Origins of Writing
Clay tablets with Sumerian cuneiform (incised wedge writing) dating to about 1750 B.C. were recovered by the University of Pennsylvania excavation at Nippur (Iraq, ancient Mesopotamia). Among them was a catalogue of literature dating to at least 2000 B.C., indicating that writing had been invented and literature had been produced back into the 3rd millennium B.C.
Egyptian hieroglyphic was an independent development, but Akkadian syllabaries borrowed from Sumerian ideograms.
(The Origin of the Bible: Newly Updated by F. F. Bruce, J. I. Packer, Philip W. Comfort, and Carl F. H. Henry, 2020. Literature in Bible Times by Milton C. Fisher, Page 101-102.)