According to the Fermi paradox, there are multiple filters and a great filter that civilizations have to pass to keep evolving. What are these barriers?
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There have been many “great filters” that have been proposed in an attempt to explain the Fermi Paradox. Some examples include:
* Life emerging on a planet
* The transition from prokaryotic/single-celled organisms to eukaryotic/multi-celled organisms
* Rapid development of weapon technology
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