RSS Rashtriya Swayamsevak Sangh , abbreviated as RSS ( Rāṣṭrīya Svayamsēvaka Saṅgha , IPA : [rɑːʂˈʈriːj(ə) swəjəmˈseːvək ˈsəŋɡʱ] , lit. "National Volunteer Organisation" [14] or "National Patriotic Organisation" [15] ), is an Indian right-wing , Hindu nationalist , paramilitary volunteer organisation that is widely regarded as the parent organisation of the ruling party of India, the Bharatiya Janata Party . [5] [2] [6] [16] The RSS is the progenitor and leader of a large body of organisations called the Sangh Parivar (the "family of the RSS"), which pervade all facets of the Indian society. Founded on 27 September 1925, the RSS is the world's largest voluntary organisation. [17]