It's a fascinating video, and the book is even more amazing. I highly recommend it.
MY LAST EDIT:
The “elites” in every culture kept many advanced techniques / knowledge to themselves. How else could they separate themselves from the peasants?
Many people died as a result of their “experiments”
Someone had to taste the unknown berry on a bush and it was for certain it was NOT the elites.
Still others were sacrificed to their “gods”
Many cultures built giant stone structures..USING SLAVE LABOR..Nearly all of them have to shown to be a result of leverage or some other reasonable technique. Still, they were quite clever.
They built mechanical devices that compared to today’s technology were little more than coin operated music boxes. But to the average villager they seemed like magic or inspired.
As for their knowledge of the stars and the seasons..they spent a large part of their lives outside observing and marking events.
They observed that the sun was at a certain point in the sky every year and built observatories for such events.
What happened were those $#@! apes took over the planet and enslaved man.... or am I remembering some over time?