They did this..thousands of years ahead of the Egyptians ...choosing a more "Freindlier version" of passing the knowledge...one may comment..they were more succesfull than the Egyptians..as their languages and stories are still sung and danced to ..to this day...and we are aware that the Egyptian language went nearly extinct..that the message in their labour..has only been discovered..recently.
Critical study reveals man has learned this in seperate hemispheres..independently...some like to credit an advanced culture for spreading the news so to speak..but real archeology..reveals they got it on their own.