The Threshold

Earth. A blue curve against black, weather turning slowly across it, the terminator line dividing day from night. The camera begins to move.

Our world.

It drifts inward. A satellite passes, then another, dead metal turning in the cold. The planet grows. It fills the frame.

If we are honest, we’ve made a mess.

The atmosphere meets the lens as a thin bright skin, and then the camera is through it and falling. Cloud. A passenger jet, silver, level, going somewhere ordinary. The descent quickens.

Rampant climate change. Wars of territorial, political and religious aggression.

Fighter jets, two of them, banking hard, and the camera drops past them faster than they can fly. The land rushes up.

The world’s wealth captured by the few. People treated as objects of data to be profited from.

The surface arrives without mercy.

A city block on fire, the smoke flat and black. A river where a river should not be, rooftops standing in it. A field cracked open by drought, the soil curled like paper. A child carried at a run. A line of people at a wire fence. A crowd and a wall of shields, and the gap between them closing. A missile leaving its rail. A coastline that is not where the maps put it.

We had answers but no solutions.

The images stop. Black.

And then they came.

---

Sofiya’s introduction

I am Sofiya Moroz. When the UPF invited me to make a documentary about how they invaded Earth I insisted on three things. First, that I would have access to interview whoever I wanted. Second, I insisted we film in my beloved Kyiv. Why not use the funding to invest in a city recovering from war? Finally, that I would have full editorial control over the content.

To my surprise they agreed to everything. Across this series we will hear from soldiers, pilots, and civilians of the UPF and they will answer for their actions. This is the story of how to invade a planet. Our planet.

---

Sofiya rose to meet him.

He was two meters tall and too light for it: built for lower gravity than this, the frame stretched out and slender in a way no Earth body was slender, the arms and fingers too long and fine. His skin was pale with a faint blue tint. His eyes were amber and large. His ears came to a point.

He wore a long sleeveless robe in cobalt, the upper half bound in complex folds by a green cord that looked like it was trying to strangle him. The lower half fell free to the floor.

Strange tattoos climbed his right arm from fingers to shoulder. His left had eight tattooed rings with complex patterns inside, forearm to elbow.

When he smiled, the mouth was thin. It was still a warm smile.

This is Augur Taveth ka Del’an. He watched Earth for thirteen years as we fought and killed, struggled with climate disasters and pandemics. He is the one who recommended the UPF invade Earth.

He reached out to shake hands. His slender fingered grip was smooth and strong as it enveloped her hand. “It is good to meet you Sofiya Moroz. I am Taveth ka Del’an.”

“Nice to meet you too, please make yourself comfortable.”

Taveth sat drawing his legs up underneath him in a way Sofiya thought must be uncomfortable but he seemed happy. “How do you wish to start?” His voice was mild, melodious, and deep.

Sofiya smiled at him. “Why don’t you tell me about your home? And if it’s not too personal, your tattoos.”

“These?” He glanced at his arms. “Deil is a beautiful world, lower in gravity compared to yours. Did you know I have had to spend six months in conditioning to be able to walk in your beautiful city unaided?”

Sofiya’s gaze sharpened at the mention of Kyiv, but she let it slide.

“We have many forests, with trees much larger than yours. That’s where our culture grew up after we colonised the planet thirty thousand years ago.”

The UPF is old. Human variants have been colonising the galaxy for at least 150,000 years. While our ancestors broke rocks to make axes these people were travelling between the stars. It’s confronting. Earth is the cradle of all humanity, including Taveth. But his kind have been among the stars for millennia.

He smiled wistfully. “In the forest cities of Deil watching the sunset over the horizon is rare. I’ve seen it a few times as a young man.” His amber gaze flicked to his arms. He held them in front of him, turning them over. “My tattoos. These…” he held his left arm up. From wrist to shoulder “…are my family and…” he searched for the word, “…clan is the best word in English.”

“You have learnt English? You don’t use the universal translator.”

“Yes, and Ukrainian. It would be Клан in your language would it not? I am less fluent in your tongue, sorry.”

Sofiya’s expression softened for a moment, then hardened. “Your tattoos?”

“Yes. These show, from wrist to shoulder, the major events for my clan and family. Up to here.” Taveth reached up with his right hand and tapped a complicated vaguely floral shape. “This is the symbol of my birth. I am named after the Taveth. The analogue on Earth would be a flower that blooms only in the depth of night, for I was born in the heart of darkness.”

