On Wednesday, February 7, 2018 at 6:48:56 PM UTC-7, agrays...@gmail.com wrote: > > > > On Wednesday, February 7, 2018 at 5:27:39 PM UTC-7, Brent wrote: >> >> >> >> On 2/7/2018 4:38 AM, Telmo Menezes wrote: >> > To summarize the argument: >> > >> > 1. A sufficiently advanced civilization is bound to become a galactic >> > civilization; >> > 2. We do not observe a galactic civilization; >> > 3. If other instances of life are found, this means that life is not so >> rare; >> > 4. So it is likely that there is a major obstacle that prevents a >> > civilization from becoming galactic, and this filter is likely to be >> > ahead of us. >> > >> > It's an interesting argument but I think it is based on some rather >> > strong assumptions: >> > >> > (a) That becoming a galactic civilization is possible; >> > (b) That becoming a galactic civilization is desirable; >> > (c) That galactic civilizations are observable by us. >> > >> > Firstly we don't know if there's an upper limit for technological >> > progress, or where that limit could be. Maybe interstellar travel or >> > the colonization of other planets will never be feasible. >> >> That would be my bet. Galaxies are big and light is slow, and we're a >> lot slower. >> >> Brent >> > > *I agree. In empires of our historical experience, Persia, Greece, Rome, > and into the modern era, the motivation was virtually always economic; > securing scare resources and establishing trade routes. If the SoL is a > limiting speed, I see no motivation for advanced beings to establish a > galactic empire. AG * >
*Moreover, if they seek Earth-like planets in the habitable zone, there must be plenty in existence where human life, perhaps any life other than the most primitive, hasn't evolved. So, I don't see them trying to exploit Earth inhabiting humanity. AG * > >> > Secondly, we >> > are assuming a lot about a civilization that would be dramatically >> > ahead of us both culturally and technologically. Maybe galactic >> > civilization is a silly goal, and we don't even have the mental >> > constructs to comprehend why or what the good goal would be. Finally, >> > maybe a galactic civilization does exist but does not wish to be >> > detected by the likes of us. >> > >> > I would say that there are too many unknowns for which we don't know >> > how to assign probabilities. >> > >> > Telmo. >> > >> > On Sat, Feb 3, 2018 at 6:20 PM, John Clark <johnk...@gmail.com> wrote: >> >> https://www.youtube.com/watch?v=UjtOGPJ0URM >> >> >> >> >> >> John K Clark >> >> -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.