The _____ was a teacher in India who did not believe in the Hindu gods or the caste system.

The person you are referring to is likely Dr. B. R. Ambedkar. He was a prominent social reformer, jurist, and economist who campaigned against the caste system and worked towards the upliftment of Dalits (formerly known as "Untouchables") in India. However, it is important to note that Ambedkar did believe in religious freedom and advocated for the rights of individuals to choose their own religious beliefs.