In order for the hypothesis that aliens provided humans with the idea to build the pyramids to be true, there would have to be undeniable evidence to support it. Just like any other hypothesis, it can only be true if it is tested and proven to be true. Otherwise it jumps from hypothesis to theory, and as we know, a theory is the best possible explanation with the given evidence. A truth is completely undeniable.

For me personally to believe aliens were responsible for the pyramids, I would need a spaceship to come down and for a gaggle of little green men to confess in detail. However, archaeologically speaking, in order for the hypothesis that aliens built the pyramids to work, there would need to be heaps of proof in the record. I’m no expert but I’d think there would be some form of documentation of these aliens teaching humans the way to build the pyramids. If there was real tangible description of little green men coming down from the sky to show humans how to build the pyramids, that would certainly make me question things as they are now.

I think more abstractly, the development of the pyramids would look much different. We can see in the record now that the first pyramids started small and looked much different. There were mistakes, like the bent pyramid of Snefru, that show building the pyramids was trial and error, that people learned from their mistakes and continued to engineer based on what they learned to do better. If some magical alien architect with a keen eye for sandstone and geometry came down from the stars to give its blueprints to the human race and help them make its vision a reality, then I don’t think we would see the progression over time of the development of the pyramids. The record in the case of alien intervention would look a lot more like: no pyramids or similar architecture whatsoever then BAM a perfectly constructed pyramid out of nowhere covered in hieroglyphs about aliens!

In a similar vein, the idea that Atlantis was some kind of super-culture that all other cultures were born from is as equally missing from the historical record. In order for this hyperdiffusionist idea to be true, I would think there would be evidence of Atlantis having existed at all. Assuming, however, that Atlanteans all disappeared and that it makes sense, the evidence that cultures were birthed from this utopian womb would have to be supported in the archaeological record. Instead, the record shows that civilizations like the Egyptians and the Mayans were built from the ground up on the foundations of human ingenuity.

If, and it’s a big if, these cultures came from Atlantis why would they not simply start off as advanced as Atlantis was? This has never made sense to me about this argument. If Atlanteans had flying cars and steam engines and nuclear bombs, why would the cultures born from them be less advanced? The historical record would have to show that somehow this super, more advanced than humans have ever been, culture spread out across the world while losing all knowledge of these impossibly advanced ideas.

I’m not saying the civilizations supposedly coming from Atlantis were not advanced, they clearly were, I’m only suggesting that reasonably, if these cultures came from the Atlantean culture, they would have record of Atlantis’ supposed technology. If all knowledge was lost from Atlantis then everyone in Atlantis had to die and if they did, how did other cultures come from that? I think in order for there to be a hypothesis that Atlantis is a “mother-culture” there first has to be an Atlantis in the archaeological record at all.

Source: https://www.livescience.com/32616-how-were-the-egyptian-pyramids-built-.html