Or until the Vogon Constructor Fleet appears.
I personally believe that there are other civilizations out there, because it is difficult to conceptualize a universe that is 14 billion years old, and I have no reason to doubt this because how old the universe is does not bear on the truth of man’s creation imo, yet we are the only creations outside of angels.
However, I do believe that we are being quarantined until the sin issue is resolved.
No need for quarantine. The speed of light sets up a pretty insurmountable barrier to any contact between civilizations. If any others out there exist (and they probably do), it is unlikely there would ever be contact. The best we could hope for is some kind of radio contact. And limiting contact like that would probably be a good thing.
Or until the Vogon Constructor Fleet appears.