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The Great Filter is the idea that, in the development of life from the earliest stages of abiogenesis to reaching the highest levels of development on the Kardashev scale, there is a barrier to development that makes detectable extraterrestrial life exceedingly rare. The Great Filter is one possible resolution of the Fermi paradox.

https://en.wikipedia.org/wiki/Great_Filter

The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life and the apparently high likelihood of its existence. As a 2015 article put it, "If life is so easy, someone from somewhere must have come calling by now."

https://en.wikipedia.org/wiki/Fermi_paradox

Personally I think it's photosynthesis. Life itself developed and spread but photosynthesis started an inevitable chain of ever-greater and more-efficient life. I think a random chain of mutations that turns carbon-based proto-life into something that can harvest light energy is wildly unlikely, even after the wildly unlikely event of life beginning in the first place.

I have no data to back that up, just a guess.

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[–] [email protected] 3 points 6 months ago* (last edited 6 months ago)

Resources often get squandered on trivial vanity and novelty products instead of being channeled into advancing science and medicine. Imagine if we had a cosmic ledger tracking every resource used to develop simple items, like a pencil. It would show countless fires burned and animals consumed just to fuel the human ingenuity required for lumber, materials, and mining. Now, think about how many more resources are required for rockets, heat shields, and life support systems. Extend that to space stations, energy capture, and escaping Earth’s gravity.The resources on a planet are abundant, and nothing is ever truly destroyed. However, we’ve often allocated too much to building flat-screen TVs, leaving little for constructing even a modest space station in orbit, let alone an interstellar spaceship. It's as if the planet offers a finite amount of resources, challenging its inhabitants to focus on space travel. Only a species wise enough to stay on track can unlock the universe's resources. Otherwise, we risk ending up like Australian pines, choking ourselves out in our isolated star systems, having wasted our potential.

Imagine it like interstellar travelling having a single path to achieve it while the path to self destruction is limitless.