Rather less is known of the cultures in this time range in Iran than of contemporary cultures elsewhere in the ancient Middle East. Research has tended to concentrate on the Neolithic and protohistoric periods, and the scattered evidence for important cultural and artistic developments in the Chalcolithic Period (Copper Age) and Early Bronze Age resists coherent summary. It is clear that trends that began in the late Neolithic Period continued in the millennia that followed and that the rugged, broken landscape of the Iranian plateau forced people into a variety of relatively isolated cultures. In no instance, with the important exception of Elam (see The Elamites, below), did Iran participate in the developments that led to fully urban civilization in lowland Mesopotamia to the west or in the Indus valley to the east. Throughout prehistory the Iranian plateau remained at the economic and cultural level of village life achieved in the Neolithic Period. The separate cultural areas on the plateau are as yet barely understood by the modern archaeologist in any terms other than through the painted pottery assemblages found at several sites throughout Iran. Though they developed in comparative isolation, each of these areas does yield some evidence of cultural contact with its immediate neighbours and, in some striking cases, with developments in the centres of higher civilization in Mesopotamia. Trade would appear to be the principal mechanism by which such contacts were maintained, and often Elam appears to have acted as an intermediary between Sumer and Babylon on the one hand and the plateau cultures on the other. Trade across the northern part of the plateau, through the sites of Tepe Hissar and Sialk, most probably involved transshipping semiprecious stones such as lapis lazuli from Afghanistan to Mesopotamia. The appearance of proto-Elamite tablets in Sialk IV may bear witness to such trade. So also may the appearance of similar proto-Elamite tablets at Tepe Yahya south of Kermān and in the great central desert provide evidence of trade connections between Mesopotamia and the east—in this case a trade that may have centred on specific items such as steatite and copper. Parsa perhaps also participated in such trade networks, as is suggested by the appearance there, alongside strictly local ceramics, of wares that have clear Mesopotamian affinities. In the west-central Zagros, outside influences from both the north and the west can be traced in the ceramic record; such is also the case for local cultures in Azerbaijan to the northwest. In general, however, these millennia represent a major dark age in Iranian prehistory and warrant considerably more attention than they have received. The late 3rd and 2nd millennia
The beginning of this period is generally characterized by an even more marked isolation of the plateau than earlier, while the latter half of the period is one of major new disruptions, heretofore unique in Iranian history, that laid the groundwork for developments in the protohistoric period. In northwestern and central western Iran, local cultures, as yet barely defined beyond their ceramic parameters, developed in relative isolation from events elsewhere. All occupation had ceased at Tepe Sialk, but the painted pottery cultures characteristic of earlier Hissar and of the sites in the Gorgān lowland in the northeast continued. Little Mesopotamian influence is evident, though some contacts between Elam and the plateau remained. Beginning perhaps as early as 2400 bc but more probably somewhat later, a radical transformation occurred in the culture of the northeast: earlier painted potteries were entirely replaced by a distinctive gray or gray-black ceramic associated with a variety of other artifacts, primarily weapons and ornaments in copper or bronze, which were also unique. Whether this cultural change represents a strictly local development or testifies to an important intrusion of new peoples into the area is still under debate. In any case, none of these developments can be traced to Mesopotamia or to other areas to the west, regions which had previously been the sources of outside influences on the Iranian plateau. Somewhat later the local cultures of central and northwestern Iran were apparently influenced by developments in northern Mesopotamia and Assyria, along patterns of contact that had been well established in earlier periods. Yet this contact, as it is observed at Godin III, Hasanlu VI, and Dinkha Tepe, did not cause any major dislocation of local cultural patterns. In the second half of the 2nd millennium, however, western Iran—at first perhaps gradually and then with striking suddenness—came under the influence of the gray and gray-black ware cultures that had developed earlier in the northeast. There the impact of these influences was such as to definitely suggest a major cultural dislocation and the introduction of a whole new culture—and probably a new people—into the Zagros. It was this development that marked the end of the Bronze Age in western Iran and ushered in the early protohistoric period. The Elamites
Whereas the Iranian plateau did not experience the rise of urban, literate civilization in the late 4th and early 3rd millennia on the Mesopotamian pattern, lowland Khūzestān did. There Elamite civilization was centred. Geographically, Elam included more than Khūzestān; it was a combination of the lowlands and the immediate highland areas to the north and east. Elamite strength was based on an ability to hold these various areas together under a coordinated government that permitted the maximum interchange of the natural resources unique to each region. Traditionally this was done through a federated governmental structure.
Closely related to that form of government was the Elamite system of inheritance and power distribution. The normal pattern of government was that of an overlord ruling over vassal princes. In earliest times the overlord lived in Susa, which functioned as a federal capital. With him ruled his brother closest in age, the viceroy, who usually had his seat of government in the native city of the currently ruling dynasty. This viceroy was heir presumptive to the overlord. Yet a third official, the regent or prince of Susa (the district), shared power with the overlord and the viceroy. He was usually the overlord’s son or, if no son was available, his nephew. On the death of the overlord, the viceroy became overlord. The prince of Susa remained in office, and the brother of the old viceroy nearest to him in age became the new viceroy. Only if all brothers were dead was the prince of Susa promoted to viceroy, thus enabling the overlord to name his own son (or nephew) as the new prince of Susa. Such a complicated system of governmental checks, balances, and power inheritance often broke down, despite bilateral descent and levirate marriage (the compulsory marriage of a widow to her deceased husband’s brother). What is remarkable is how often the system did work; it was only in the Middle and Neo-Elamite periods that sons more often succeeded fathers to power.
Elamite history can be divided into three main phases: the Old, Middle, and Late, or Neo-Elamite, periods. In all periods Elam was closely involved with Sumer, Babylonia, and Assyria, sometimes through peaceful trade but more often through war. In like manner, Elam was often a participant in events on the Iranian plateau. Both involvements were related to the combined need of all the lowland civilizations to control the warlike peoples to the east and to exploit the economic resources of the plateau. The Old Elamite period
The earliest kings in the Old Elamite period may date to approximately 2700 bc. Already conflict with Mesopotamia, in this case apparently with the city of Ur, was characteristic of Elamite history. These early rulers were succeeded by the Awan (Shūstar) dynasty. The 11th king of this line entered into treaty relations with the great Naram-Sin of Akkad (reigned c. 254–c. 2218 bc). Yet a new ruling house soon appeared, the Simash dynasty (Simash may have been in the mountains of southern Lorestān). The outstanding event of this period was the virtual conquest of Elam by Shulgi of the 3rd dynasty of Ur (c. 2094–c. 2047 bc). Eventually the Elamites rose in rebellion and overthrew the 3rd Ur dynasty, an event long remembered in Mesopotamian dirges and omen texts. About the mid 19th century bc, power in Elam passed to a new dynasty, that of Eparti. The third king of this line, Shirukdukh, was active in various military coalitions against the rising power of Babylon, but Hammurabi was not to be denied, and Elam was crushed in 1764 bc. The Old Babylon kingdom, however, fell into rapid decline following the death of Hammurabi, and it was not long before the Elamites were able to gain revenge. Kutir-Nahhunte I attacked Samsuiluna (c. 1749–c. 1712 bc), Hammurabi’s son, and dealt so serious a defeat to the Babylonians that the event was remembered more than 1,000 years later in an inscription of the Assyrian king Ashurbanipal. It may be assumed that with this stroke Elam once again gained independence. The end of the Eparti dynasty, which occurred possibly in the late 16th century bc, is buried in silence. The Middle Elamite period