Proto-Indo-European Urheimat hypotheses
Encyclopedia
The Proto-Indo-European Urheimat
Urheimat
Urheimat is a linguistic term denoting the original homeland of the speakers of a proto-language...

 hypotheses
are designed to explain the origins of the Proto-Indo-European language
Proto-Indo-European language
The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

 and the people. The identity of the Proto-Indo-Europeans
Proto-Indo-Europeans
The Proto-Indo-Europeans were the speakers of the Proto-Indo-European language , a reconstructed prehistoric language of Eurasia.Knowledge of them comes chiefly from the linguistic reconstruction, along with material evidence from archaeology and archaeogenetics...

 has been a recurring topic in Indo-European studies
Indo-European studies
Indo-European studies is a field of linguistics dealing with Indo-European languages, both current and extinct. Its goal is to amass information about the hypothetical proto-language from which all of these languages are descended, a language dubbed Proto-Indo-European , and its speakers, the...

 since the 19th century. Many hypotheses for an Urheimat have been proposed, but none of them has gained general acceptance among the linguistic community. There is no single archaeological pattern that might correspond to a migration on an appropriate geographic scale throughout Europe, and all these explanations raise fundamental questions about the development, spread, and adoption of languages, the relationship of language to ethnic groups, and the correspondence of archaeologically recognizable patterns of material culture to either language or ethnicity. As once put it: "One does not ask 'where is the Indo-European homeland?' but rather 'where do they put it now?'"

The only thing known for certain is that the language must have been differentiated into unconnected daughter dialects by the late 3rd millennium BC. Mainstream estimates of the time between PIE and the earliest attested texts (ca. 19th century BC; see Kültepe
Kültepe
Kültepe is a modern village near the ancient city of Kaneš or Kanesh , located in the Kayseri Province of Turkey's Central Anatolia Region...

 texts) range around 1,500 to 2,500 years, with extreme proposals diverging up to another 100% on either side:
  • the 4th millennium BC (excluding the Anatolian branch) in Armenia
    Armenia
    Armenia , officially the Republic of Armenia , is a landlocked mountainous country in the Caucasus region of Eurasia...

    , according to the Armenian hypothesis
    Armenian hypothesis
    The Armenian hypothesis of the Proto-Indo-European Urheimat, based on the Glottalic theory suggests that the Proto-Indo-European language was spoken during the 4th millennium BC in the Armenian Highland or Aryan Highland. It is an Indo-Hittite model and does not include the Anatolian languages in...

     (proposed in the context of Glottalic theory
    Glottalic theory
    The glottalic theory holds that Proto-Indo-European had ejective stops, , but not the murmured ones, , of traditional Proto-Indo-European phonological reconstructions....

    );
  • the 4th or 5th millennium BC to the east of the Caspian Sea
    Caspian Sea
    The Caspian Sea is the largest enclosed body of water on Earth by area, variously classed as the world's largest lake or a full-fledged sea. The sea has a surface area of and a volume of...

    , in the area of ancient Bactria
    Bactria
    Bactria and also appears in the Zend Avesta as Bukhdi. It is the ancient name of a historical region located between south of the Amu Darya and west of the Indus River...

    -Sogdiana
    Sogdiana
    Sogdiana or Sogdia was the ancient civilization of an Iranian people and a province of the Achaemenid Empire, eighteenth in the list on the Behistun Inscription of Darius the Great . Sogdiana is "listed" as the second of the "good lands and countries" that Ahura Mazda created...

    , according to Johanna Nichols
    Johanna Nichols
    Linguist Johanna Nichols is a professor emerita on active duty in the Department of Slavic Languages and Literatures at the University of California, Berkeley. Her research interests include the Slavic languages, the linguistic prehistory of northern Eurasia, language typology, ancient linguistic...

