The Sumerian King List or Chronicle of the One Monarchy is an ancient literary composition written in Sumerian that was likely created and redacted to legitimize the claims to power of various city-states and kingdoms in southern Mesopotamia during the late third and early second millennium BC. It does so by repetitively listing Sumerian cities, the kings that ruled there, and the lengths of their reigns. Especially in the early part of the list, these reigns often span thousands of years. In the oldest known version, dated to the Ur III period but probably based on Akkadian source material, the SKL reflected a more linear transition of power from Kish, the first city to receive kingship, to Akkad. In later versions from the Old Babylonian period, the list consisted of a large number of cities between which kingship was transferred, reflecting a more cyclical view of how kingship came to a city, only to be inevitably replaced by the next. In its best-known and best-preserved version, as recorded on the Weld-Blundell Prism, the SKL begins with a number of antediluvian kings, who ruled before a flood swept over the land, after which kingship went to Kish. It ends with a dynasty from Isin, which is well-known from other contemporary sources.

Sumer is the earliest known civilization, located in the historical region of southern Mesopotamia, emerging during the Chalcolithic and early Bronze Ages between the sixth and fifth millennium BC. Like nearby Elam, it is one of the cradles of civilization, along with Egypt, the Indus Valley, the Erligang culture of the Yellow River valley, Caral-Supe, and Mesoamerica. Living along the valleys of the Tigris and Euphrates rivers, Sumerian farmers grew an abundance of grain and other crops, a surplus which enabled them to form urban settlements. The world's earliest known texts come from the Sumerian cities of Uruk and Jemdet Nasr, and date to between c. 3350 – c. 2500 BC, following a period of proto-writing c. 4000 – c. 2500 BC.