Business Insider has the article There’s a compelling explanation for why we’ve never found aliens — and it could mean humanity is doomed.
A study recently published in the journal Astrobiology suggests there are four different scenarios a civilization can follow as it develops. One of those four pathways leads to sustainable existence. But in the other three, civilizations overuse resources and collapse or die off as a result.
The article also links to the YouTube video Could Alien Civilizations Predict the Fate of Our Planet?