    ' Sogdiana hypothesis;
  • the 5th millennium BC (4th excluding the Anatolian branch) in the Pontic-Caspian steppe
    Pontic-Caspian steppe
    The Pontic-Caspian steppe is the vast steppeland stretching from the north of the Black Sea as far as the east of the Caspian Sea, from western Ukraine across the Southern Federal District and the Volga Federal District of Russia to western Kazakhstan,...

    , according to the Kurgan hypothesis
    Kurgan hypothesis
    The Kurgan hypothesis is one of the proposals about early Indo-European origins, which postulates that the people of an archaeological "Kurgan culture" in the Pontic steppe were the most likely speakers of the Proto-Indo-European language...

    ;
  • the 6th millennium BC or later in Northern Europe according to Lothar Kilian's and, especially, Marek Zvelebil's models of a broader homeland;
  • the 6th millennium BC in India
    Indian subcontinent
    The Indian subcontinent, also Indian Subcontinent, Indo-Pak Subcontinent or South Asian Subcontinent is a region of the Asian continent on the Indian tectonic plate from the Hindu Kush or Hindu Koh, Himalayas and including the Kuen Lun and Karakoram ranges, forming a land mass which extends...

    , according to Koenraad Elst
    Koenraad Elst
    Koenraad Elst is a Belgian writer and orientalist .He was an editor of the New Right Flemish nationalist journal Teksten, Kommentaren en Studies from 1992 to 1995, focusing on criticism of Islam, various other conservative and Flemish separatist publications such as Nucleus, t Pallieterke,...

    's Out of India model
    Out of India theory
    The Out of India theory is the proposition that the Indo-European language family originated in the Indian subcontinent and spread to the remainder of the Indo-European region through a series of migrations...

  • the 7th millennium BC in Anatolia
    Anatolia
    Anatolia is a geographic and historical term denoting the westernmost protrusion of Asia, comprising the majority of the Republic of Turkey...

     (the 5th, in the Balkans
    Balkans
    The Balkans is a geopolitical and cultural region of southeastern Europe...

    , excluding the Anatolian branch), according to Colin Renfrew's Anatolian hypothesis
    Anatolian hypothesis
    The Anatolian hypothesis is also called Renfrew's Neolithic Discontinuity Theory ; it proposes that the dispersal of Proto-Indo-Europeans originated in Neolithic Anatolia...

    ;
  • the 7th millennium BC in Anatolia
    Anatolia
    Anatolia is a geographic and historical term denoting the westernmost protrusion of Asia, comprising the majority of the Republic of Turkey...

     (6th excluding the Anatolian branch), according to a 2003 Bayesian analysis study;
  • before the 10th millennium BC
    Upper Paleolithic
    The Upper Paleolithic is the third and last subdivision of the Paleolithic or Old Stone Age as it is understood in Europe, Africa and Asia. Very broadly it dates to between 40,000 and 10,000 years ago, roughly coinciding with the appearance of behavioral modernity and before the advent of...

    , in the Paleolithic Continuity Theory
    Paleolithic Continuity Theory
    The Paleolithic Continuity Theory , since 2010 relabelled as the Paleolithic Continuity Paradigm , is a hypothesis suggesting that the Proto-Indo-European language can be traced back to the Upper Paleolithic, several millennia earlier than the Chalcolithic or at the most Neolithic estimates in other...

    .
  • 20,000 B.C-10,800 in the Mesolithic
    Mesolithic
    The Mesolithic is an archaeological concept used to refer to certain groups of archaeological cultures defined as falling between the Paleolithic and the Neolithic....



These possibilities boil down to four competing basic models (with variations) that have academic credibility , i.e.:
  1. Pontic-Caspian
    Kurgan hypothesis
    The Kurgan hypothesis is one of the proposals about early Indo-European origins, which postulates that the people of an archaeological "Kurgan culture" in the Pontic steppe were the most likely speakers of the Proto-Indo-European language...

    : Chalcolithic
    Copper Age
    The Chalcolithic |stone]]") period or Copper Age, also known as the Eneolithic/Æneolithic , is a phase of the Bronze Age in which the addition of tin to copper to form bronze during smelting remained yet unknown by the metallurgists of the times...

