I have horrible opinions. Everything I think is awful, and here is yet another one;
Sometime in the evolution of every species, the species develops the means for controlling reproduction. They develop birth control, abortion, or whatever.
Any species that doesn't develop reproductive technology endures civilizational collapse as a result of massive overpopulation.
So most species develop birth control.
Because life is basically suffering, sane rational people chose not to have kids, while the insane ones continue to grind out babies.
Slowly the species goes mad, as the nutcases out-reproduce the sane ones.
Eventually it becomes impossible to get anything done. Every time you build a bridge some Islamic nutcase or eco-terrorist blows it up. People begin running over other people with cars. Politicians become insane and pathologically altruistic, letting in millions of crazy Muslims because, "muh ideology." Leaders refuse to to rational commonsense things because "reasons," and "SCIENCE." Speaking of science: science just becomes another word for religion. Bullshit concepts like "equality" and "social justice" command the public's attention instead of survival and common sense. Everyone becomes a gender weirdo practicing self-castration. Women refuse to make babies, and men refuse to be fathers. THE WHOLE WORLD GOES MAD. Every politician becomes a priest. Every teacher becomes a priest. Every corporate leader become a cult leader. People worship their iPhones and it becomes impossible for anyone to think about anything logically because the species is literally going insane.
Oh, right, this is the world we live in.
Copy and pasted from Wikipedia;
The Fermi paradox or Fermi's paradox, named after physicist Enrico Fermi, is the apparent contradiction between the lack of evidence and high probability estimates, e.g., those given by the Drake equation, for the existence of extraterrestrial civilizations. The basic points of the argument, made by physicists Enrico Fermi (1901–1954) and Michael H. Hart (born 1932), are:
- There are billions of stars in the galaxy that are similar to the Sun, many of which are billions of years older than Earth.
- With high probability, some of these stars will have Earth-like planets, and if the Earth is typical, some might develop intelligent life.
- Some of these civilizations might develop interstellar travel, a step the Earth is investigating now.
- Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in a few million years.
- According to this line of reasoning, the Earth should have already been visited by extraterrestrial aliens. In an informal conversation, Fermi noted no convincing evidence of this, leading him to ask, "Where is everybody?" There have been many attempts to explain the Fermi paradox, primarily either suggesting that intelligent extraterrestrial life is extremely rare or proposing reasons that such civilizations have not contacted or visited Earth.
Outcome no. 1: CRISPR Planet
The species also develops the ability to control their own genetics. This opens up the possibility of keeping them sane by simply engineering babies that have no predisposition to madness or religious fanaticism. Of course, by the time the species begins to use the technology it may already be too late. The species may be so crazy that craziness determines how they implement their genetic policies, in which case they try to engineer humans who have a genetic predisposition to communism, religious fanaticism, "social justice," or "equality." They try to make humans that are genetically fair, morally superior, or whatever. But it ends in disaster because the resulting humans are even crazier than them. The species returns to an animal state because it is impossible for it to function technologically with so many people running around who are obsessed with social justice. Everything they do is undermined by a pathological obsession with equality.
Outcome no. 2: World Caliphate
The result of relentless breeding of the insane is the rise of a planetary religious theocracy that crushes all science and returns civilization to the Dark Ages. We don't hear radio waves from these civilizations because they are so religiously fanatical that radio waves are "demonic" and have been outlawed.
Outcome no. 3: Brave New World + 1 child limit
To prevent the madness from spreading, they institute a one-child policy and then grow supplementary people in gestation chambers. This prevents the spread of religious madness and maybe the species survives. On the other hand, maybe it just gradually loses the will to live because without a religious impulse civilization has no purpose. It dies off from atheist apathy.
Outcome no. 4: The return of Adolph
A singular man rises to power over the Earth. He attempts to solve the world's madness through totalitarian dictatorship. Eventually the regime destroys the world in nuclear fire. "We have always been at war with Eastasia," they say as they go to their doom.