Pontic-Caspian steppe in the context of "Scythian culture"

The Kurgan hypothesis (also known as the Kurgan theory, Kurgan model, or steppe theory) is the most widely accepted proposal to identify the Proto-Indo-European homeland from which the Indo-European languages spread out throughout Europe and parts of Asia. It postulates that the people of a Kurgan culture in the Pontic steppe north of the Black Sea were the most likely speakers of the Proto-Indo-European language (PIE). The term is derived from the Turkic word kurgan (курга́н), meaning tumulus or burial mound.

The steppe theory was first formulated by Otto Schrader (1883) and V. Gordon Childe (1926), then systematized in the 1950s by Marija Gimbutas, who used the term to group various prehistoric cultures, including the Yamnaya (or Pit Grave) culture and its predecessors. In the 2000s, David Anthony instead used the core Yamnaya culture and its relationship with other cultures as a point of reference.

Proto-Indo-European society is the reconstructed culture of Proto-Indo-Europeans, the ancient speakers of the Proto-Indo-European language, ancestor of all modern Indo-European languages. Historical linguistics combined with archaeological and genetic evidence have provided the current basis for understanding the culture and its people. The most widely accepted theory suggests that the culture emerged on the Pontic-Caspian steppe after 5000 BCE, a period known as the Chalcolithic where smelted copper and stone tools were in use simultaneously. Proto-Indo-European speakers are considered to have been semi-nomadic, but domestication of cattle, first for ritual sacrifice and later for consumption, dairy production, and cereal cultivation emerged as the culture shifted from herding and hunter-gatherer to farming. The social hierarchy included an upper class of priests, warriors and tribe chiefs, and a lower class of commoners and slaves; patrilineality and patriarchy characteristics have been well-established. Trade, bolstered by access to wheeled wagons, connected Proto-Indo-European culture to others with archaeological and linguistic evidence supporting relations with Proto-Uralic peoples, Uruk, and Old European cultures.