     (5th to 4th millennia BC)
  2. Anatolia
    Anatolian hypothesis
    The Anatolian hypothesis is also called Renfrew's Neolithic Discontinuity Theory ; it proposes that the dispersal of Proto-Indo-Europeans originated in Neolithic Anatolia...

    : Early Neolithic
    Neolithic
    The Neolithic Age, Era, or Period, or New Stone Age, was a period in the development of human technology, beginning about 9500 BC in some parts of the Middle East, and later in other parts of the world. It is traditionally considered as the last part of the Stone Age...

     (7th to 5th millennia BC)
  3. Baltic hypothesis: Mesolithic
    Mesolithic
    The Mesolithic is an archaeological concept used to refer to certain groups of archaeological cultures defined as falling between the Paleolithic and the Neolithic....

     to Neolithic (Ertebølle
    Ertebølle culture
    The Ertebølle culture is the name of a hunter-gatherer and fisher, pottery-making culture dating to the end of the Mesolithic period. The culture was concentrated in Southern Scandinavia, but genetically linked to strongly related cultures in Northern Germany and the Northern Netherlands...

     to Corded Ware horizon, 6th to 3rd millennia BC)
  4. Balkans
    Anatolian hypothesis
    The Anatolian hypothesis is also called Renfrew's Neolithic Discontinuity Theory ; it proposes that the dispersal of Proto-Indo-Europeans originated in Neolithic Anatolia...

    : Neolithic (5th millennium BC)

Archaeology

There have been many attempts to claim that particular prehistorical cultures can be identified with the PIE
Proto-Indo-European language
The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

-speaking peoples, but all have been speculative. All attempts to identify an actual people with an unattested language depend on a sound reconstruction of that language that allows identification of cultural concepts and environmental factors which may be associated with particular cultures (such as the use of metals, agriculture vs. pastoralism, geographically distinctive plants and animals, etc).

In the 1970s, a mainstream consensus had emerged among Indo-Europeanists in favour of the "Kurgan hypothesis
Kurgan hypothesis
The Kurgan hypothesis is one of the proposals about early Indo-European origins, which postulates that the people of an archaeological "Kurgan culture" in the Pontic steppe were the most likely speakers of the Proto-Indo-European language...

" placing the Indo-European homeland in the Pontic steppe of the Chalcolithic period. This was not least due to the influence of the Journal of Indo-European Studies
Journal of Indo-European Studies
The Journal of Indo-European Studies is a peer-reviewed academic journal of Indo-European studies, founded in 1973 by Roger Pearson. It publishes papers in the fields of anthropology, archaeology, mythology and philology relating to the cultural history of the Indo-European speaking peoples. The...

, edited by J. P. Mallory, that focused on the ideas of Marija Gimbutas
Marija Gimbutas
Marija Gimbutas , was a Lithuanian-American archeologist known for her research into the Neolithic and Bronze Age cultures of "Old Europe", a term she introduced. Her works published between 1946 and 1971 introduced new views by combining traditional spadework with linguistics and mythological...

, and offered some improvements. She had created a modern variation on the traditional invasion theory (the Kurgan hypothesis
Kurgan hypothesis
The Kurgan hypothesis is one of the proposals about early Indo-European origins, which postulates that the people of an archaeological "Kurgan culture" in the Pontic steppe were the most likely speakers of the Proto-Indo-European language...

, after the kurgan
Kurgan
Kurgan is the Turkic term for a tumulus; mound of earth and stones raised over a grave or graves, originating with its use in Soviet archaeology, now widely used for tumuli in the context of Eastern European and Central Asian archaeology....

s (burial mounds) of the Eurasian steppes) in which the Indo-Europeans were a nomad
Nomad
Nomadic people , commonly known as itinerants in modern-day contexts, are communities of people who move from one place to another, rather than settling permanently in one location. There are an estimated 30-40 million nomads in the world. Many cultures have traditionally been nomadic, but...

ic tribe in Eastern Ukraine
Ukraine
Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...

 and Southern Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 and expanded on horseback in several waves during the 3rd millennium BCE. Their expansion coincided with the taming of the horse
Horse
The horse is one of two extant subspecies of Equus ferus, or the wild horse. It is a single-hooved mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today...

