air. We take it for granted the way a fish takes water for granted. But in a space habitat, every molecule of oxygen is the result of a decision, an engineered process, a system that must be maintained, monitored, repaired. The inhabitants of these environments will develop a relationship with their air that has no precedent in human history. They will understand, in a way that no terrestrial human truly can, that atmosphere is not given. It is made.

The Thin Wall

In Siberia, the wall between life and death was thick – logs, insulation, the accumulated wisdom of generations who had learned what winter required. In space, the wall between life and death is measured in millimeters. A few layers of aluminum and composite material, and beyond them, the vacuum.

This changes something fundamental about how humans relate to their shelter. Astronauts on the International Space Station report a heightened awareness of the sounds their habitat makes – the hum of fans, the cycling of pumps, the occasional creak of thermal expansion as the station moves between sunlight and shadow every forty-five minutes. They listen to their walls the way a sailor listens to the hull of a ship in heavy weather. The habitat becomes almost animate, a living presence whose continued functioning is indistinguishable from its own existence.

This intimacy between inhabitant and enclosure is precisely what Sloterdijk describes when he writes about spheres. The womb is not experienced by the fetus as an external structure. It is the totality of the world. There is no distinction between self and environment because the environment is the self’s condition of possibility. The space habitat recreates this relationship at the scale of adult consciousness. You do not merely live inside the habitat. You live because of it, with every breath.

I think about this when I hear people describe spacecraft as vehicles or containers, as though they were trucks or shipping crates with better engineering. These mechanical metaphors obscure something essential. A vehicle takes you from one place to another. A container holds things. But a womb sustains life. It nurtures. It shapes. The difference is not semantic. It determines what we prioritize when we design our environments, what we measure, what we consider success.

What Shelter Makes Possible

On Earth, architecture has always been understood as a cultural act. We build not just to survive but to express who we are, what we value, how we wish to be remembered. Cathedrals, temples, monuments. These are shelters for meaning as much as for bodies. But in space, architecture returns to something more primal. It returns to the question that preceded culture: how do we exist, how do we stay alive?

When every aspect of your environment is designed, when the light you see, the air you breathe, the sounds you hear, the gravity you feel are all products of engineering decisions, design becomes the medium through which reality itself is constructed. The habitat designer is no longer decorating a pre-existing world. They are creating the world. The color of the light in a corridor is not an aesthetic choice. It is a choice about what kind of consciousness that corridor will create.

Buckminster Fuller was one of the first to bring this idea into the light. In a paper I co-authored with Marc Cohen, Buckminster Fuller's Dymaxion House as a Paradigm for a Space Habitat (AIAA ASCEND, 2020), we argued that Fuller's 1929 Dymaxion House was the closest twentieth-century domestic architecture came to a space habitat. He painted a picture of a house that could be a closed life-support system, integrating climate, waste, water, structure, and atmosphere as a single organism. He treated the dwelling as a technology of survival, not a backdrop for it. He was thinking, even then, in wombs.

This is where the womb metaphor becomes most urgent. A womb does not merely keep an organism alive. It shapes its development. The chemical environment of the womb influences gene expression, neural wiring, the formation of the systems that will later determine how the organism perceives and interacts with the world. 

Space habitats will be formative in the same way. The humans who grow up in orbital environments, who learn to walk in partial gravity, who have never felt rain, who know the color of the sky only from images – will be shaped by their enclosure in ways we can barely predict. Their sense of what is natural, what is beautiful, what is safe, what is home, all of it will be different. The habitat will have made them, just as the womb makes us.

The Next Billion Years

I titled my forthcoming book Space Wombism: The Next Billion Years of Human Shelter because I believe the design decisions we make in this century will create path dependencies that constrain and enable human possibilities for an almost incomprehensible span of time. The habitats we build for the first orbital settlements will influence the habitats built for lunar colonies, which will influence the habitats built for Mars, which will influence the generation ships that carry human consciousness to other star systems.

Single-planet species do not persist. This is not pessimism. It is probability. Asteroids, supervolcanoes, pandemics, climate collapse, the list of existential threats grows longer than our strategies to address them. A colleague at NASA’s Jet Propulsion Laboratory has argued that humanity may only have a narrow window to become a spacefaring civilization, after which the opportunity becomes too difficult to pursue. The only durable solution is redundancy. Human consciousness must exist in multiple places, in habitats that can sustain it independently of Earth.

But survival alone is not sufficient motivation for the kind of effort this requires. We need to understand that what we are building is something new in the history of life. For four billion years, every living thing on this planet has existed within a biosphere it did not create and could not control. Space habitats represent the first time life has constructed its own biosphere from scratch. This is an evolutionary threshold as significant as the emergence of multicellular organisms or the development of language. We are becoming a species that builds its own planetary conditions. We are becoming, in a sense, our own Earth.

Dreaming in the Womb

Bachelard wrote that to inhabit a space is to dream within it. The quality of the space determines the quality of the dream. A cramped room produces cramped thoughts. A vast landscape produces expansive ones. If this is true, and I believe the phenomenological evidence supports it, then the design of space habitats is a question about what kinds of dreams we want humanity to have.

I often think about this when I review habitat designs that treat crew spaces as afterthoughts – small, utilitarian, optimized for mass and volume at the expense of everything that makes a life worth living. These are habitats designed by people who think of spacecraft as machines. They are not thinking about what it means to raise a child in a corridor, to fall in love in a module the size of a studio apartment, to grieve in a place where you can never open a window.

The womb metaphor insists that we think differently. A womb is not optimized for efficiency. It is optimized for development – for producing a healthy, complete organism capable of thriving in the world it will enter. If we design our space habitats as wombs rather than as machines, we optimize for different outcomes. We ask not just whether the crew can survive, but whether they can flourish. Whether they can think new thoughts. Whether they can become something more than they were when they arrived.

The astronaut Frank White coined the term “the Overview Effect” to describe the cognitive shift that occurs when humans see Earth from space – the sudden recognition of the planet as a single, fragile, borderless system. White and I have discussed the relationship between his work and mine. His insight is that seeing Earth from outside transforms consciousness. Mine is that the transformation is only possible because the astronaut is enclosed in a protective environment that permits the seeing. No womb, no Overview Effect. The two are inseparable.

The Apollo astronaut Rusty Schweickart described the experience of leaving Earth as a kind of birth. Before his mission, he said, he had related to Earth the way a fetus relates to its mother –enclosed, sustained, unable to see her. Only from orbit, on the other side of the atmosphere, could he see Earth as a whole and feel any real responsibility for her. He called it the Cosmic Birth Phenomenon. 

Coming Home

I still think about my grandmother’s stove. The way the heat moved through the room. The way the walls held the cold at bay. The way that small, warm space made it possible to sleep, to dream, to imagine a future that extended beyond the frozen landscape outside the window.

That stove was a technology. Crude by modern standards, but a technology nonetheless – a system for converting fuel into the conditions necessary for human life. The space habitats we are building now are the same thing at a different scale, with higher stakes. They are stoves against the cold of the void, walls against the vacuum, warm rooms in which human consciousness can persist and grow.

The light of consciousness took billions of years to emerge on this planet. It may be the rarest thing in the universe. Sheltering it, carrying it forward across deep time and deep space, is perhaps the only architectural project that matters at civilizational scale.

We have always been womb-builders. Every hearth, every house, every city is a sphere constructed against the exterior. What changes now is the exterior. It is no longer winter. It is the cosmos itself. And the question is the same one my grandmother answered every night when she fed the stove: how do we keep the warmth alive until morning?

The morning, in this case, is a billion years long. We had better build accordingly.