In the year 2450 AD, Earth's environment deteriorates rapidly. Various resources are dwindling, the global human population hits an astonishing 20 billion, and the economy reaches its peak.
By 2470 AD, all renewable resources on Earth are exhausted. The global economy collapses, national economies fracture, and the human population plummets drastically.
In 2530 AD, Earth's economy regresses by 100 years, with the human population dropping by 2 billion.
In 2535 AD, the United Nations is re - established. A joint immigration plan is formulated to integrate all resources and move humanity off Earth.
The first year of the Star Era ushers in global unification—no more national boundaries, no more technological barriers. The whole world unites as one, truly achieving "science without borders," and humanity enters the Great Trough Era.
In the 100th year of the Star Calendar, at the cost of a 100 - year Great Trough, humanity succeeds in immigration. The first space city is built on the Moon, an 80 - square - kilometer city capable of housing about 5 million people.
By this time, the human population on Earth has plummeted to 8 billion. In a hundred years, the population has decreased by 10 billion. Bodies litter the land, and people live in misery. Yet, because of this, humanity gains a new lease on life.
In the 230th year of the Interstellar Era, human aerospace technology develops by leaps and bounds. In just over a hundred years, hundreds of space cities, big and small, are built on Mars, the Moon, and Jupiter. Over 95% of humanity chooses to immigrate to space.
Less than 5% of humans remain on Earth. They strive to improve Earth's ecosystem and also obtain resources from other planets to rejuvenate Earth. In the 270th year of the Star Calendar, after 40 years of transformation, Earth's ecosystem and natural resources reach the peak of civilization history.In the 340th year of the Star Calendar, scientists make a breakthrough in genetics. It can greatly improve human physical quality, extend lifespan, and reduce the occurrence of various diseases. However, it can't modify adults, not even teenagers. The older the age, the harder it is. So the best result is to start cultivating from infants.
Thus, genetic scientists propose a plan. They intend to inject genetic drugs into all newborns. But due to the high cost, initially, it can only be used on children from wealthy families.
In the 365th year of the Star Calendar, the genetic modification plan is halted. Because it violates humanitarianism. From the moment of birth, infants are human beings and have human rights. They have the right to choose from birth; even parents can't make choices for them.
Genetic scientists become outcasts. They don't blame anyone. They all understand—it's just an oversight. "Not worrying about scarcity, but worrying about inequality." Genetic drugs are extremely expensive, destined to be only for the rich. In the era of interstellar immigration, this gap widens further.
In the spring of the 450th year of the Star Calendar, it snows on Earth. All space cities also have snow. It's strange—the weather in space cities is clearly controlled by computers. How can it snow in spring?
The next day, even stranger things happen. This snow doesn't melt naturally. It piles up there, each flake distinct in shape, icy to the touch. It only melts when in direct contact with living organisms. When people or other life - forms touch it directly, it melts, and there's no snowmelt left—it's as if it merges into the body.
Scientists conduct various experimental analyses but draw no conclusions. No harmful substances to the human body are found in the snow either.
This snow lasts for over a month and then ends. Every place is covered in white, beautiful as a silver - wrapped world.
In the summer of the 450th year of the Star Calendar, for some reason, people become very irritable. Violent attacks in public places occur frequently, a rare occurrence in the New Era. Even quarrels have become extremely rare.
But this summer, fights happen frequently—though they're just fights, so no one takes it to heart.In the winter of the 450th year of the Star Calendar, the whole year is bizarre. It snows in spring, people turn irritable in summer, and by winter, crime rates skyrocket exponentially.
For nearly a hundred years, there have been no more than two crimes a year. Police officers have long been replaced by mechanical police. One cop can manage a huge area. But this winter, within a month of the season's start, over a hundred crimes occur. Local police forces are stretched thin; mechanical police are of little help. Temporary security teams have to be mobilized.
After entering the New Century, the military systems of all countries are abolished. Each region only retains partial self - defense forces, and none are equipped with heavy weaponry.
Only regions directly under the United Nations are equipped with heavy weapons. In recent years, the peace movement advocates expanding civilization and opposes violence. Also, the United Nations considers that in the era of global unification, thermonuclear weapons are unsuitable for future space battles. Thus, most nuclear weapons and intercontinental missiles—weapons with large - scale lethality—are abandoned. These weapons are converted into energy and consumed, with only a small number retained for display.
Instead, electromagnetic guns, pulse bombs, infrasonic bombs, quantum torpedoes and other energy - based weapons emerge. Weapons with small destruction range, limited killing scope, and high efficiency.
In the spring of the 451st year of the Star Calendar, calm returns, as if last winter's crimes never happened. But many people are in low spirits, rarely showing other expressions—like having facial paralysis. Perhaps everyone is still shaken by last winter's events.
In the winter of the 452nd year of the Star Calendar, the world seems on the verge of destruction. People go mad, burning, killing, and looting in the streets, frenzied with excitement.
They rush into street shops, government buildings, and security team barracks. Moreover, they become impervious to regular weapons; only pulse bombs can stop them. Ordinary security teams are only equipped with electromagnetic guns, not heavy weaponry. Region after region falls. Countless people in space cities flee via spaceships.
In the 460th year of the Star Calendar, the surviving humans all flee to Earth. An underground metropolis is built 1000 meters below the Earth's surface. The human population is only tens of millions. The "mad" people number nearly 10 billion. They're extremely hard to kill. Even if the space cities' ecological circulation systems are shut down and the safety shields opened to expose them to space, they survive.They also use the main guns of space warships to bombard those space cities. Although some are killed, the effect is minimal. Blown into space, they still survive. The parasitized people even have the ability to move slowly in space. Then they climb onto warships and damage the engines. Warships are already scarce, and most haven't had time to leave space ports. Only a handful remain.
In the 465th year of the Star Calendar, genetic scientists finally discover the cause of human mutation. It's the snow in the 450th year—it's not snow at all, but space dust, including space hail hidden within. When not in contact with life - forms, they stay in an inert state, undetectable. Once in contact with life - forms, they quickly dissolve into them and become part of the life - forms. This behavior is called "parasitism."
After parasitizing, it takes nearly 2 years to modify the host—infinitely amplifying the host's dark side, leaving only a bloodthirsty and brutal nature. They can also strengthen the host's body, making its hardness reach 38 HRB on the Rockwell scale—the hardness of high - strength steel.
The parasitized have grayish - white skin, stiff limbs, no obvious personal consciousness, and slow reactions. Their body temperature is close to 0°C. They attack all warm - blooded life - forms. They don't cause secondary infections. Their cell activity is far higher than that of ordinary people, with extremely strong recovery ability. Their muscle strength is about 2 to 3 times that of an adult.
Code name—Death Warrior!!!