In 1934 he joined the movement organized by Muthuramalinga Thevar to oppose the Criminal Tribes Act (CTA).
[2] In 1957, Muthuramalinga Thevar contested the Parliamentary elections as a candidate of the Forward Bloc from Aruppukottai and won.
As a result of this, he resigned the Mudukulathur Legislative Assembly seat which he had previously held.
[3] However, the victory triggered controversy which resulted in the murder of Congress leader Emmanuel Sekaran Devendrar and fuelled the 1957 Ramnad riots.
Sasivarna Thevar was also a part of the inter-caste peace conference organized by government for reconciliation between people of different castes.