A theory of cosmic sociology that states the universe is full of highly advanced civilizations who are both paranoid and aggressive. Each of them will attack and destroy other civilizations on sight while at the same time hiding their own existence as well as possible.
The Singer describes the two important traits almost all civilizations have as genes. The hiding gene is the basic instinct that makes civilizations paranoid and will force them to act as stealthy as possible, knowing that others will attack on sight should they detect them. The cleansing gene is the instinct to be aggressive and exterminate other civilizations before they can strike on their own. Both genes require highly advanced technological development and a good understanding of physics and the universe.
According to the Sophon, it is possible to communicate a safety notice as a civilization, indicating that a civilization is harmless and means no threat to others. A Black Domain would suffice such a notice.