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.
Chimú culture
The oldest civilization present on the north coast of Peru is the Moche or Mochica civilization, which is identified as Early Chimú. The start of this period is not known for certain, but it ended around 700 AD. It was centered in the Chicama, Moche, and Viru Valleys. "Many large pyramids are attributed to the Early Chimú period." (37) These pyramids are built of adobe in rectangular shapes made from molds. "Early Chimú cemeteries are also found without pyramid associations. Burials are usually in extended positions, in prepared tombs. The rectangular, adobe-lined and covered tombs have niches in their walls in which bowls were placed." (39)