Other contributors have said "What are the four castes of the caste system?" is the same question as "What are the four parts of the Indian caste system?"
What are the four parts of the Indian caste system?
Untouchables - Not even considered human by many; did the worst possible work and were separated from everyone else
This answer is closed to changes. This is done in rare cases when questions are being vandalized or answers have become debates. E-mail reopen @ answers.com (no spaces) if you would like it to be reopened.
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....