I haven't read much Hancock to be honest and the fact that he gets so much time on Joe Rogan's show makes me suspicious because I think Rogan is in bed with the CIA. The alt archaeology scene is a rabbit hole beyond rabbit holes and chalk full of disinformation. That being said I think that Sepher and Hancock are both correct in their assessment that the bulk of megalithic sites are remnants of very advanced pre flood civilizations. I do not believe in the linear or 'progressive' development model pushed forward by mainstream academics. I do not believe that hunter gatherers were building these sites (maybe occupying them but not the original builders). I strongly believe that humans repeatedly created advanced societies and were wiped out or reduced to small numbers by extinction events. These floods were most likely a result of the sun going mini nova (on a regular basis) and causing a pole flip. This is also why so many religions were sun worshipers. Not because the sun gives life but also because it brings extreme catastrophic death. I think the ancient sky was also full of a lot more plasma and planetary activity and that modern symbology (like the swastika and star of David) deride from this.

I've been trying to push this series of blog posts out to the dissident community but without much luck. I think there's something very real and very scary going on with secret societies today. I think they are holding very ancient knowledge from the public. This blog series goes deep on that:

http://saturndeathcult.com/the-sturn-death-cult-part-1/