 The "Purusha Sukta" verse is now generally considered to have been inserted at a later date into the "Rigveda", probably as a charter myth.Stephanie Jamison and Joel Brereton, professors of Sanskrit and Religious studies, state, "there is no evidence in the "Rigveda" for an elaborate, much-subdivided and overarching caste system", and "the "varna" system seems to be embryonic in the "Rigveda" and, both then and later, a social ideal rather than a social reality".In contrast to the lack of details about "varna" system in the "Rigveda", the "Manusmriti" includes an extensive and highly schematic commentary on the "varna" system, but it too provides "models rather than descriptions".