. Leaving archaeological signs of their presence (see battle-axe people), they subjugated the peaceful European Neolithic farmers of Gimbutas's Old Europe. As Gimbutas's beliefs evolved, she put increasing emphasis on the patriarchal
Patriarchy
Patriarchy is a social system in which the role of the male as the primary authority figure is central to social organization, and where fathers hold authority over women, children, and property. It implies the institutions of male rule and privilege, and entails female subordination...

, patrilinear nature of the invading culture, sharply contrasting it with the supposedly egalitarian, if not matrilinear culture of the invaded, to a point of formulating essentially feminist archaeology.

Her interpretation of Indo-European culture found genetic support in remains from the Neolithic
Neolithic
The Neolithic Age, Era, or Period, or New Stone Age, was a period in the development of human technology, beginning about 9500 BC in some parts of the Middle East, and later in other parts of the world. It is traditionally considered as the last part of the Stone Age...

 culture of Scandinavia
Scandinavia
Scandinavia is a cultural, historical and ethno-linguistic region in northern Europe that includes the three kingdoms of Denmark, Norway and Sweden, characterized by their common ethno-cultural heritage and language. Modern Norway and Sweden proper are situated on the Scandinavian Peninsula,...

, where bone
Bone
Bones are rigid organs that constitute part of the endoskeleton of vertebrates. They support, and protect the various organs of the body, produce red and white blood cells and store minerals. Bone tissue is a type of dense connective tissue...

 remains in Neolithic graves indicated that the megalith
Megalith
A megalith is a large stone that has been used to construct a structure or monument, either alone or together with other stones. Megalithic describes structures made of such large stones, utilizing an interlocking system without the use of mortar or cement.The word 'megalith' comes from the Ancient...

 culture was either matrilocal or matrilineal, as the people buried in the same grave were related through the women. Likewise, there is a tradition of remaining matrilineal traditions among the Picts
Picts
The Picts were a group of Late Iron Age and Early Mediaeval people living in what is now eastern and northern Scotland. There is an association with the distribution of brochs, place names beginning 'Pit-', for instance Pitlochry, and Pictish stones. They are recorded from before the Roman conquest...

. A modified form of this theory by JP Mallory, dating the migrations earlier to around 4000 BCE and putting less insistence on their violent or quasi-military nature, essentially replaced the version of Gimbutas.

The Kurgan hypothesis
Kurgan hypothesis
The Kurgan hypothesis is one of the proposals about early Indo-European origins, which postulates that the people of an archaeological "Kurgan culture" in the Pontic steppe were the most likely speakers of the Proto-Indo-European language...

 seeks to explain the Indo-European language expansion by a succession of migrations from the Pontic-Caspian steppe
Pontic-Caspian steppe
The Pontic-Caspian steppe is the vast steppeland stretching from the north of the Black Sea as far as the east of the Caspian Sea, from western Ukraine across the Southern Federal District and the Volga Federal District of Russia to western Kazakhstan,...

, or, more specifically and according to the revised version, to the area encompassed by the Sredny Stog culture
Sredny Stog culture
The Sredny Stog culture dates from the 4500-3500 BC. It was situated just north of the Sea of Azov between the Dnieper and the Don...

 (ca. 4500 BC). This hypothesis is compatible with the argument that the PIE homeland must have been larger, because the "Neolithic creolisation hypothesis
Neolithic creolisation hypothesis
The Neolithic creolisation hypothesis, first put forward by Marek Zvelebil in 1995, contributes to the Proto-Indo-European Urheimat issue and proposes a cultural melting pot in the Neolithic of Northern Europe of foreign Neolithic farmers and indigenous Mesolithic hunter-gatherer communities, that...

