I have some observations about pre-industrial civilization and their relationship to why we don't see evidence of aliens. These observations, which in my opinion were consistent across human history despite very diverse cultures, can apply even to alien cultures.
Because this Great Filter isn't biological, temporal, or even technological -- it's structural and inherent to how civilizations develop in the first place.
The road from Stone Age to Iron Age seems pretty obvious. Humans have independently experienced this phenomenon several times in history. So is the road from Industrial Age to Information Age; not as obvious or dramatic, but going from steamships to spaceships seems to be a pretty inevitable progression, done by polities... (read 811 more words →)
We are NOT in agreement, because I claim that those other three times were NOT possible. They were false dawns that only appear plausible because people think that technological progress, given enough time, can overcome any systemic political barriers.
If you have a biology and/or technology-centered view of civilizational progress, what I say seems nonsensical. Nature finds a way and all and you have so many chances over millions of years. I am telling you that those chances NEVER existed and could never led to industrialization on their own terms.