The document discusses the challenges to the caste system in India through various social reform movements. It notes that initially caste was associated with occupation but became hereditary over time. Several reformers aimed to end caste discrimination and the oppression of lower castes through establishing schools, advocating for inter-caste marriage and widow remarriage, and promoting social equality and justice. Key figures that led reform efforts included Jyotiba Phule, Periyar, and B.R. Ambedkar who drew from their own experiences with caste discrimination and oppression.