Periyar Erode Venkata Ramasamy also known as Ramaswami, EVR, Thanthai Periyar, or Periyar, was a Dravidian social activist, who founded the Self-Respect Movement and Dravidar Kazhagam. Periyar was born in the Town of Erode, Tamil Nadu to a wealthy Nayakar family. At a young age, he witnessed numerous incidents of racial, caste and gender discrimination. Periyar married when he was 19, and had a daughter who lived for only 5 months. His first wife, Nagammai, died in 1933. Periyar married for a second time in July 1948. His second wife, Maniammai (also called Maniammai Ammaiyar), continued Periyar's social work after his death in 1973, but still his thoughts and ideas were being spread by Dravidar Kazhagam.

Periyar propagated the principles of rationalism, self-respect, women’s rights and eradication of caste. He opposed the exploitation and marginalization of the non-Brahmin indigenous Dravidian peoples of South India and the imposition of, what he considered, Indo-Aryan India. His work has greatly revolutionized Tamil society and has significantly removed caste-based discrimination. He is also responsible for bringing new changes to the Tamil alphabet. However, at the same time, Periyar is also held responsible for making controversial statements on the Tamil language, Dalits and Brahmins and for endorsing violence against Brahmins. The citation awarded by the UNESCO mandram (not to be confused with UNESCO ) described Periyar as "the prophet of the new age, the Socrates of South East Asia, father of social reform movement and arch enemy of ignorance, superstitions, meaningless customs and base manners".