" allows the Pontic-Caspian region to have been part of PIE territory.

The main competitor of the Kurgan hypothesis is the Anatolian hypothesis
Anatolian hypothesis
The Anatolian hypothesis is also called Renfrew's Neolithic Discontinuity Theory ; it proposes that the dispersal of Proto-Indo-Europeans originated in Neolithic Anatolia...

 advanced by Colin Renfrew. It states that the Indo-European languages began to spread peacefully into Europe from Asia Minor
Asia Minor
Asia Minor is a geographical location at the westernmost protrusion of Asia, also called Anatolia, and corresponds to the western two thirds of the Asian part of Turkey...

 from around 7000 BCE with the advance of farming
Neolithic Revolution
The Neolithic Revolution was the first agricultural revolution. It was the transition from hunting and gathering to agriculture and settlement. Archaeological data indicates that various forms of plants and animal domestication evolved independently in 6 separate locations worldwide circa...

 (wave of advance). The expansion of agriculture from the Middle East diffused three linguistic families: Indo-European toward Europe, Dravidian toward Pakistan and India, and Afro Asiatic toward Arabia and North Africa. Essentially the same hypothesis was suggested by Cavalli-Sforza. But this theory is contradicted by the fact that ancient Anatolia is known to be inhabited by non-Indo-European people, namely the Hattians
Hattians
The Hattians were an ancient people who inhabited the land of Hatti in present-day central part of Anatolia, Turkey, noted at least as early as the empire of Sargon of Akkad , until they were gradually displaced and absorbed ca...

 and Chalybes
Chalybes
The Chalybes or Chaldoi were a tribe of proto-Georgians. Classical Antiquity credited with the invention of ferrous metallurgy....

. Also, the spread of farming does not seem to have been a uniform process or to have been achieved everywhere by population migration.

Genetics

The accumulation of Archaeogenetic evidence which uses genetic analysis to trace migration patterns since the 1990s has also added new elements to the puzzle. Luigi Luca Cavalli-Sforza
Luigi Luca Cavalli-Sforza
Luigi Luca Cavalli-Sforza is an Italian population geneticist born in Genoa, who has been a professor at Stanford University since 1970 .-Books:...

 and Alberto Piazza argue that Renfrew and Gimbutas reinforce rather than contradict each other. states that "It is clear that, genetically speaking, peoples of the Kurgan steppe descended at least in part from people of the Middle Eastern Neolithic who immigrated there from Turkey." Piazza & Cavalli-Sforza (2006) state that:
if the expansions began at 9,500 years ago from Anatolia and at 6,000 years ago from the Yamnaya culture
Yamna culture
The Yamna culture is a late copper age/early Bronze Age culture of the Southern Bug/Dniester/Ural region , dating to the 36th–23rd centuries BC...

 region, then a 3,500-year period elapsed during their migration to the Volga
Volga River
The Volga is the largest river in Europe in terms of length, discharge, and watershed. It flows through central Russia, and is widely viewed as the national river of Russia. Out of the twenty largest cities of Russia, eleven, including the capital Moscow, are situated in the Volga's drainage...

-Don
Don River (Russia)
The Don River is one of the major rivers of Russia. It rises in the town of Novomoskovsk 60 kilometres southeast from Tula, southeast of Moscow, and flows for a distance of about 1,950 kilometres to the Sea of Azov....

 region from Anatolia, probably through the Balkans. There a completely new, mostly pastoral culture developed under the stimulus of an environment unfavorable to standard agriculture, but offering new attractive possibilities. Our hypothesis is, therefore, that Indo-European languages derived from a secondary expansion from the Yamnaya culture
Yamna culture
The Yamna culture is a late copper age/early Bronze Age culture of the Southern Bug/Dniester/Ural region , dating to the 36th–23rd centuries BC...

 region after the Neolithic farmers, possibly coming from Anatolia and settled there, developing pastoral nomadism.

