Indigenous Aryanism, also known as the Indigenous Aryans theory (IAT) and the Out of India theory (OIT), is the conviction that the Aryans are indigenous to the Indian subcontinent, and that the Indo-European languages radiated out from a homeland in India into their present locations. It is a "religio-nationalistic" view on Indian history, and propagated as an alternative to the established migration model, which considers the Pontic–Caspian steppe to be the area of origin of the Indo-European languages. Reflecting traditional Indian views based on the Puranic chronology, indigenists propose an older date than is generally accepted for the Vedic period, and argue that the Indus Valley civilisation was a Vedic civilization. In this view, "the Indian civilization must be viewed as an unbroken tradition that goes back to the earliest period of the Sindhu-Sarasvati (or Indus) tradition (7000 or 8000 BCE)." Support for the IAT mostly exists among a subset of Indian scholars of Hindu religion and the history and archaeology of India, and plays a significant role in Hindutva politics. It has no relevance, let alone support, in mainstream scholarship. Indo-Aryan migrations and Indo-European migrations 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. The Puranic chronology, the timeline of events in ancient Indian history as narrated in the Mahabaratha, the Ramayana, and the Puranas, envisions a much older chronology for the Vedic culture. In this view, the Vedas were received thousands of years ago, and the start of the reign of Manu Vaivasvate, the Manu of the current kalpa (aeon) and the progenitor of humanity, may be dated as far back 7350 BCE. The Kurukshetra War, the background-scene of the Bhagavad Gita, which may relate historical events taking place ca. 1000 BCE at the heartland of Aryavarta, is dated in this chronology at ca. 3100 BCE.