P. Balakrishna was a Dalit activist during 1930s & 40s. Harijanabhyudayam is a brief history of social reform movement and Dalit movement in Andhra during since late nineteenth century to 1947
Perumalla Dasu was a Dalit activist and his Deenalapamu was a long poem criticizing the dominant politics of 1930s including Harijana Sevak Sangh of Gandhi