Erode Venkatappa Ramasamy, revered by his followers as Periyar or Thanthai Periyar, was an Indian social activist and politician who started the Self-Respect Movement and Dravidar Kazhagam. He is known as the 'Father of the Dravidian movement'. He rebelled against Brahmin dominance and gender and caste inequality in Tamil Nadu. Since 2021, the Indian state of Tamil Nadu celebrates his birth anniversary as 'Social Justice Day'.
B. R. Ambedkar with Ramasamy when they met in connection with a Buddhist conference in Rangoon, Myanmar in 1954.