he Bhagavad Gita is about dharma. It speaks not only of universal moral duties like justice and sacrifice, but also swadharma, often understood as an individual’s caste duties. The caste references in the Gita, pointed out amongst others by B. R. Ambedkar, made modern Indian nationalists rather uneasy.
Source: Bhagavad Gita wasn’t always India’s defining book. Another text was far more popular globally