Who were the Shudras how they came to be the fourth varna in the Indo-Aryan society

The book delves into the historical origins and social status of the Shudra Varna, exploring the complexities of caste in India. B. R. Ambedkar, a prominent social reformer, analyzes the socio-political implications of the Shudras' position within the caste system. Through a critical examination of historical texts and social structures, the work aims to shed light on the marginalization of this group and advocate for their rights and recognition in society.