If civilizations achieve a certain sophistication, they necessarily decipher the purpose of the universe and once they understand its true meaning and that they are just a superfluous side-effect, they simply commit suicide. Here is a blog entry of mine elaborating on this hypothesis:
Here is another variant:
If civilizations achieve a certain sophistication, they necessarily decipher the purpose of the universe and once they understand its true meaning and that they are just a superfluous side-effect, they simply commit suicide. Here is a blog entry of mine elaborating on this hypothesis:
http://arachnism.blogspot.com/2009/05/spiritual-explanation-to-fermi-paradox.html