 This theory discards the Indo-Aryan "varna" model as the basis of caste, and is centred on the ritual power of the king, who was "supported by a group of ritual and magical specialists of low social status," with their ritual occupations being considered 'polluted'.According to Hart, it may be this model that provided the concerns with "pollution" of the members of low status groups.The Hart model for caste origin, writes Samuel, envisions "the ancient Indian society consisting of a majority without internal caste divisions and a minority consisting of a number of small occupationally polluted groups".