Re: Western tribes of Mahabharata
Gandhar could be either Kandhar of modern day afghanistan or Gandhara civilization:)
The first text of Hinduism was Manusmiriti, Maharaja Manu was King of DravidDesh, His story is similar to Noah of Ark:)
No, Vedas originated before writing was discovered while Mahabharat came much later, it is last of Hindu text after organized writing was discovered it itself mentioned that it was spoken by VedVyas and written by Bhagwan Ganesh.