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The Great Filter: Humanity's Ultimate Test or a Mere Hypothesis?


Uncrowned Guard

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The universe, with its billions of stars and potentially even more planets, poses a perplexing question: If there's a high probability for intelligent life to exist elsewhere, why haven't we encountered any signs of such civilizations? This conundrum is known as the Fermi Paradox. At the heart of this paradox is the concept of The Great Filter. This hypothesizes that there is a significant barrier or series of barriers that prevent the vast majority of life from developing into an advanced, space-faring civilization. Such barriers could range from the emergence of simple life from non-life to the ability of advanced civilizations to avoid self-destruction.

Given the vastness of the universe and the potential for life, some argue that humanity might have already passed The Great Filter, suggesting that the emergence of intelligent life is exceptionally rare. Others believe that the most challenging hurdles are still ahead of us, implying potential existential threats to our civilization. 

What's your take on this cosmic mystery? Have we already surpassed the most significant challenges, or are the most daunting trials awaiting humanity's future? Dive into the debate, discuss the validity of The Great Filter hypothesis, and ponder our place in the vast cosmos.

What is the Fermi Paradox?

The Fermi Paradox is the apparent contradiction between the high probability estimates for the existence of extraterrestrial civilizations and the lack of evidence for, or human contact with, such civilizations.

To break it down:

Numerous Stars: There are billions of stars in our galaxy alone, many of which are similar to our Sun and have been around much longer than our Solar System. Given the vast number of these stars, it's likely that many of them have Earth-like planets.

High Probability for Life: Assuming Earth is not especially unique, some of these Earth-like planets should have developed intelligent life. Some of these civilizations might develop interstellar travel, a step humans are investigating now.

Time Factor: Even at the slow pace of currently envisioned interstellar travel, our Milky Way galaxy could be completely traversed in about a million years, a mere blink on cosmological timescales.

Given these factors, Earth should have been visited by extraterrestrial aliens, or at least we should have detected signs of their existence. But we haven't. 

Enrico Fermi, a physicist, during a casual conversation in 1950, famously asked, "Where is everybody?" This question highlighted the paradox: Given the high likelihood of extraterrestrial life existing, why do we see no sign of it?

Various hypotheses have been proposed to explain this discrepancy, ranging from the idea that advanced civilizations self-destruct, to the possibility that they are avoiding us, to the notion that we're simply not looking in the right way or at the right time. The concept of the "Great Filter" is one of the proposed solutions to the Fermi Paradox, suggesting that there's a stage in the evolutionary development of life that acts as a barrier, preventing most life from becoming an advanced, space-faring civilization.

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Excellent question! 

I genuinely don't know the answer... I do lean towards there being a Great Filter [i]somewhere[/i], but whether it's ahead of us or behind us is anyone's guess. It's not like we've found advanced life (or any life at all) elsewhere in the universe - but then, there are obvious candidates for Great Filters in our near future (an AI that outsmarts and enslaves us being one example of such). 

Or it could be that all the aliens just stay on their home worlds, because space exploration is either too dangerous or too expensive 😛

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7 hours ago, Kyng said:

Excellent question! 

I genuinely don't know the answer... I do lean towards there being a Great Filter [i]somewhere[/i], but whether it's ahead of us or behind us is anyone's guess. It's not like we've found advanced life (or any life at all) elsewhere in the universe - but then, there are obvious candidates for Great Filters in our near future (an AI that outsmarts and enslaves us being one example of such). 

Or it could be that all the aliens just stay on their home worlds, because space exploration is either too dangerous or too expensive 😛

 It does feel like most of our great challenges are going to arise in the near future. A rogue AI, nuclear war, climate change, environmental destruction, and so many more possibilities are fueled by tech that we've either just invented or are on the verge of creating.

It is inspiring to see humans create such impressive and nearly unbelievable concepts and machinery, but it's also a bit of a downer knowing that our past sufferings might only be a pretext for what our species has in store for ourselves.

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  • 3 months later...

I'd say it's a high probability situation, but it's the same chance that we can't reach it.  Since we can't reach it, we are deceived into thinking it isn't there.  Well, we'd have to reach life speeds to maybe reach it.

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On 10/20/2023 at 6:04 AM, Uncrowned Guard said:

 It does feel like most of our great challenges are going to arise in the near future. A rogue AI, nuclear war, climate change, environmental destruction, and so many more possibilities are fueled by tech that we've either just invented or are on the verge of creating.

It is inspiring to see humans create such impressive and nearly unbelievable concepts and machinery, but it's also a bit of a downer knowing that our past sufferings might only be a pretext for what our species has in store for ourselves.

I have always been of a candid opinion that technology will be the end of us with the way the world of focused on technology advancements. I know that there are some concerns about the climate change and how it's going to cause environmental destruction but that may not happen before we end ourselves with technology. 

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