A Rationale for Proposing an Interstellar Arrival Sentinel

In the universe, the possible singularity of terrestrial life, consciousness and intelligence has consequences for how the human race might regard responsibility to its distant inheritors. The apparent opportunity of part of the universe to manipulate its own environs is, so far as is known at present, subject to possible extinction by a catastrophic space object collision with Earth. Attention has thus far been focussed on objects in solar orbit, but an equally catastrophic threat is posed by an as yet poorly understood population of interstellar objects. This is the rationale that suggests provision of an interstellar arrival sentinel as part of a reasoned approach to planetary safety.