norseamd
It's best you don't remember your previous incarnations(s) during ancient Sumer. Mythology of its bloodthirsty Zoroastrianism influenced the Judeo-Christian religions and bible (according to Joseph Campbell).
Although…if the lowest point in the 24,000 year yuga cycles (“Platonic Year” or “Great Year”😉 was really around 500 A.D. like S.Y. says, then with regard to humanity’s overall general level of spiritual insight and psychological awareness and understanding, the time of ancient Sumeria’s heyday around 4000 years ago might have been approximately similar to the milieu that prevails in our world today. However, back then it was declining, mankind’s mind was darkening as the years advanced, while now it is on a several-thousand-year gradual climb back up to a somewhat more enlightened humanity.