"But, crucially, it is proofs of a southward migration toward India and Iran that are lacking. At the start of the second millennium, a powerful and prosperous proto-urban civilization known as the “Bactria-Margiana Archaeological Complex” (BMAC; also known as the Oxus civilization) flourished in the southern oases of Central Asia. Excavations carried out over the past thirty years have revealed hundreds of sites, the most notable of which, if we ignore the older excavations at Namazga and Altyn Depe, are Gonur Depe (sometimes interpreted as a capital), Togolok, Kelleli, Taip, Djarkutan, Dashly Depe, and Sapalli Depe.51 This is a true urban civilization, with mud-brick fortifications, temples, and palaces, founded on a prosperous agricultural economy (which involved the use of irrigation) and control over networks of neighboring villages. The graves of the elite contain high-value bronze and copper objects. Indeed, the region is rich in precious mineral resources: gold, copper, lead, silver, tin, turquoise, and lapis-lazuli. Craftsmanship was highly developed, and most of the pottery is wheel-thrown. The existence of seals attests to the degree of economic complexity, as do long-distance exchanges of luxury goods. The BMAC is therefore truly part of this urban belt of semi-arid South West Asia—stretching from Mesopotamia, through Iran (with the Elam and Jiroft cultures) to the Indus civilization in the east—which prospered during the second half of the third millennium and the early second millennium BCE. The objects exchanged also attest to contacts between the inhabitants of these cities and members of the vast Andronovo steppic culture situated immediately to the north."