“My personal space,” Quantook-LOU said.

Joshua could just make out the misty smears of the nebula through the curving walls. Sharp-edged dissipater cones formed a strange, close horizon. Sunside was a simple uniform mantle of red light. “It is matched with everything else we have seen here,” he said.

“What of your world, Captain Joshua Calvert? Does it have sights to match this?”

The exchange of history began. Under the Mosdva’s urging, Joshua, Samuel, and Oski started off describing continents and oceans (concepts which had to be clearly defined for the Mosdva—they’d even lost the words for them in their language), and moved on to explain how humans had emerged from Africa to spread across Earth after the Ice Age glaciers retreated. How a technoindustrial society had developed. The rampant pollution which had altered the planetary ecology for the worse, creating an era where ships flew between the stars to found new colonies. How the Confederation now embraced hundreds of star systems, and traders prospered among them. A colourful generalised summary, devoid of any real detail and timescale.

In return, the Mosdva told them of Mastrit-PJ’s long story; how neither they nor the Tyrathca were the original sentient species on the one planet which supported biological life. The Ridbat were the first, with a society that had flourished over a million years ago. Little was known of them now, Quantook-LOU said, other than whispers that trickled from generation to generation becoming wilder with each telling. They were Mastrit-PJ’s true monsters, ravenous beasts with evil minds. Wars had been constant while they were alive, two of which escalated into the exchange of nuclear weapons on the planetary surface. Their civilization was knocked back from an advanced technological culture to primitive barbarian on at least three separate occasions. It wasn’t known if they ever had spaceflight; there was no evidence of off-planet activity. The fourth and last Ridbat industrial era was brought to an end by thermonuclear conflict, concurrent with the release of biological weapons which wiped them out along with seventy per cent of the planet’s animal life.

The Mosdva had risen to a rudimentary state of intelligence while the Ridbat ruled the planet. That made them useful slave creatures, who were bred for dexterity and strength and passivity while any traits such as curiosity or stubbornness were ruthlessly culled. By the time the Ridbat exterminated themselves, the Mosdva had become fully sentient. Although their population was severely reduced by the diseases raging across the land, they did at least survive as a species.

With the Ridbat gone, Mosdva evolution reverted to more traditional lines—as normal as life could become on such a ruined planet. Their own civilization was extremely slow to emerge as a coherent whole. Mastrit-PJ, with its exhausted mineral resources, devastated biosphere, and extensive radioactive deadlands, was not an environment conducive to sophisticated or high-technology-based cultures, and the cautious Mosdva psychology fitted this well. They became nomadic during the period of nuclear winter which followed the demise of the Ridbat, roaming between habitable areas. It was only after the glaciers withdrew, half a million years later, that the Mosdva began to advance again.

They achieved a modest level of industrialisation. Because there were no underground petrochemical deposits left, nor coal or natural gas, their technology was based around the concept of sustainability, benign and in harmony with the ecosystem. Although not opposed to change, change generated from within was extremely slow to manifest itself. Steady advances in the theoretical fields of science such as physics, astronomy and mathematics were not grasped upon for technological extrapolation. They already lived in what they considered to be a golden age. After their terrible heritage, stability was the one icon they craved above all else. Such a desire could have led to a society whose timescale rivalled geological epochs.

Fate dealt that prospect two bitter blows. Once the glaciers were gone, the Tyrathca, until then simple bovine herd animals, began to share in Mastrit-PJ’s evolutionary renaissance. Their sentience was a long time emerging, but their progress towards it reflected their physical stamina, plodding forwards imperturbably. On any other world, their total lack of imagination would have been a serious flaw, but not here. Sharing the planet with a species as benevolent and (by now) advanced as the Mosdva meant that they had access to machinery and concepts they themselves could never originate.

Unfortunately for the Mosdva, the Tyrathca were more aggressive, a trait which came from their herd ancestry and its consequent territorial disputes, which in turn led to the breeding of the vassal castes, especially the soldiers. With their copied technology, greater size and larger numbers, they swiftly became the dominant of the two species.

This situation could well have spelt extinction for the Mosdva. Their settlements were being put under considerable pressure by the Tyrathca expansion. Then Mosdva astronomers discovered their star was about to expand into a red giant.

For a race whose thoughts operated on an abstract level, the knowledge of certain extinction in 1,300 years’ time would be devastating enough; for the Tyrathca, to whom a fact was immediate, it was intolerable. Racial survival provided a unifying motivator which enabled them to swiftly consolidate their domination of the planet. For the second time in their existence, the Mosdva were effectively enslaved. First they were used to devise a scheme whereby some if not all the Tyrathca could survive the star’s expansion. They came up with the arkship concept which would guarantee ultimate racial survival, with habitable asteroids sheltering the remainder of the population which couldn’t be evacuated. Secondly, they were made to implement it.

With their smaller bodies, greater dexterity, and higher intelligence, they made excellent astronauts—unlike the Tyrathca themselves. Mosdva technical expertise was adapted and utilized to capture asteroids and shunt them into orbit around Mastrit-PJ, where they were hollowed out and converted into arkships. The arkship building phase lasted for seven centuries, in which time 1,037 were built and launched.

After this, with the star’s growing instability wrecking the planet’s fragile ecology, Mastrit-PJ’s massive space manufacturing capability was switched to adapting asteroids into habitats. The asteroids chosen were orbiting more than a quarter of a billion kilometres from the star, putting them outside the predicted expansion photosphere. As this operation was far simpler than changing asteroids into giant starships, over seven thousand were created in just two centuries. Unlike the arkships which were immediately lost to the Tyrathca upon completion, building the asteroid habitats was a near exponential growth process, as new habitats used their industrial capacity to prepare further asteroids.

A thousand years after the project began, the planet had become uninhabitable, and was completely abandoned.

No Mosdva were ever carried on an arkship, the vessels were used exclusively by the Tyrathca. As soon as they had finished building one, the Mosdva were moved on to the next.

However, they couldn’t be excluded from the asteroid habitats without a policy of complete genocide. The Tyrathca tolerated them, knowing that their own numbers were constantly rising, necessitating an ongoing construction programme. And with the exact conditions of the star’s expansion unknowable, they would need Mosdva technical ability to adapt the asteroid habitats to the environment of the swollen photosphere.

When Mastrit-PJ’s star expanded, its diameter was larger than predicted, as was its radiant heat output. New, larger thermal dissipation systems had to be constructed for the asteroid habitats, and quickly. As a consequence, the habitats became even more engineering-dependent, which began the gradual shift of political power. Only Tyrathca breeders were capable of any meaningful technological activity, making all but the builder, housekeeper, and farmer vassal castes redundant. Their soldier caste was now bred purely to keep the Mosdva in line.