The Indigenous Aryans theory, also known as the Out of India Theory, proposes that the Indo-European languages, or at least the Indo-Aryan languages, originated within the Indian subcontinent, as an alternative to the established migration model which proposes the Pontic steppe as the area of origin of the Indo-European languages. The indigenist view sees the Indo-Aryan languages as having a deep history in the Indian subcontinent, and being the carriers of the Indus Valley Civilization. This view proposes an older date than is generally accepted for the Vedic period, which is generally considered to follow the decline of Harappan culture.
It includes arguments against the Indo-Aryan migration theory, and arguments to re-date the Vedas and the presence of the Vedic people in accordance with traditional, Vedic-Puranic datings. The idea of "Indigenous Aryans" also implies a migration "Out of India" to Europe and east Asia. This is contrary to the mainstream scholarly view, saying that the Indo-Aryan languages originated outside India.
The proposal has been entwined with political and religious arguments, since it is based on traditional and religious views on Indian history and its identity. There has also been resistance among some Indian scholars to the idea that Indian culture can be divided between external Indo-European and indigenous Dravidian elements, a division which is sometimes described as a legacy of colonial rule and a hindrance to Indian national unity. The debate mostly exists among the scholars of Hindu religion and the history and archaeology of India, whereas historical linguists nearly unanimously accept the migration model of Indic origins.
The standard view on the origins of the Indo-Aryans is the Indo-Aryan migration theory, which states that they entered north-western India at about 1500 BCE. An alternative view is the idea that the Aryans are indigenous to India, which challenges the standard view. In recent times the indigenous position has come to the foreground of the public debate.
The Indo-Aryan Migration theory posits a migration of Indo-European-speaking people from the Pontic Steppes into Europe, the Levant, south Asia and east Asia. It is part of the Kurgan-hypothesis/Revvised Steppe Theory. Historical linguistics provides the main basis for the theory, analysing the development and changes of languages, and establishing relations between the various Indo-European languages, and the time frame wherein these languages developed. It also provides information about shared words, and the corresponding area of the origin of Indo-European, and the specific vocabulary which is to be ascribed to specific regions. The linguistic analyses and data are supplemented with archaeological data and anthropological arguments, which together provide a coherent model that is widely accepted.