states that "there is nothing to contradict this model, although the genetic patterns do not provide clear support either," and instead argues that the evidence is much stronger for Gimbutas' model:
while we see substantial genetic and archaeological evidence for an Indo-European migration originating in the southern Russian steppes, there is little evidence for a similarly massive Indo-European migration from the Middle East to Europe. One possibility is that, as a much earlier migration (8,000 years old, as opposed to 4,000), the genetic signals carried by Indo-European-speaking farmers may simply have dispersed over the years. There is clearly some genetic evidence for migration from the Middle East, as Cavalli-Sforza and his colleagues showed, but the signal is not strong enough for us to trace the distribution of Neolithic languages throughout the entirety of Indo-European-speaking Europe.


High concentrations of Mesolithic or late Paleolithic Y-DNA haplogroups of types R1b
Haplogroup R1b (Y-DNA)
The point of origin of R1b is thought to lie in Eurasia, most likely in Western Asia. T. Karafet et al. estimated the age of R1, the parent of R1b, as 18,500 years before present....

 (typically well above 35%) and I
Haplogroup I (Y-DNA)
In human genetics, Haplogroup I is a Y-chromosome DNA haplogroup, a subgroup of haplogroup IJ, itself a derivative of Haplogroup IJK....

 (up to 25%), are thought to derive ultimately of the robust Eurasiatic Cro Magnoid
Cro-Magnon
The Cro-Magnon were the first early modern humans of the European Upper Paleolithic. The earliest known remains of Cro-Magnon-like humans are radiometrically dated to 35,000 years before present....

 Homo sapiens of the Aurignacian
Aurignacian
The Aurignacian culture is an archaeological culture of the Upper Palaeolithic, located in Europe and southwest Asia. It lasted broadly within the period from ca. 45,000 to 35,000 years ago in terms of conventional radiocarbon dating, or between ca. 47,000 and 41,000 years ago in terms of the most...

 culture, and the subsequent gracile leptodolichomorphous people of the Gravettian
Gravettian
thumb|right|Burins to the Gravettian culture.The Gravettian toolmaking culture was a specific archaeological industry of the European Upper Palaeolithic era prevalent before the last glacial epoch. It is named after the type site of La Gravette in the Dordogne region of France where its...

 culture that entered Europe from the Middle East 20,000 to 25,000 years ago, respectively. Small Neolithic additions have been connected to occurrences of haplogroups J2
Haplogroup J2 (Y-DNA)
In human genetics, Haplogroup J2 is a Y-chromosome haplogroup which is a subdivision of haplogroup J. It is further divided into two complementary clades, J2a-M410 and J2b-M12.-Origins:...

, G
Haplogroup G (Y-DNA)
In human genetics, Haplogroup G is a Y-chromosome haplogroup. It is a branch of Haplogroup F . Haplogroup G has an overall low frequency in most populations but is widely distributed within many ethnic groups of the Old World in Europe, northern and western Asia, northern Africa, the Middle East,...

, F and E3b1a (which are believed to have originated in Anatolia, the latter haplogroup in Northeastern Africa), although such a position has been challenged as simplistic. Haplogroup R1a1, whose lineage is thought to have originated in the Eurasian Steppes north of the Black and Caspian Seas, is associated with the Kurgan culture, as well as with the postglacial Ahrensburg culture
Ahrensburg culture
The Ahrensburg culture was a late Upper Paleolithic culture during the Younger Dryas, the last spell of cold at the end of the Weichsel glaciation. The culture is named after village of Ahrensburg, northeast of Hamburg in the German state of Schleswig-Holstein where wooden arrow shafts and clubs...

 that might have spread the gene originally. On the other hand Dupuy and his colleagues proposed Ahrensburg culture to have brought Haplogroup Hg P*(xR1a) or R1b
Haplogroup R1b (Y-DNA)
The point of origin of R1b is thought to lie in Eurasia, most likely in Western Asia. T. Karafet et al. estimated the age of R1, the parent of R1b, as 18,500 years before present....

