Indo-European migrations in the context of "Indo-European studies"

The history of Europe is traditionally divided into four time periods: prehistoric Europe (prior to about 800 BC), classical antiquity (800 BC to AD 500), the Middle Ages (AD 500–1500), and the modern era (since AD 1500).

The first early European modern humans appear in the fossil record about 48,000 years ago, during the Paleolithic era. Settled agriculture marked the Neolithic era, which spread slowly across Europe from southeast to the north and west. The later Neolithic period saw the introduction of early metallurgy and the use of copper-based tools and weapons, and the building of megalithic structures, as exemplified by Stonehenge. During the Indo-European migrations, Europe saw migrations from the east and southeast. The period known as classical antiquity began with the emergence of the city-states of ancient Greece. Later, the Roman Empire came to dominate the entire Mediterranean Basin. The Migration Period of the Germanic people began in the late 4th century AD.

The early Slavs were an Indo-European peoples and speakers of the Indo-European dialectswho lived during the Migration Period and the Early Middle Ages (approximately from the 5th to the 10th centuries AD) in Central, Eastern and Southeast Europe and established the foundations for the Slavic nations through the Slavic states of the Early and High Middle Ages. The Slavs' original homeland is still a matter of debate due to a lack of historical records; however, scholars generally place it in Eastern Europe, with Polesia being the most commonly accepted location.

It is generally agreed that ancient Roman writers referred to the ancestors of Slavs as Venedi. The proto-Slavic term Slav shares roots with Slavic terms for speech, word, and perhaps was used by early Slavic people themselves to denote other people, who spoke languages similar to theirs. The first written use of the name "Slavs" dates to the 6th century, when the Slavic tribes inhabited a large portion of Central and Eastern Europe. By then, the nomadic Iranian-speaking peoples living in the European Pontic Steppe (the Scythians, Sarmatians, Alans, etc.) had been absorbed by the region's Slavic-speaking population. Over the next two centuries, the Slavs expanded westwards (to the Elbe river and in the Alps), and southwards (into the Balkans, absorbing Illyrian and Thracian peoples in the process), and also moved eastwards (in the direction of the Volga River). Between the sixth and seventh centuries, large parts of Europe came to be controlled or occupied by Slavs, a process less understood and documented than that of the Germanic ethnogenesis in the west. Yet the effects of Slavicization were far more profound.

Albanian (endonym: shqip [ʃcip] , gjuha shqipe [ˈɟuha ˈʃcipɛ] , or arbërisht [aɾbəˈɾiʃt]) is an Indo-European language and the only surviving representative of the Albanoid branch, which belongs to the Paleo-Balkan group. It is the native language of the Albanian people. Standard Albanian is the official language of Albania and Kosovo, and a co-official language in North Macedonia and Montenegro, where it is the primary language of significant Albanian minority communities. Albanian is recognized as a minority language in Italy, Croatia, Romania, and Serbia. It is also spoken by long-established communities in Greece, and by the Albanian diaspora, which is generally concentrated in the Americas, Europe, and Oceania. Albanian is estimated to have as many as 7.5 million native speakers.

Albanian and other Paleo-Balkan languages had their formative core in the Balkans after the Indo-European migrations in the region. Albanian in antiquity is often thought to have been an Illyrian language for obvious geographic and historical reasons, or otherwise an unmentioned Balkan Indo-European language that was closely related to Illyrian and Messapic. The Indo-European subfamily that gave rise to Albanian is called Albanoid in reference to a specific ethnolinguistically pertinent and historically compact language group. Whether descendants or sisters of what was called 'Illyrian' by classical sources, Albanian and Messapic, on the basis of shared features and innovations, are grouped together in a common branch in the current phylogenetic classification of the Indo-European language family.

Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family. No direct record of Proto-Indo-European has been discovered; its proposed features have been derived by linguistic reconstruction from documented Indo-European languages. Far more work has gone into reconstructing PIE than any other proto-language, and it is the best understood of all proto-languages of its age. The majority of linguistic work during the 19th century was devoted to the reconstruction of PIE and its daughter languages, and many of the modern techniques of linguistic reconstruction (such as the comparative method) were developed as a result.

