Caste system in Rig Veda forms the main distinguishing feature of the Hindu society. The Aryans of Central Asia and the Indo-Aryans also in the first two centuries did not follow any caste. It is only during the Rig-Vedic age that the four castes are stated. However the rigidity in the caste system as prevalent in our society or as it appears from the Code of Manu did not exist in the Vedic age.