'''Sumer''' (or ''Shumer'', ''Sumeria''", "Shinar") was the southern part of [[Mesopotamia]] from the time of settlement by the Sumerians until the time of [[Babylonia]]. The Sumerians may have migrated from the East ([[India]] or ancient [[Persia]]), being unrelated (on the basis of their [[Sumerian language|language]]) to the various groups speaking [[Semitic languages]] in Mesopotamia and The [[Levant]]. Although their exact arrival date is unknown, they seemed to exist in the area as a minor agricultural and organized civilization as early as the 5th millennium BC. The Sumerians were important because of their innovations. Their poor ___location in the flood plains and swamps forced them to innovate. Their [[cuneiform]] script was perhaps the earliest form of writing and their literature has been described as the "earliest that can still be read".