I am convinced that we&#x27;re the first&#x2F;only space-capable species in our galaxy by the simple absence of killer self-replicating interstellar robots.  I&#x27;m serious.  Anything that&#x27;s remotely possible becomes inevitable on these astronomical scales, and all it takes is one jerk making one self-replicating killer robot and that&#x27;s it for life for the rest of time in the galaxy.