Sumer
Sumer () is the earliest known civilization in the historical region of southern Mesopotamia, modern-day southern Iraq, during the Chalcolithic and Early Bronze ages, and one of the first civilizations in the world along with Ancient Egypt and the Indus Valley. Living along the valleys of the Tigris and Euphrates, Sumerian farmers were able to grow an abundance of grain and other crops, the surplus of which enabled them to settle in one place. Prehistoric proto-writing dates back before 3000 BC. The earliest texts, from c. 3300 BC, come from the cities of Uruk and Jemdet Nasr; early cuneiform script emerged around 3000 BC.
Proto-Arabic
Proto-Arabic is the name given to the hypothetical reconstructed ancestor of all the varieties of Arabic attested since the 9th century BC. There are two lines of evidence to reconstruct proto-Arabic:
Old Arabic in the Nabataean script is first attested in the Negev desert in the 1st century BC, but it becomes more frequent in the region after the decline of Safaitic and Hismaic. From the 4th century AD, Old Arabic inscriptions are attested from Northern Syria to the Hejaz, in a script that is intermediate between cursive Nabataean and the Kufic script of Islamic times.