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[quote=Anonymous]https://web.archive.org/web/20110810083732/http://jgmatheny.org/extinctionethics.htm If a benevolent, advanced extraterrestrial civilization exists, then it is probably distant. We would waste some fraction of remaining starlight if we waited for them to reach this region of space. There are around 10^13 stars in the Virgo Supercluster and, assuming each star could provide enough energy to sustain 10^10 sentients... our Supercluster could support 10^23 sentients. If we are not at the leading edge, and there are extraterrestrials more advanced than we are, then they are probably either not benevolent or not nearby. Otherwise, it is hard to fathom why they haven't intervened (overtly or covertly) in Earth's affairs to prevent the mass of suffering on this planet.[/quote]
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