When you say great harvest are you referring to negative polarity beings using Earth to generate an overall negative "soul", so to speak, for the harvest? I've looked a little into the law of one but I'll go brush up on the Ra material.
I read somewhere that you can see when humanity discovered math, writing and agriculture and it led to a population explosion. In my opinion, this is when were visited by "aliens" and taught these things. The sad thing is in the anthropology world, if you suggest anything like this, you will not get funded and it will lead to your career becoming stagnant. This is why we cannot excavate under the Sphinx, nor go check out the pyramids next to Cuba. Its a shame really, but in this forum we all know the reason. Telling the public that we used to have incredible technology beyond our imagination, religion was founded on visits from (my assumption) our ancestors, we have been visited by "aliens" and that we have potential way beyond our understanding, would lead to everyone simultaneously losing faith in the debt slavery system. Mass protests and riots against the church and state, and people no longer willing to be cogs in the machine. I can only dream of it.
Atlantis, Lemuria, and Agartha refer to three different potentially lost civilizations. I do agree with you though. The size of the slabs in the Giza pyramids, Gobekli Tepe's incredible stonework, the pyramids underwater next to Cuba, large stone buildings revealed when water receded due to a tsunami in India, and the numerous yet timeline verifiable ancient stories of lost civilizations with incredible technology, lead me to say "yes, there was absolutely a lost civilization with advanced technology before us". I personally believe that Earth has a geomagnetic pole reversal every ~13,000 years which allows the magma within to come out to the surface while simultaneously making Earth vulnerable to CMEs. It is also possible that these same people who lived in this timeline knew about the impending doom and fled to Mars, then came back and retaught humanity, but were seen as gods. I apologize for rambling, I wanted to get my thoughts laid out for myself.
Rofl the Hidden Hand interview was one of the first things I was introduced to. To me, the dimensional aspect makes sense, it aligns with eastern philosophies in most ways and promotes positivity, but I want to ask you, what did you read where you became convinced? Because when I read that interview, I got the impression that whoever wrote it is using this "religion" as a scapegoat to go out and do harm. I've always imagined the very top of the illuminati (whatever you want to call them) to use this method to control the lesser people in the pyramid of esoteric societies. Freemasonry is without a doubt satanic in nature, the Illuminati itself can be traced back to Lucifer worship in the name alone, wouldn't it make sense to convince those that you use to control the world to believe in this and therefore have power over them too?