Contact with an extraterrestrial civilization more advanced than our own could lead to mass existential crises, putting the existence of human civilization at risk:  Almost every human belief system, religious or secular, is based on an anthropocentric outlook. Humanity is the collective center of its Universe; the cognitively aware being that can interact with physical reality not simply by impulse, but by self-aware, conscious agency. Human belief in itself is based upon its conception of dominion over the physical world. Mankind shapes its own environment; while weaker, slower, and smaller than many other species, the intelligence of Man makes Him the apex predator. Mankind's image of itself is compromised by the existence of other intelligent life, especially more advanced intelligent life. It seems that most religious belief systems could not effectively survive with such knowledge, since the existence of intelligent, advanced extraterrestrials seems to imply the nonexistence of a creator God with any active interest in humanity over any other species1. The realization that we are not the center of the Universe could shake many people to their cores, particularly the religious, many of whom would likely find great difficulty coming to terms with that reality. It would be better that humans not seek out such revelations about the Universe. If intelligent life does exist elsewhere in the Universe, better not to invite it to Earth. The cost to people's beliefs and sense of being is too high. 1 Peters, Ted. 2011. "The Implications of the Discovery of Extra-Terrestrial Life for Religion". Philosophical Transactions of the