Professor James Kugel of Bar Ilan University wrote that over the last 100 years, scholarship has performed something of a zigzag about the historicity of Abraham. In the late 19th century, scholars were often skeptical of the Biblical account and believed that someone (the Jahwist or Elohist) who lived long after the Israelites had settled Canaan made up the Abrahamic stories to justify that settlement, to claim that although Israel's ancestor had arrived from a distant region, God had granted the land to Abraham. Then, early in the 20th century, archaeologists began turning up evidence that seemed to confirm, or at least coincide with, elements of the Genesis narrative, including evidence of Abraham's hometown, Ur; legal practices, customs, and a way of life that suited the Abrahamic narratives; the names of cities like Haran, Nahur, Terah, Peleg, and Serug mentioned in Genesis; the movement of people throughout the area in the late 18th century BCE; and documentation of adoptions of mature adults and wives like Eliezer and Sarah. In more recent times, however, this approach has come to be questioned, as scholars found that many of the stories contain elements (like the Philistines) from long after the time of Abraham; significant differences appear between the ancient texts and the Biblical passages they supposedly explained; and the absence of any reference to Abraham in the writings of Israel's 8th- and 7th-century prophets, who otherwise refer to Sodom and Gomorrah, Jacob and Esau, and the Exodus and Israel's desert wanderings, but do not mention Abraham until the 6th century or later. Professor Seters] of the University of North Carolina argued that the Bible says that Abraham migrated from Babylon to Canaan to reflect the Jews' own "migration" from Babylon after having been exiled there in the 6th century. Kugel concluded that most scholars now concede that the Abrahamic stories contain some very ancient material arguably going back to the 10th or 11th century BCE, transmitted orally, and then transformed into the present, prose formulations at a time that remains the subject of debate.