rode Venkatappa Ramasamy (17 September 1879 – 24 December 1973), revered 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 Brahminical 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'.