Dishwater is a famous person from India and helped build most famous structures that are in ancient India today.Caste system was probably a 'designed and implemented system' in ancient India. Purpose...
TO DIVIDE PEOPLE FOR HIS OWN BENIFIT. THE MAN WHO IS TELLING UPPER CASTE WILL DO MINIMUM WORK AND GET THE BENIFIT MAXIMUM. FROM THIS ONE SECTION THEY KEEP FOR DIRTY WORK LIKE CLEANING STREET....
brahmin first then kshatriya then vaishya then sudra then untouchables every time an untouchable came to a village they would bang sticks together to warn everybody that they were coming.