Dr. Ambedkar’s thoughts as reflected in his writings and speeches have significant importance in tracing the history and growth of social thought in India. In the course of time so many of his publications are not even available in the market. In some cases the authentic editions are getting out of print. Besides, as time passes, many of his observations in matters social, economic and political are coming true. Social tensions and caste conflicts are continuously on the increase. Dr. Ambedkar’s thoughts have therefore, assumed more relevance today. If his solutions and remedies on various socioeconomic problems are understood and followed, it may help us to steer through the present turmoil and guide us for the future. It was therefore very apt on the part of the Government of Maharashtra to have appointed an Advisory Committee to compile all the material available on Dr. Ambedkar for publishing the same in a suitable form. All efforts are therefore being made to collect what the learned Doctor wrote and spoke. In the present volume, besides Castes in India. Annihilation of Caste, his address on Justice Ranade. Federation versus Freedom and other publications, some of his articles not easily available such as Small Holdings in India, Review on Russell’s book etc. ; have also been included