Gregory's ServerI disagree: a society capable of interstellar travel is one that finally figured out peace and prosperity. Put it this way, suppose someone were to get their hands on a warp drive here on earth; you can bet that it would eventually fall into the hands of someone who set it off just to kill millions. We won't be able to go all Star Trek until we stop producing those kinds of people.
@kingbeauregard @gdinwiddie It might also fall into the hands of people who would zoom off to conquer another solar system or many.
If that is physically possible, it has probably happened before, and it was the equivalent of COVID or the plague on a cosmic scale. There is no defense against a relativistic projectile. You don't see it coming in time to do anything.
If aliens in UFOs really are watching earth, with special attention to the military tech, that's probably why.