There is a lot of evidence that points to previous advanced “modern” civilizations. Too bad it’s all been wiped clean. Who knows what troves of historic/designs/inventions were lost in the books at Alexandria, and Constantinople. Such waste. Humans could have died off at the peak of a civilization much like ours and we will never know.
And what troves were lost in the destruction of Inca, Maya, Aztec, etc. records here in the Americas!
Or has been deliberately hidden in the deepest basements of the Smithsonian - much by Smithson himself.
See Back and Current issues of Ancient American for the huge amount of stuff found in the US that is never talked about.
Just checked the link I was going to post, but is not working - was basically just one guy doing the publishing, and he may have gone under.
Our landfills will testify to our civilization for thousands of years.