If aliens come, can humans hide if they can't defeat them?

This article is based on answering similar questions from netizens: If aliens come, where can humans hide? Such questions are very strange, just giving people room for free play, and there is no standard answer.

However, since many people like this topic, Space-Time Communication will join in. The answers may contain some scientific common sense, but they are not rigorous. They are only for discussion to see if they can help some friends sort out their thoughts and solve their doubts.

First of all, we need to understand why humans should hide when aliens come.

The vast majority of netizens believe that aliens are evil, mainly due to the influence of the "Dark Forest Law". The so-called Dark Forest Law is a theory described by Liu Cixin in his science fiction novel "The Three-Body Problem". The main core is that there is a Dark Forest Law in the universe, that is, all civilizations exclude the existence of other civilizations, and once other civilizations are discovered, they will be destroyed.

It's like in a dark forest, all civilizations are hunters, hiding in dark disguises, holding hunting rifles, and once they find their prey (other civilizations), they will preemptively shoot. In the novel, Liu Cixin describes a "singer" civilization, who casually scan the universe while singing untuned nursery rhymes. Once they find signs of civilization, they will erase them without verifying whether they are true or false or good or bad.

In the novel, the civilization that is one level higher than the Earth is the "Three-Body" civilization. The Three-Body people sent a fleet to conquer the Earth. In order to protect their homeland from destruction, humans sent the coordinates of the Three-Body people into the universe. The Singer civilization quickly discovered the Three-Body civilization by following the coordinates, and they destroyed the Three-Body world by casually throwing out a light particle.

Later, this civilization discovered the Earth civilization and casually threw out a two-dimensional foil, like a playing card without thickness, which floated to the solar system, causing the solar system to suffer a dimensionality reduction attack, disappearing from the three-dimensional world into the two-dimensional space and returning to extinction.

According to some people's analysis, the "Singer" civilization is only an advanced stage of the second-level civilization. Above it are the "four-dimensional" civilization and the "zero-returner" civilization, each one more advanced than the other. Their level of civilization and means of attack are difficult to describe.

According to this theory, once humans are discovered by aliens, and these aliens are much more civilized than humans and have the ability to come to Earth or attack Earth, then humans will be doomed.

Many people in the world believe in the Dark Forest Theory, and even some scientists believe in it. For example, the late physicist Stephen Hawking also believes that aliens have bad intentions. Therefore, in the novel "The Three-Body Problem", there are two famous sayings that are widely circulated, that is, "Don't reveal the coordinates of the earth" in the universe, and "Don't answer calls from aliens." These two views are accepted by many people in the world and they are constantly warned.

The Three-Body Problem is very good. I like it very much and I admire Liu Cixin's imagination and his ability to weave stories. But this does not mean that I agree with the views in it. Novels are novels after all, and they do not represent the universe as it really is. I believe that all current human imagination, including the vast majority of science fiction works, only stays in the current ideology of human beings. Therefore, the Dark Forest consciousness is actually a manifestation of certain consciousness of modern humans.

As civilization improves, will civilizations that are one level higher than human civilization or even higher still think in this way? I can't be sure, but I think at least I can't be sure that it is this kind of dark forest thinking. My inference is that as the level of civilization improves, civilizations should have more tolerance and win-win awareness, and the history of human civilization development has already demonstrated this.

When we reflect on human civilization, from primitive race wars to ancient slavery and separatist wars to the modern United Nations, isn’t it a process from bloodshed to gradual tolerance? If cosmic civilization really develops in this way, why would higher-level civilizations attack us? And why should we hide?

Secondly, if aliens come, can humans hide?

According to the Kardashev Civilization Index theory, human civilization has only reached level 0.73, which is still a long way from level one civilization. Some scientists believe that it will take about 200 years for humans to reach level one civilization and about 5,000 years to reach level two civilization.

The level of civilization is marked by the ability to control and use energy. The energy used by a level one civilization is equivalent to the total energy of a star shining on the mother planet. At this level of civilization, one has the ability to control all the energy resources of the mother planet and move within the influence range of the star at this level. As humans on Earth, if we reach level one civilization, the energy we use can reach about 1.74*10^17 J/s, and we can control and use all the resources of the Earth, move within the solar system, and migrate to nearby planets.

When reaching the second-level civilization, humans will be able to control and utilize all energy and resources in the solar system, including all energy from the sun. The energy usage will reach about 4*10^26 J/s. Humans will be able to move around and migrate to any planet in the solar system, and can also move around in nearby star systems, such as exploring and migrating to Proxima Centauri.

In this way, if aliens really invade the earth, this civilization must be at least a Level 2 civilization, and its interstellar navigation capabilities and weapon equipment capabilities are far beyond the reach of humans. If such aliens come, where can humans hide?

If you want to escape, can you outrun their spaceship? If you want to hide underground, do you have the ability of a Level 2 civilization to dig underground? Therefore, I think if aliens with Level 2 civilization or above really come to Earth, no matter where humans hide, whether in the sky, underground, or in the sea, they can be caught. They don’t even need to do it themselves, they can send a robot dog to bite you out.

Or there is no need to catch them at all, as long as we send out some kind of sound waves, we will come to them obediently to report. If we encounter a higher civilization like "Singer" or even "Fourth Dimension" or "Zero Returner", and the earth and even the solar system are gone with a wave of the hand, where can humans hide? In other words, if you can avoid the attack of such a civilization, you have the ability to fight against it, and your civilization level is no longer 0.73.

So, don't be fooled by science fiction movies and TV shows. If civilizations of different levels are really hostile, there is no such thing as confrontation. During the War of Resistance Against Japanese Aggression, the Japanese devils were equipped with more advanced equipment than the Eighth Route Army, but the Eighth Route Army was able to win the war because their civilization levels were at the same level. The devils were rampant for a while, but they were just laying a cushion on the floor, and their level was just a little higher.

If there are aliens, and if their civilization is at the same level as human beings, or just a little bit higher, they will not be able to come to Earth to cause trouble for humans; if their civilization is one level higher than humans or even higher, then humans will have no need to hide and will only be slaughtered and destroyed.

This is a bit like the war between humans and ants. Even if ants hide underground, people can dig them out with an excavator, or just smoke and pour some water into the hole, and the ants will die. Of course, ants can also hide in places where humans can't find them, such as hibernating in the depths of a primeval forest.

But it's not that ants can avoid it, but that humans don't want to kill them. If humans want to kill all the ants, they can do it with their current capabilities. Of course, after doing that, the earth may not be habitable. But the earth is not the home of aliens. If aliens want to destroy humans, it's not a pity to destroy the earth.

So, my point of view is: high-level aliens will not easily become enemies with humans. If they come, they are more likely to be friends. If high-level aliens really invade the earth, humans will not be able to hide, so there is no need to hide. What do you think about this? Welcome to discuss and comment.

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