“The heart of darkness?”

His gaze floated to the roof as he searched for his words. “An idiom. Deil has a season where it is eclipsed from our orange sun by the giant planet Liordac. Sixteen standard weeks. This is dark season. Also known as the Heart of Darkness.”

He raised his other arm. “These are the record of my life so far.”

Sofiya nodded. She looked down at her notes for a moment. Looking up, her expression was a mask of hard professionalism.

“Let’s start with the UPF Spy Station. Tell me about it. How long has it been watching?”

Taveth cocked his head looking at Sofiya for a few seconds, then nodded. “Perhaps we could start a little earlier. The UPF scout survey ship Failure Mode Detection entered the Sol System exactly four hundred and twenty one standard years ago. Four hundred and one years in Earth years. They quickly determined that Earth was inhabited. After surveying the rest of the system they entered orbit and ended up spending an unprecedented two years in orbit.”

“Why?”

“The reports suggest they wanted to be sure. But they could not hold the magnitude of what they found. The crew were a human from G’vok and a Chelva from Orinigathimatura.”

“Chelva, they are the uplifted earth Octopus, like the Proconsul.”

“Chelva, yes. They prefer that name; ‘octopi’ belongs to Earth now. The knowledge of their uplift is still something they are adjusting to. They make excellent scouts, their native curiosity and cleverness are well suited to it. And they seem to gravitate towards it as far as UPF careers go, though they are involved throughout the Federation of course.”

“You mentioned the magnitude of the discovery.”

“Indeed. Imagine, your species…or in this case both your species have concluded you are not native to your home world. You understand that some event in the past meant you were transplanted. The evidence of archaeology, history, biology, ecosystem evolution all confirms you’re not from here. It became clear that humans were seeded onto four worlds and the Chelva uplifted to four others. In each case one of the civilizations achieved gravatic manipulation and the jump drive and found the others. Each time they thought this might be the origin world, but it was not.”

Taveth looked at Sofiya for a long moment. “Then we searched for an eon, over one hundred thousand years. Exploring. Colonising. Growing. Meeting other sophont races. Wars, peace. The question of human and chelva origins faded into the background, but never truly went away. It is a part of the story of my world. I was raised with it. A grounding story of my origins is that we don’t know what our origins are.”

“The Failure Mode Detection reports are dry, scientific. But can you imagine how it felt to those first two explorers? Especially when they found living octopi in the oceans. The progenitor species of the Chelva, unmistakable. Here was the origin world of both races.”

Sofiya looked at him, an unspoken question in her eyes.

It’s hard to imagine the generational longing embedded so deeply in a civilization. On Earth, perhaps the only people who might come close to understanding are those who have been forcibly colonised, displaced, and have lost their heritage and homeland. But generational longing is not justification.

“Then what happened?”

“They travelled back, coreward, trailward, and filed their report. It excited a lot of interest. A larger scientific survey was sent, the Ground Truth, made up largely of humans and chelva, though a few Vaeli, Arxcronix, and Yulsa joined the crew. They confirmed the reports, produced a wealth of further scientific data and recommended setting up Observation Post Vigil, UPSS X3750. That was confirmed and they dragged a large rocky asteroid into the Earth Trojans and set up the base that has been my home for the last thirteen years. That was May 6th 1645AD.”

Sofiya’s expression hardened. “So you have been watching for three hundred and eighty three years.”

Taveth reacted to the hard tone in her question, cocking his head and making a throaty clucking sound in agreement. “Not me specifically, but the UPF yes.”

Silence stretched between them. Sofiya’s hand unconsciously drifted to the golden cross around her neck. She looked past Taveth to the city out the window, damaged but not broken by years of war.

“You watched for 381 years. So why invade now?” The sharp edges of the question cut the softness in the room.

Taveth blinked, then nodded. “You have read the reports yes?”

Sofiya smiled, sharklike. “As you said, the reports are dry, scientific. 99.5% chance of a catastrophic climate cascade causing a mass extinction event. But how did it feel?”

Taveth shifted in his seat, his legs unfolding from beneath him, bare feet poking out from under the robe as he planted them on the floor. He sat forward. “As I said, I had watched for thirteen years. I had read the reports filed over the last three centuries. Much of what we saw happening on earth is not unusual for a developing race. Increasing industrialization, advancing science, evolving philosophies, some useful, some not.”

“Can we digress for a moment? I saw in the reports a growing sense of alarm about the developing and embedding of capitalism. Why the concern about that?”

