I went to a private school. We had typical "manifest destiny" history text books, but those same text books had entire paragraphs 🤣 dedicated to Sumerian culture... I always thought the pictures of the ziggarats were extremely interesting. They did with baked clay, what other cultures did in stone. What amazes me is that these "mud" structures still survive until today... This culture is an eon before the megalithic cultures. Truly amazing and also with fully developed writing and detailed daily business transactions preserved for so long... We have no idea of what has been lost... Thank you for sharing.