“The author uses his observations to refute theories that Ashkenazi Jews are descendants of converted Khazars, a semi-nomadic people living in medieval Eurasia who welcomed Jews to their midst. He also reports that in addition to southern Europeans, the closest genetic neighbors to most Jewish groups were the Palestinians, Israeli Beduin and Druse. “The genetic clusters formed by each of these non-Jewish Middle Eastern groups reflects their own histories of marrying within the group,” he said.”