Taveth relaxed back into his seat. “Capitalism, or the local variants of it, has been a key contributor to the decline of almost a dozen developing civilizations the UPF know about. It has never been a dominant ideology for a civilization that has obtained jump drive. When I got here, the kind of…” Taveth looked at Sofiya for a long moment. “…extractive capitalism that had come to dominate all economic thinking regardless of national and religious views was, well, distressing.”

Sofiya made no note. She looked at him steadily.

“So you’re saying capitalism is the cause.”

Taveth blinked. “No. As I said it is a contributing factor. We have extremely sophisticated sentient modelling software that accounts for literally thousands of variables. Extractive capitalism influenced the model, but it would be an overstatement to say it was solely causal.”

Footage: news articles showing protests against companies polluting local areas. Footage of exploited workers in the global south moderating content for social media platforms. Protests outside G7 meetings.

Taveth continued. “For 70 years after the Second World War the nations of Earth had made some effort to agree to an International Rules Based Society, even while many nations broke these principles. Since the turn of the millennium that has been eroded. By 2026 it was largely defunct. This has been a result and cause of political fracturing across many nations.”

Footage: the January 6th insurrection in the USA. Clashes between political left and right in the UK over immigration and support for Gaza. Protests brutally repressed in Hong Kong and Iran.

Sofiya looked back down at her notes, posture rigid. When she lifted her head her gaze was like a hammer. “So. Tell me Augur Taveth ka Del’an. What made you decide to invade Earth?”

Taveth smiled briefly, warmly. “Imagine a future with endless possibilities. As choices are made some possibilities close off, others open up. The choices being made by Earth humanity had collapsed almost to one possibility.”

“Explain please.”

Taveth settled in his seat. “In the end the modelling showed a convergence of several things that in themselves would be bad but not catastrophic. First, and most fundamental was the looming climate catastrophe. Modelling suggested that by the end of the century that there would be a collapse of life on Earth, not a complete collapse. Likely it would have meant a regression of human technological advancement, many species would become extinct. Billions of humans would die, but humanity would live on. This is not reason to intervene.”

Sofiya tensed as he talked, then visibly forced herself to not react.

“Second, the probability of a limited nuclear exchange as a part of the war of territorial expansion waged by Russia against Ukraine was over ninety percent. This meant the possibility of limited retaliatory strikes by European powers was also very high. But this itself is not a reason to intervene.”

“Not a reason…” Sofiya cut herself short. Then waved her hand. “Continue.”

“The election of the US president was deemed a significant increase in the possibility of violence, regardless of what was said on the campaign trail. This also increased the chances of a limited nuclear exchange of some sort however it was not high as there were no obvious targets. So again no reason to intervene.”

Sofiya took a deep breath. “So you are saying that events that could lead to mass loss of life; climate disaster, nuclear war, are not reasons to intervene? Even when billions of lives are at stake.”

“Yes.”

“Why aren’t they?”

Taveth interlaced his fingers in his lap, seemingly gathering his thoughts. “The UPF is ten thousand years old. Before that there were wars within races, and between races. It was not until the Vaeli invented the universal translator that true peace became achievable. And even now it is still tenuous. Do you know what our Sophontologists deem the major cause of wars within and between races?”

Sofiya nodded. “I’ve done my research. Taking away choice.”

Taveth nodded. “Not exactly, but an accurate summary. Removing, or perceiving the removal of, self determination. A core principle of the UPF is to allow self determination at both a civilization and an individual level. The justification to break this principle and actively intervene in another civilization must be unassailable.”

“Unassailable.” Sofiya’s voice was flat and hard. “You haven’t made the case.”

“You are correct. The bombing of Iran in February 2026 was the final event. This created a target for nuclear aggression for the United States of America. We modelled the probability being at 99.8%. This lifted the possibility of a limited nuclear exchange in Europe as Russia, emboldened by the USA getting away with it would strike key cities in Ukraine including this one. To which Europe would retaliate. However…”

“That would not justify intervention.” Sofiya held the cross at her neck and looked out at Kyiv. She looked back at Taveth. “So Augur, what would?”

“The rapid collapse of the entire biosphere of Earth leading to the extinction of all life on Earth. Except perhaps some deep sea tube worms and the like. Your scientists have been telling you for decades about the coming climate catastrophe. Your climate science was all ingested into our modelling. Despite the unwillingness to act on the data you were tracking the decline with considerable accuracy. We took that seriously.”

