Survival is the first need of civilization, civilization is constantly expanding and growing, the total mass of the universe remains the same, but the entropy is constantly increasing.

In addition to these two points, there are two other concepts, the technological explosion and the chain of suspicion.

Cosmic sociology is also sociology, which is the same as what Luo Ji has learned.

Then, the matter is relatively simple, that is, the earth and the three-body problem are analogous to the two civilizations on the earth, such as Chinese and Western civilizations.

It took tens of millions of years for sea creatures, 100,000 years for Australopithecus to evolve into modern Homo sapiens, and the history of mankind has not developed for 7,000 years.

In the past two hundred years in modern times, science and technology have developed at an unreasonable speed.

This is very accidental, even in the West, the original science is just the amateur interest of rich boys.

Astronomical telescopes with improved glass made it possible to call into question the religion that represented the geocentric doctrine.

And the royal power seized power with the help of science, and the common people who were liberated from religion quickly liberated their nature, which promoted the development of capital.

Capital's profit-seeking nature has rapidly made use of science and technology.

Such a cycle will be interrupted if it is only one step away.

And the East, which is thousands of years ahead of the West, is missing this initial link, which is the explosive development of technology.

Of course, there are not just a few civilizations in the universe, but countless ones.

Within the scale of the universe, those civilizations will not have the same possibility of communication as civilizations in the East and the West.

They will only be like the scenery in a space telescope, just a somewhat anomalous gray spot.

These civilizations, like the desert and the sea, may be cut off from civilizational communication, but once discovered, then war is inevitable, as history has proven countless times.

In addition to the pursuit of resources and wealth, the causes of war are also diverse.

For example, the language is singular, the emperor of the land of the rising sun? Then let's fight.

Do you want to be a brother state in the Western Regions? Then let's fight!

Do you have a crush on my woman? Then let's fight!

You have killed the pigs of our people? Then let's fight!

Do you have what it takes to jeopardize my supremacy? You're going to die!

Are you weak and pitiful? Then become a fish and grow my body!

Are you too strong? I'm going to kill you too!

It's not that there is no peace, but that peace is a helpless act that is carried out under the condition of reciprocal war.

Even if the explicit wars are over, the implicit wars, the financial wars, and the cultural wars are still going on.

Luo Ji's thinking is constantly diverging.

Since war is inevitable, why do the Trisolarans come to kill themselves?

Luo Ji is not a technical talent, and he does not have the ability to solve Zhizi and let the quantum research of the earth continue.

So what are the Trisolarans afraid of?

If this is a cosmic war, there must be other civilizations in the universe except for the earth and the Trisolarans, and they are also combatants!

Thinking of this, Luo Ji immediately reacted to the truth of the universe, and he was shocked into a cold sweat.

This was the first time he showed a look of fear, and Luo Ji hurriedly summoned his own escort captain Kante:

"I need a safe place, there is no need for anything but safety, it needs to be fast, and at the same time, I also need to look at the map of the star field within the range of twenty light years on Earth!"

"Doctor, there is no such thing as an absolutely safe place, we can only find a relatively safe place, a traditional underground bomb shelter, but the conditions inside will not be the same as here!" Kanter Road.

Under strict escort, Luo Ji was escorted to a nuclear defense unit, and with the buzz of the elevator, Luo Ji went underground.

When they realized Tomoko, the humans repurposed these abandoned bomb shelters.

In addition to basic computer communication, there were only simple living utensils, and the next day, the astronomer Albert also came in with a star map.

Luo Ji's eyes are very sharp, different from the previous cynicism, and the peace after marriage, Luo Ji has completed his psychological transformation.

"I won't talk about too many pleasantries, I just want to ask Dr. Albert, in the universe, in addition to the Trisolarans, will the position of the Earth be observed by other alien civilizations?" Luo Ji asked.

"No, from the known information, Ye Wenjie used the reflection of the sun to emit two electromagnetic radiations towards the universe, revealing the location of the earth, although the speed is the speed of light, but its communication is not just low-frequency communication.

Even so, there is only an approximate direction and distance between the earth and the three-body problem, and the exact location is still unknown.

Moreover, in addition to the trisolar, the closest star on Earth is α Sagittarius, which is 16 light-years away from Earth.

Even if its planet gave birth to civilization, it has evolved to be able to receive low-frequency communications, but there is a high probability that it will receive a cloud of cosmic noise later!

In 16 light years, that is, whether the sun's light can be stably received or not, the light in the universe, the flow of particles, and the distortion of space, these are all objective and will interfere.

Not to mention that the Earth, which is 1.3 million times smaller than the Sun, will be leaked out of its exact location!

By the standard of the three-body problem, it will take at least nearly 2,000 years for the Sagittarius α to reach the solar system! ”

Dr. Albert said that the Trisolaran is about four light-years away from the earth, and it takes 450 years to come to the earth, and it takes more than 100 years for one light-year, and the longer the distance, it must take more time.

On the scale of the universe, using light as communication is probably like looking at a piece of sand in the earth's desert with the naked eye on the moon, and determining its specific latitude and longitude.

"I see, in that case, how do you mark the position of a star to the universe with the current technology? Can you be sure that someone will be recognized? Luo Ji asked.

"The relative position of stars is important information to determine the position of stars in the universe, with the earth or the sun as the coordinate point, it cannot be observed on a cosmic scale.

Instead, the positions of dozens of stars in a space together form a unique three-dimensional space, which can be identified by people like fingerprints!

Of course, the premise is that he can receive the information of the stellar radio wave emitter, and he must also have a specific map of hundreds of billions of stars in the universe, as well as powerful spatial computing power.

After all, the universe is slowly expanding, and the positions of stars are constantly changing, so they can retrieve them from the database! Dr. Albert said.

"Okay, I need to pick a star!"

Luo Ji looked at the star map in the computer and screened it, picked a star about fifty light years away, and asked Albert to make a star map.

While waiting to communicate with the Planetary Defense Council, the ETO organization received another message from Tomoko:

"Destroy Luo Ji of the Wall-Facing One!"

This is the second time that the Three-Body Man has pursued Luo Ji, and for this reason, the ETO organization has thought of many plans, and finally selected a new technology.

Genetic missiles.

This is a specific attack on individuals with specific genes, and the virus is like the flu to the rest of the population, only in certain individuals, and can quickly cause coughing up blood and respiratory failure.

Among them, Zhizi not only helped improve Luo Ji's gene fragments, but also improved Luo Ji's specific position, and such a direct shot made the ETO people more and more serious.

Luo Ji, who was in the middle of the underground nuclear defense, found that his guards had a little cold, but he didn't pay much attention to it, he was explaining his plan.