The Khazars were a nomadic Turkic people that, in the late 6th-century CE, established a major commercial empire covering the southeastern section of modern European Russia, southern Ukraine, Crimea, and Kazakhstan. They created what for its duration was the most powerful polity to emerge from the break-up of the Western Turkic Khaganate. Astride a major artery of commerce between Eastern Europe and Southwestern Asia, Khazaria became one of the foremost trading empires of the early medieval world, commanding the western marches of the Silk Road and playing a key commercial role as a crossroad between China, the Middle East and Kievan Rus'. For some three centuries the Khazars dominated the vast area extending from the Volga-Don steppes to the eastern Crimea and the northern Caucasus.
Ashkenazi Jews, also known as Ashkenazic Jews or Ashkenazim, constitute a Jewish diaspora population that emerged in the Holy Roman Empire around the end of the first millennium CE. They traditionally spoke Yiddish and largely migrated towards northern and eastern Europe during the late Middle Ages due to persecution. Hebrew was primarily used as a literary and sacred language until its 20th-century revival as a common language in Israel.
Y-chromosomal Aaron is the name given to the hypothesized most recent common ancestor of the patrilineal Jewish priestly caste known as Kohanim. According to the traditional understanding of the Hebrew Bible, this ancestor was Aaron, the brother of Moses.
Jewish ethnic divisions refer to many distinctive communities within the world's Jewish population. Although considered a self-identifying ethnicity, there are distinct ethnic subdivisions among Jews, most of which are primarily the result of geographic branching from an originating Israelite population, mixing with local communities, and subsequent independent evolutions.
The Thirteenth Tribe is a 1976 book by Arthur Koestler advocating the Khazar hypothesis of Ashkenazi ancestry, the thesis that Ashkenazi Jews are not descended from the historical Israelites of antiquity, but from Khazars, a Turkic people. Koestler hypothesized that the Khazars migrated westwards into Eastern Europe in the 12th and 13th centuries when the Khazar Empire was collapsing.
Medical genetics is the branch of medicine that involves the diagnosis and management of hereditary disorders. Medical genetics differs from human genetics in that human genetics is a field of scientific research that may or may not apply to medicine, while medical genetics refers to the application of genetics to medical care. For example, research on the causes and inheritance of genetic disorders would be considered within both human genetics and medical genetics, while the diagnosis, management, and counselling people with genetic disorders would be considered part of medical genetics.
The genetic history of the Middle East is the subject of research within the fields of human population genomics, archaeogenetics and Middle Eastern studies. Researchers use Y-DNA, mtDNA, and other autosomal DNAs to identify the genetic history of ancient and modern populations of Egypt, Persia, Mesopotamia, Anatolia, Arabia, the Levant, and other areas.
Jon Entine is an American science journalist. After working as a network news writer and producer for NBC News and ABC News, Entine moved into print journalism. Entine has written seven books and is a contributing columnist to newspapers and magazines. He is the founder and executive director of the science advocacy group the Genetic Literacy Project, and a former visiting scholar at the American Enterprise Institute. He is also the founder of the consulting company ESG Mediametrics.
Shlomo Sand is an Israeli Emeritus Professor of History at Tel Aviv University.
The medical genetics of Jews have been studied to identify and prevent some rare genetic diseases that, while still rare, are more common than average among people of Jewish descent. There are several autosomal recessive genetic disorders that are more common than average in ethnically Jewish populations, particularly Ashkenazi Jews, because of relatively recent population bottlenecks and because of consanguineous marriage. These two phenomena reduce genetic diversity and raise the chance that two parents will carry a mutation in the same gene and pass on both mutations to a child.
Genetic studies of Jews are part of the population genetics discipline and are used to analyze the ancestry of Jewish populations, complementing research in other fields such as history, linguistics, archaeology, and paleontology. These studies investigate the origins of various Jewish ethnic divisions. In particular, they examine whether there is a common genetic heritage among them. The medical genetics of Jews are studied for population-specific diseases.
The Program for Jewish Genetic Health is a centralized resource for the Jewish community, addressing all health concerns related to the medical genetics of the Jewish people. The Program's stated mission is to protect the health of the current Jewish community and its future generations. Launched in 2011, the Program for Jewish Genetic Health integrates the social mission they Montefiore Health System with the clinical services, genetic education, and biomedical advances of its medical school, the Albert Einstein College of Medicine.
Genetic studies on Arabs refers to the analyses of the genetics of ethnic Arab people in the Middle East and North Africa and parts of Sub-Sahara Africa where Black Arabs claim descent. Arabs are genetically diverse as a result of their intermarriage and mixing with indigenous people of the pre-Islamic Middle East and North Africa following the Arab and Islamic expansion. Genetic ancestry components related to the Arabian Peninsula display an increasing frequency pattern from west to east over North Africa. A similar frequency pattern exist across northeastern Africa with decreasing genetic affinities to groups of the Arabian Peninsula along the Nile river valley across Sudan and the more they go south. This genetic cline of admixture is dated to the time of Arab expansion and immigration to North Africa (Maghreb) and northeast Africa.
The Invention of the Jewish People is a study of Jewish historiography by Shlomo Sand, Professor of History at Tel Aviv University. It has generated a heated controversy. The book was on the best-seller list in Israel for nineteen weeks.
Stylianos E. Antonarakis is a Greece-born human geneticist.
The Khazar hypothesis of Ashkenazi ancestry, often called the Khazar myth by its critics, is a largely abandoned historical hypothesis that postulated that Ashkenazi Jews were primarily, or to a large extent, descended from Khazars, a multi-ethnic conglomerate of mostly Turkic peoples who formed a semi-nomadic khanate in and around the northern and central Caucasus and the Pontic–Caspian steppe. The hypothesis also postulated that after collapse of the Khazar empire, the Khazars fled to Eastern Europe and made up a large part of the Jews there. The hypothesis draws on medieval sources such as the Khazar Correspondence, according to which at some point in the 8th–9th centuries, a small number of Khazars were said by Judah Halevi and Abraham ibn Daud to have converted to Rabbinic Judaism. The scope of the conversion within the Khazar Khanate remains uncertain, but the evidence used to tie the subsequent Ashkenazi communities to the Khazars is meager and subject to conflicting interpretations.
Paul Wexler is an American-born Israeli linguist, and Professor Emeritus of linguistics at Tel Aviv University. His research fields include historical linguistics, bilingualism, Slavic linguistics, creole linguistics, Romani and Jewish languages.
Eran Elhaik is an Israeli-American geneticist and bioinformatician, an associate professor of bioinformatics at Lund University in Sweden and Chief of Science Officer at an ancestry testing company called Ancient DNA Origins owned by Enkigen Genetics Limited, registered in Ireland. His research uses computational, statistical, epidemiological and mathematical approaches to fields such as complex disorders, population genetics, personalised medicine, molecular evolution, genomics, paleogenomics and epigenetics.
Robert Williamson is a retired British-Australian molecular biologist who specialised in the mapping, gene identification, and diagnosis of human genetic disorders.
In the late 19th century, amid attempts to apply science to notions of race, some advocates of Zionism sought to reformulate conceptions of Jewishness in terms of racial identity and the "race science" of the time. They believed that this concept would allow them to build a new framework for collective Jewish identity, and thought that biology might provide "proof" for the "ethnonational myth of common descent" from the biblical land of Israel. Countering antisemitic claims that Jews were both aliens and a racially inferior people who needed to be segregated or expelled, these Zionists drew on and appropriated elements from various race theories, to argue that only a Jewish national home could enable the physical regeneration of the Jewish people and a renaissance of pride in their ancient cultural traditions.