“But you said earlier that wasn’t justification.”

“Not on its own. On its own there might be enough time for Earth humanity to avert the worst of it. The limited nuclear exchange raised the possibility of causing a runaway greenhouse effect that would cause the collapse of the entire biosphere in no more than 10 years. It is not possible for any species, no matter how clever, to adapt in time. We could have tolerated the self-extinction of humanity, as tragic as that would have been. The destruction of the biosphere was not something we could permit. That combined with the sociological, historical, and cultural value of the home world of two major races in the UPF made allowing the human caused cascading climate collapse destroying all life on Earth unacceptable. The probability of such an event was deemed to be 99.5%. So I made the case for intervention.”

Sofiya set her pen down on the notepad. Outside, the city moved on without comment.

Silence.

Footage: the first shots from the James Webb telescope of the UPF fleet passing Mars. Floods, storms, droughts, tornadoes. A student march for the climate in New Zealand with 40,000 high school students gathered at Parliament. Images of headlines from scientific articles warning of climate change, covers from the UN climate commission reports.

Sofiya watched Taveth, then took a deep breath. “So a 99.5% chance of biosphere collapse. That’s what tipped you over the edge. Why not intervene at 80%? Or 60%. How many people have died waiting for the probabilities to get high enough?”

Taveth regarded Sofiya with a soft stare. She met his gaze unflinchingly. “There must be overwhelming evidence for the outcome before overriding Sophont agency. At lower probabilities other less catastrophic outcomes are possible. Intervention without justification would violate doctrine.”

Sofiya’s eyes moved to the window for a moment, then back to Taveth.

“That’s circular Taveth. You’re saying the doctrine sets the threshold and that the threshold justifies the doctrine.”

Taveth raised an eyebrow. “Not at all Sofiya. The principle, as I stated earlier, is a core principle of the UPF. This is merely the application of the principle.”

Sofiya leaned forward. “You didn’t answer the other question. How many people died waiting?”

“It wouldn’t have changed the decision.”

Sofiya held his gaze for a long moment. Then she crossed her legs, frowning at him.

“You say it wouldn’t have changed the decision, but maybe you decided too late? Surely there were other options. You had agents embedded on Earth for eighty years. I am interviewing one later. You could have done something other than invade, other than requiring humanity to cede sovereignty.”

Taveth cocked his head and looked at her for a long moment. “You know your world before invasion. Imagine if we had revealed ourselves and given even one item of our technology to the then existing governments or companies. What do you imagine they would have done?”

Sofiya crossed her legs uncomfortably. “Used it to gain power over others.”

“It is so. Which violates a key principle of the UPF. If we had given our rail gun technology to everyone, what would have happened?”

“You tell me.”

“It would have simply been deployed for military advantage by whomever could manufacture it fastest. Do you disagree?”

Sofiya leaned forward, pressing the question. “No. But what about your health technology? The nano hives the drop troopers have? It could have saved many lives.”

“Do you think it would go to the people who need it the most, or be held and exploited by the rich, and used to make soldiers tougher?”

“You’re doing it now.” She sat forward. “The technology transfer. New Zealand. Nano hives, clean energy. You’re giving people exactly what you’re telling me you couldn’t give them.”

Taveth was quiet for a moment. “Yes.”

“So explain the difference.”

“The conditions changed.” He unfolded his hands. “In 2026 there was no framework to prevent a government seizing a technology and weaponising it. No enforcement mechanism. No authority able to distribute it equitably. The invasion created that authority. The transfer is possible now because we removed the conditions that would have corrupted it.” He paused. “You’re right that we’re doing it now. I’m telling you why we couldn’t do it then.”

“You ask if we could have acted sooner. But any action short of what we did would have meant taking sides in some fashion or another. The unexpected variables that emerged between 2022 and 2026 changed the situation materially. Could we have acted sooner? Maybe, though the usefulness of that action was contested.”

Sofiya said nothing.

“The probability modelling suggested…”

“Maybe,” she said.

Taveth stopped.

She held his gaze. “You said maybe. Thirteen years of watching. Three hundred and eighty-one years of data. A decision that ended the sovereignty of eight billion people. And the best you can offer is maybe.”

“Yes.” His voice remained mild. “It is an honest answer. I could give you a more certain one. It would be less true.”

“Who decided that?” Her tone was hard.

“The UPF Military and Civilian Council. On my advice.”