PIE is hypothesized to have been spoken as a single language from approximately 4500 BCE to 2500 BCE during the Late Neolithic to Early Bronze Age, though estimates vary by more than a thousand years. According to the prevailing Kurgan hypothesis, the original homeland of the Proto-Indo-Europeans may have been in the Pontic–Caspian steppe of eastern Europe. The linguistic reconstruction of PIE has provided insight into the pastoral culture and patriarchal religion of its speakers. As speakers of Proto-Indo-European became isolated from each other through the Indo-European migrations, the regional dialects of Proto-Indo-European spoken by the various groups diverged, as each dialect underwent shifts in pronunciation (the Indo-European sound laws), morphology, and vocabulary. Over many centuries, these dialects transformed into the known ancient Indo-European languages. From there, further linguistic divergence led to the evolution of their current descendants, the modern Indo-European languages.

The Paleo-European languages (sometimes also called Old European languages) are the mostly unknown languages that were spoken in Neolithic (c. 7000 – c. 1700 BC) and Bronze Age Europe (c. 3200 – c. 600 BC) prior to the spread of the Indo-European and Uralic families of languages. The vast majority of modern European populations speak Indo-European languages. However, until the Bronze Age, non-Indo-European languages were predominant across the continent. The speakers of Paleo-European languages gradually assimilated into speech communities dominated by Indo-European speakers, leading to their eventual extinction, except for Basque, which remains the only surviving descendant of a Paleo-European language.

A related term, "Pre-Indo-European", refers more generally to the diverse languages that were spoken in Eurasia before the Indo-European migrations. This category thus includes certain Paleo-European languages (apart from those that were replaced by Uralic languages), along with many others from West, Central, and South Asia.

In archaeogenetics, the term Western Steppe Herders (WSH), or Western Steppe Pastoralists, is the name given to a distinct ancestral component first identified in individuals from the Chalcolithic steppe around the start of the 5th millennium BC, subsequently detected in several genetically similar or directly related ancient populations including the Khvalynsk, Repin, Sredny Stog, and Yamnaya cultures, and found in substantial levels in contemporary populations of Europe, Central Asia, South Asia and West Asia. This ancestry is often referred to as Yamnaya ancestry, Yamnaya-related ancestry, Steppe ancestry or Steppe-related ancestry.

Western Steppe Herders are considered to be descended from a merger between Eastern Hunter-Gatherers (EHGs) and Caucasus Hunter-Gatherers (CHGs). The WSH component is modeled as an admixture of EHG and CHG ancestral components in roughly equal proportions, with the majority of the Y-DNA haplogroup contribution from EHG males. The Y-DNA haplogroups of Western Steppe Herder males are not uniform, with the Yamnaya culture individuals mainly belonging to R1b-Z2103 with a minority of I2a2, the earlier Khvalynsk culture also with mainly R1b but also some R1a, Q1a, J, and I2a2, and the later, high WSH ancestry Corded Ware culture individuals mainly belonging to haplogroup R1b in the earliest samples, with R1a-M417 becoming predominant over time.

The Yamnaya (/ˈjæmnaɪə/ YAM-ny-ə) or Yamna culture (/ˈjæmnə/ YAM-nə), also known as the Pit Grave culture or Ochre Grave culture, is a late Copper Age to early Bronze Age archaeological culture of the region between the Southern Bug, Dniester, and Ural rivers (the Pontic–Caspian steppe), dating to 3300–2600 BC. It was discovered by Vasily Gorodtsov following his archaeological excavations near the Donets River in 1901–1903. Its name derives from its characteristic burial tradition: yámnaya (я́мная) is a Russian adjective that means 'related to pits' (я́ма, yáma), as these people buried their dead in tumuli (kurgans) containing simple pit chambers. Research in recent years has found that Mykhailivka, on the lower Dnieper River, Ukraine, formed the core Yamnaya culture (c. 3600–3400 BC).

The Yamnaya culture is of particular interest to archaeologists and linguists, as the widely accepted Kurgan hypothesis posits that the people who produced the Yamnaya culture spoke a stage of the Proto-Indo-European language. The speakers of the Proto-Indo-European (PIE) language embarked on the Indo-European migrations that gave rise to the widely dispersed Indo-European languages of today.