 (Y-DNA) to the population and stressed genetic similarity with Germany.
Ornella Semino et al. propose a postglacial spread of the R1a1 gene during the Late Glacial Maximum, subsequently magnified by the expansion of the Kurgan culture into Europe and eastward. R1a1 is most prevalent in Poland, Russia, and Ukraine and is also observed in Pakistan, India and central Asia. Wells suggests the origin, distribution and age of R1a1 points to an ancient migration, possibly corresponding to the spread by the Kurgan
Kurgan
Kurgan is the Turkic term for a tumulus; mound of earth and stones raised over a grave or graves, originating with its use in Soviet archaeology, now widely used for tumuli in the context of Eastern European and Central Asian archaeology....

 people in their expansion across the Eurasian steppe
Eurasian Steppe
The Eurasian Steppe is the vast steppe ecoregion of Eurasia in the Temperate grasslands, savannas, and shrublands Biome. It stretches from Hungary to Mongolia...

 around 3000 BC. R1a1 is largely confined east of the Vistula and drops considerably to the west: R1a1 measurements read 6.2% to Germans (a 4X drop to Czechs and Slovakians reading 26,7%) and 3.7% to Dutch. The spread of Y-chromosome DNA haplogroup R1a1 has also been associated with the spread of the Indo-European languages, as well as a later, more regional spread associated with the Slavic expansions. The mutations that characterize haplogroup R1a occurred ~10,000 years bp. Its defining mutation (M17) occurred about 10,000 to 14,000 years ago.

Out of 10 human male remains assigned to the Andronovo horizon from the Krasnoyarsk region, 9 possessed the R1a
Haplogroup R1a (Y-DNA)
Haplogroup R1a is the phylogenetic name of a major clade of Human Y-chromosome DNA haplogroups. In other words, it is a way of grouping a significant part of all modern men according to a shared male-line ancestor. It is common in many parts of Eurasia and is frequently discussed in human...

 Y-chromosome haplogroup
Haplogroup
In the study of molecular evolution, a haplogroup is a group of similar haplotypes that share a common ancestor having the same single nucleotide polymorphism mutation in both haplotypes. Because a haplogroup consists of similar haplotypes, this is what makes it possible to predict a haplogroup...

 and one C
Haplogroup C (Y-DNA)
In human genetics, Haplogroup C is a Y-chromosome haplogroup, defined by UEPs M130/RPS4Y711, M216, P184, P255, and P260, which are all SNP mutations. It is a sibling clade of Haplogroup F, within the more ancient grouping of Haplogroup CF...

 haplogroup (xC3). mtDNA haplogroups of nine individuals assigned to the same Andronovo horizon and region were as follows: U4 (2 individuals), U2e, U5a1, Z, T1, T4, H, and K2b.

90% of the Bronze Age period mtDNA haplogroups were of west Eurasian origin and the study determined that at least 60% of the individuals overall (out of the 26 Bronze and Iron Age human remains' samples of the study that could be tested) had light hair and blue or green eyes.

A 2004 study also established that during the Bronze Age/Iron Age period, the majority of the population of Kazakhstan
Kazakhstan
Kazakhstan , officially the Republic of Kazakhstan, is a transcontinental country in Central Asia and Eastern Europe. Ranked as the ninth largest country in the world, it is also the world's largest landlocked country; its territory of is greater than Western Europe...

 (part of the Andronovo culture during Bronze Age), was of west Eurasian origin (with mtDNA haplogroups such as U, H, HV, T, I and W), and that prior to the 13th-7th century BCE, all Kazakh samples belonged to European lineages.

