The Vedic period is characterized by Indo-Aryan culture associated with the texts of Vedas, sacred to Hindus, which were orally composed in Vedic Sanskrit. The Vedas are some of the oldest extant texts, next to those of Egypt and Mesopotamia. The Vedic period lasted from about 1500 BCE to 500 BCE, laid the foundations of Hinduism and other cultural aspects of early Indian society. The Aryas established Vedic civilization all over North India, and increasingly so in the Gangetic Plain.
This period was a result of immigrations of Indo-Aryan speaking tribes who called themselves Arya (ārya, Aryans). They overlaid the existing civilizations of local people whom they called Dasyus. The origin of Aryans are disputed, one stream of thought insists on their origin in Central Asia whereas another stream of thought says that they were already living in India since the times before Indus Valley civilisation as evidenced by some of the writings in Rig Veda. The Out of India theory even claims that Aryans emigrated from India to settle all of Central Asia and Europe. The late 19th century “Aryan Invasion theory” has long been substituted by scholars with a more nuanced theory of migrations, various scenarios of which are being presently researched.
