The Aryans, originating from the lands south of the Ural Mountains, migrated into India around 2000 to 1500 BC, forming a continuum within the Indo-European language family. The Aryan invasion theory, suggesting they were invaders, is contested by some scholars who argue for a mutual cultural influence with the existing Indus Valley civilization, while others maintain the invasion perspective supported by Vedic texts and language similarities. This theory remains controversial, with critics viewing it as a construct of 19th-century European scholars to assert cultural superiority.