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.
History of writing
The Middle Bronze Age Indus script, which dates back to the early Harappan phase of around 3000 BCE in the Indian subcontinent corresponding to northwestern India and what is now Pakistan, has not yet been deciphered. It is unclear whether it should be considered an example of proto-writing or whether it is actual writing of the logographic-syllabic type of the other Bronze Age writing systems. Mortimer Wheeler recognises the style of writing as boustrophedon, where "this stability suggests a precarious maturity."