Sofiya stared at Taveth for a long moment. “And what gives the UPF the right to make that decision on behalf of humanity?”

Taveth smiled kindly, clearly expecting the question. “On behalf of Earth humanity to you mean. There are trillions of humans out there.”

Sofiya waved his deflection off in frustration. “Fine, point taken, but what gives the UPF, an organisation made up of humans and aliens the right to make that decision on behalf of the people of Earth?”

Taveth shifted in his seat, drawing his feet back under himself. “Let me respond with a question. If you were a police officer with a gun and you saw a person with a bomb strapped to them about to blow up a crowd what would you do?”

Sofiya just stared at Taveth in silence.

“Exactly. It is the same choice at a larger scale. The extinction of a biosphere at the hands of the people of Earth is the same as the person with the bomb.”

Sofiya looked past Taveth out to the city under repair. “It’s a convenient analogy. What if people disagree with the police officer killing the bomber. What if there is a third way?”

Sympathy flickered across Taveth’s face. “At what cost Sofiya?”

Sofiya sat back. Her hand drifted toward the cross at her throat, then stopped. “At what cost?”

Footage: drop pods falling through the atmosphere, one explodes. A US soldier shot through the knee collapsing to the ground, raising his gun then being shot through the arm. A frigate sinking, sailors abandoning ship. Damage from a Russian drone strike in Kyiv with bodies under white sheets in the foreground.

She leaned forward. “At what cost? No matter how hard you tried, people died. You lost troopers. Earth soldiers died before they could get medical attention. Sailors drowned. People in cities that should have been…” She stopped. “People died in wars where you did not intervene soon enough.”

Taveth clucked gently, a softly sympathetic sound, he cocked his head looking at Sofiya with large amber eyes. “Humans were killing each other at a considerable pace before we intervened. Your own Institute for Strategic Studies estimated that approximately 657 people were killed per day in wars, terrorism, and conflict. This is in addition to the approximate 440,000 killed annually in global homicide. Humans were killing humans at a rate of approximately 679,805 each year.”

Sofiya sat statue still. The only movement the twisting of her fingers around the chain of the cross at her neck.

“By comparison, the UPF invasion lost 2567 troopers. There were 943 human military deaths from secondary causes such as infection, or self harm as a result of the conflict. Though these were all preventable if the nations concerned had ceded sovereignty and allowed us to provide medical care to their wounded. These casualties are regrettable but within acceptable tolerances. The costs borne by the UPF were greater; in some cases UPF soldiers chose to sacrifice themselves to prevent greater harms.”

“Since most countries have ceded sovereignty, the number of humans dying in war and conflict has dropped to zero. There are still some incidents of terrorism sponsored by nations who have refused to cede sovereignty, but in those cases we have been able to save 98% of the people harmed. The same is true of the number of homicides, it has dropped drastically globally and in almost all cases we have been able to save the victims.”

“And we prevented a cascading climate catastrophe that would have killed eight billion humans, including you, and wiped out all life on Earth.”

“So tell me Sofiya, would you rather we left things as they were?”

Hard numbers. Hard facts. An unassailable argument.

The moment stretched between them, neither moving.

Taveth broke the silence. Standing he stretched then glided to the window, stood looking out at the city under repair. After a long moment, he turned back, in silhouette against the grey sky and city. “I know why you chose Kyiv, Sofiya. Not the funding.”

Quietly he moved back to his seat and sipped from the glass of water. “The calculation was right.” A pause. “That is not the same as it being easy to have made.”

Sofiya caught herself holding her cross, she picked up her pen and scribbled a note on her notepad. When she looked up she was composed, professional.

The room was quiet. She looked at her notepad.

“So, Augur Taveth ka Del’an, now that the invasion has largely wound down and there is no need for a spy station what do you do now?”

Taveth blinked twice, then grinned broadly. “I have taken a leave of absence. A few days ago I stood on Diamond Head and watched the sun rise over the mountains in the east, traverse the sky and set past the pacific ocean. The golden light of the sun on the water, the pink sky shading to deepest blue. I have longed to see this for the whole time I watched. To feel the heat of the sun on my face. The cool of the salty sea breeze. This is a truly beautiful planet Sofiya.”

Footage: the sunset from Diamond Head.

For thirteen years he had the data. The Pacific in spectroscopic analysis. Diamond Head in orbital imaging. He described the heat of the sun on his face as though I had never felt it myself. I understood him perfectly.