Backward classes are present in our country..they are named as SC,ST's..(Scheduled caste and Scheduled Tribe)..
Before independence they were not given any such rights for the upwardness of backwardness of indian people..
After realizing the need for their freedom from the landlords and also from Indian society ,they thought of asserting their freedom and hence they were
1)the rise of an educated and articulate group among them,
2)the expansion of mass media
3)and most importantly the impact of ideas and life of Dr. B.R. Ambedkar on them.
he fought for the rights for the sake of dalits and also backward casts..