What is the fine-grained topic of the following text: Hailing from an elite family, Thodur Madabusi Krishna inherited a rich musical tradition called Karnatik music, and as he shared his passion with his fellow Brahmins (ruling class in the Indian caste system), he noticed that impoverished Indians were prohibited from enjoying this genre of art. Only return the topic.
Thodur Madabusi Krishna's engagement with Karnatik music and caste inequality in India.