Anyone read "Cosmic Memory" by Rudolf Steiner?
According to him, we,ve been there,(telepathy etc) and it is because we are coming from energy to matter, basically degenerating from energy, etheral to matter, physical.

I personally think humankind has had at least 6 other "highpoints" of civilisation, then some recurring catastrophe wiped them out and here we are again, boldly poised at the next pinnacle. These may probably never be found
depending on how far back, and how deeply buried.