Other hypotheses

Using stochastic models
Stochastic process
In probability theory, a stochastic process , or sometimes random process, is the counterpart to a deterministic process...

 to evaluate the presence/absence of different words across Indo-European, yielded that the origin of Indo-European goes back about 8500 years, the first split being that of Hittite
Hittite language
Hittite is the extinct language once spoken by the Hittites, a people who created an empire centred on Hattusa in north-central Anatolia...

 from the rest (Indo-Hittite
Indo-Hittite
In Indo-European linguistics, the term Indo-Hittite refers to Sturtevant's 1926 hypothesis that the Anatolian languages may have split off the Proto-Indo-European language considerably earlier than the separation of the remaining Indo-European languages...

 hypothesis). However, the procedure to infer from the lifespan of some words upon the lifespan of a language remains at least questionable. Moreover, the idiosyncratic outcome of e.g. the Albanian language must raise severe doubts about both the method and the data.
Besides, there are a lot of lexicostatistical (and some glottochronological) attempts before and after G&A with quite other results

A scenario that could reconcile Renfrew's beliefs with the Kurgan hypothesis is that Indo-European migrations are somehow related to the submersion of the northeastern part of the Black Sea
Black Sea deluge theory
The Black Sea deluge is a hypothesized catastrophic rise in the level of the Black Sea circa 5600 BC due to waters from the Mediterranean Sea breaching a sill in the Bosporus Strait. The hypothesis made headlines when The New York Times published it in December 1996, shortly before it was published...

 around 5600 BC: while a splinter group who became the proto-
Proto-language
A proto-language in the tree model of historical linguistics is the common ancestor of the languages that form a language family. Occasionally, the German term Ursprache is used instead.Often the proto-language is not known directly...

Hittite speakers moved into northeastern Anatolia around 7000 BC, the remaining population went north, evolving into the Kurgan culture, while others may have escaped far to the northeast (Tocharian
Tocharian
Tocharian may refer to:* Tocharians, an ancient people who inhabited the Tarim Basin in Central Asia* Tocharian languages, two Indo-European languages spoken by those people...

s) and the southeast (Indo-Iranians
Indo-Iranians
Indo-Iranian peoples are a linguistic group consisting of the Indo-Aryan, Iranian, Dardic and Nuristani peoples; that is, speakers of Indo-Iranian languages, a major branch of the Indo-European language family....

). While the time-frame of this scenario is consistent with Renfrew, it is incompatible with his core assumption that Indo-European spread with the advance of agriculture.

See also

  • Old European culture
  • Armenian hypothesis
    Armenian hypothesis
    The Armenian hypothesis of the Proto-Indo-European Urheimat, based on the Glottalic theory suggests that the Proto-Indo-European language was spoken during the 4th millennium BC in the Armenian Highland or Aryan Highland. It is an Indo-Hittite model and does not include the Anatolian languages in...

  • Anatolian hypothesis
    Anatolian hypothesis
    The Anatolian hypothesis is also called Renfrew's Neolithic Discontinuity Theory ; it proposes that the dispersal of Proto-Indo-Europeans originated in Neolithic Anatolia...

  • Neolithic Europe
    Neolithic Europe
    Neolithic Europe refers to a prehistoric period in which Neolithic technology was present in Europe. This corresponds roughly to a time between 7000 BC and c. 1700 BC...

  • Bronze Age Europe
    Bronze Age Europe
    The European Bronze Age is characterized by bronze artifacts and the use of bronze implements. The regional Bronze Age succeeds the Neolithic, it starts with the Aegean Bronze Age 3200 BC...

  • Proto-Indo-Europeans
    Proto-Indo-Europeans
    The Proto-Indo-Europeans were the speakers of the Proto-Indo-European language , a reconstructed prehistoric language of Eurasia.Knowledge of them comes chiefly from the linguistic reconstruction, along with material evidence from archaeology and archaeogenetics...

  • Proto-Indo-European language
    Proto-Indo-European language
    The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

  • Indo-European studies
    Indo-European studies
    Indo-European studies is a field of linguistics dealing with Indo-European languages, both current and extinct. Its goal is to amass information about the hypothetical proto-language from which all of these languages are descended, a language dubbed Proto-Indo-European , and its speakers, the...



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