A Critical Review of Hindu Caste Systems in relation to Vemana's verses. Vemana was a great Yogi and Social reformer who lived in 14th and 15th Centuries A.D in Southern India. Yogi Vemana's verses in Telugu language were famous around the globe for their simplicity, straight forwardness, and clarity. Yogi Vemana preached equanimity among all castes, religions, and societies etc. Being a Yogi and humanist, he gave importance to all castes and to their professions without any bias. It is a must read book for everyone who wants to know about Caste or Varna systems of India.