This is downvoted but it's also true. It's really impressive what they were able to build and figure out with the tools available too them. (This isn't a great example, but let's put that aside.)

Now, they also believed the mind was porous and spirits could flow in and out of your head, that you could predict the future by looking at bird patterns, and other nonsense. But then again, have you talked to any Wellness enthusiasts lately?

So yeah, this is pretty cool, but it's also a warning. Everything people did a few centuries or a millennia ago is still in human nature.