@bookstardust Oooh! I'm going to go through that podcast!
Yeah, I am of the similar view that we underestimated ancient societies.
For me, I started questioning because, for example, we can't build a pyramid without using heavy machinery. And experts are saying the pyramids around the world were built on human strength (slavery or otherwise).
Another is, we can't even duplicate the “Greek Fire”. The secret behind definitely died with the ancient Greeks.
There is also the story that ancient Filipinos never had boats that can travel across the globe, or was unknown until Magellan. Yet, Philippine gold was found as far as Egypt, dated in B.C.E.! And Chinese records state that the first ones who reached their border through the ocean were ancient Filipinos, who taught them how to build huge ships that can traverse the open seas.