Everything that follows is quoted from the excellent Christianity Today Weblog:
Evidence that bolsters a doubted biblical tale
An archaeological find in Jordan is making researchers —- who seem terrified of proving the Bible historically accurate —- very skittish. The New York Times reports on the ongoing controversy.
An international team of archaeologists has recorded radiocarbon dates that they say show the tribes of Edom may have indeed come together in a cohesive society as early as the 12th century B.C., certainly by the 10th. The evidence was found in the ruins of a large copper-processing center and fortress at Khirbat en-Nahas, in the lowlands of what was Edom and is now part of Jordan. * * *
The findings, Dr. Levy and Dr. Najjar added, lend credence to biblical accounts of the rivalry between Edom and the Israelites in what was then known as Judah. By extension, they said, this supported the tradition that Judah itself had by the time of David and Solomon, in the early 10th century, emerged as a kingdom with ambition and the means of fighting off the Edomites.
The discover [sic] runs counter to prevailing notions that the kingdoms of David and Solomon were little more than agricultural cooperatives.
Most criticism has come from advocates of a "low chronology" or "minimalist" school of early biblical history. They contend that in David's time Edom was a pastoral society, and Judah not much more advanced. In this view, ancient Israel did not develop into a true state until the eighth century B.C., a century and a half after David. * * *
Israel Finkelstein, an archaeologist at Tel Aviv University and a leading proponent of the low-chronology model, has said the new research does "not shed new light on the question of state formation in Edom." He argues that perhaps the copper operations were controlled by chieftains in Beersheba, to the west, and supplied material for urban centers west and north of Edom.
Right, any explanation makes sense except the Bible's.