The Sangh Parivar are a family of Hindu Nationalist organisations (including religious, student, political and paramilitary organisations) with similar ideological goals and often overlapping membership. The parliamentary political wing of the Sangh Parivar is the BJP, successor to the Bharatiya Jana Sangh. Of the numerous other groups, some of the most prominent are the RSS, the VHP, the Bajrang Dal and the ABVP. The Sangh Parivar has a history of inciting and participating in organised communal violence.
References:
• The Sangh Parivar, A Reader, Edited by Christophe Jaffrelot, OUP, 2006.
• Narendra Modi Facts: the Sangh Parivar.