According to some solutions to the Fermi Paradox - or the question of “where is everybody?” Which implies there are no aliens.
This is not part of the Fermi Paradox: “the answer is that advanced civilizations are deliberately hiding themselves, out of fear of their own destruction”, but of the theory below.
The Dark Forest theory states that every one is hiding because to reveal one’s solar system is to invite death. Best stated in “The Dark Forest” by Cixun Liu. Proposed by Stephan Hawking.
The Zoo theory is nonsense on its face. Too much effort and resources for too little or no gain.
The most terrifying message would be “Don’t Reply”, inferring the Dark Forest theory is a fact.
Dark Forest Axioms:
It is the duty of every civilization to survive, thrive, and grow;
The Universe has finite resources.
Dark Forest Corollaries:
Suspicion of another Civilization’s motives;
A technological breakthrough could happen at any moment.
Dark Forest Implications:
Since no civilization, once aware of another, could trust the other’s motives, and because that civilization is a competitor for resources, and because that civilization, although inferior at the moment, could have a technological breakthrough that would propel it to a superior status, it must be destroyed quickly, without revealing the observing civilization’s location, using a casual strike from some distant point in space, allowing the observing civilization to remain hidden.
Thus, a super dense object could be propelled to near light speed and sent to a civilization’s sun, passing through it, causing a plasma ejection, making the sun nova.
Just because we cannot do something does not mean a civilization thousands of years or a million years older cannot.
Earth delenda est................
“Just because we cannot do something does not mean a civilization thousands of years or a million years older cannot.”
I read something by someone from the 1940’s who said (paraphrased) that ‘the arrogance of every generation is to assume that they will not be surpassed in any way by subsequent generations.’