Iran's history as a nation of people speaking an Indo-European language did not begin until the middle of the second millennium B.C. Before then, Iran was occupied by peoples with a variety of cultures. There are numerous artifacts attesting to settled agriculture, permanent sun-dried- brick dwellings, and pottery-making from the sixth millennium B.C. The most advanced area technologically was ancient Susiana, present-day Khuzestan Province (see fig. 1). By the fourth millennium, the inhabitants of Susiana, the Elamites, were using semipictographic writing, probably learned from the highly advanced civilization of Sumer in Mesopotamia (ancient name for much of the area now known as Iraq), to the west.
Sumerian influence in art, literature, and religion also became particularly strong when the Elamites were occupied by, or at least came under the domination of, two Mesopotamian cultures, those of Akkad and Ur, during the middle of the third millennium. By 2000 B.C. the Elamites had become sufficiently unified to destroy the city of Ur. Elamite civilization developed rapidly from that point, and, by the fourteenth century B.C., its art was at its most impressive.
Data as of December 1987