Rashtriya Swayamsevak Sangh (RSS) is an Indian right-wing, Hindu nationalist organisation that is widely regarded as the parent organisation of the ruling party of India, the Bharatiya Janata Party. The RSS is one of the principal organizations of the Sangh Parivar group. Founded on Vijaya Dashami day in 1925, it claimed a commitment to selfless service to India. The organisation is the world's largest voluntary organization.