ancient Iran The late 3rd and 2nd millennia also known as Persia

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.