They had many highly technical advances , I see Google has moved the sumarians for several millions of years ago to just 4000 . They would have had the tech to cause their own demise like gates is trying to do here.
A couple of years ago, I stumbled upon the wiki entry about sumerians blood lines/royalty
Interesting read https://en.wikipedia.org/wiki/Sumerian_King_List
Staring with the dynasty of Hamazi https://en.wikipedia.org/wiki/Sumerian_King_List#Dynasty_of_Hamazi stuffs are pretty "normal", it's reign after reigns, spanning over 12/20 years (6 to 90) on average.
But before that...https://en.wikipedia.org/wiki/Sumerian_King_List#First_dynasty_of_Kish
Now you're entering the realm of "what the fuck"...
https://en.wikipedia.org/wiki/Sumerian_King_List#Antediluvian_rulers
En-men-lu-ana 12 sars (43,200 years)
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