We are not going to meet E.T, and this is good news.

The revelation of UFO videos allows us to return to one of the biggest questions we have ever asked, I am going to tell you about why we may never contact aliens and that, most likely, it is very good news .

The search for extraterrestrial life is not an exclusive field of science fiction movies and books, scientists from all over the world have dedicated their lives to answering this question and of course the possibility of a galactic society has been debated.

The first concept is the Kardashov scale, proposed by the Soviet Astrophysicist Nikolái Kardashov, which measures the degree of development of a civilization based on the domain of resources, and therefore proposes three types of civilizations:

A type I civilization would dominate the resources of its planet, a type II civilization would completely dominate its planetary system and in type III that of its galaxy. Currently our civilization is close to using 73% of our planet's resources, so the eminent scientific promoter Michio Kaku suggests that human beings could reach Type I in 100-200 years, and Type II in a few thousand years, and Type III between 100,000 to one million years

Although Kardashov did not raise them, there are those who have proposed a type IV civilization that dominates the universe and a type V that dominates the multiverse.

Frank Drake in 1961 calculated that there would be about 10 contactable civilizations in our visible universe and about 100,000 intelligent civilizations, in what was called the "Drake equation" a mathematical expression with so many unknown variables, that true it is difficult to say that its result is true , but which is normally used as a reference.

However, we have been searching for years and have not heard anything so where is everyone? Once we have explored our planetary system and have not found intelligent life, our options are, to find a civilization in another social system or that some civilization in the process of galactic expansion finds us.

Robin Hanson, in 1996 stated that an interplanetary civilization would be highly improbable, given all the steps that you would have to take to go from the rising of a star to a universal civilization, which would be the following:

Hanson described 9 steps

1. A suitable star system with habitable planets,
2. Reproductive molecules,
3. Unicellular life,
4. Complex single-cell life,
5. Sexual Reproduction,
6. Multicellular life
7. Animals with large brains.
8. our current stage and
9. Colonization explosion.

According to this hypothesis, at least one of these steps has to be improbable and would represent a "great filter" for the construction of a galactic civilization. If some of the above steps were easy, we would already have news of other civilizations, and the universe is likely to be full of civilizations in our current state, but none have been able to colonize the galaxy.

The overwhelming side of this thesis is that it implies that the "big filter" is in our future. The discovery of single-cell life on other planets would confirm a high probability of life on other planets, but would make planetary colonization unlikely.

Jacob Misra and Seth Baum proposed in 2009 that the great filter is in our future given that according to the time necessary to achieve such a civilization, society would collapse due to lack of resources before achieving the ability to colonize its planetary environment.

On the other hand, the mere existence of a galactic-type civilization would endanger ours, which would be seen as a mere resource for the other, so it is convenient for us to hide. this was raised by Stephen Hawking.

We cannot forget the function of time. The universe is about 13 million years old and life on our planet about four billion and human life just over a million years old, it is possible the existence of a galactic society that lived and died out a billion years ago, without that we have news or that we are called to populate an empty universe, although it seems most likely that there are simultaneously civilizations of our same level and that the time it takes us to contact is greater than that of the life of our civilization.

If our plans to colonize Mars are successful, we could be on the way to consolidating ourselves as a planetary society, but it will also mean that the "big filter" is not there and that they are looking for us from elsewhere.

That is why some argue that when we seek life in space, some civilizations have already decided to hide and that is why we do not listen to them, there are theories about it that we will leave for another post. about how these civilizations would hide and why it was a bad idea to be sending signals into space.