Anushilan Samiti
Anushilan Samiti (Ōnūshīlōn sōmītī, "lit": body-building society) was a Bengali Indian organisation that existed in the first quarter of the twentieth century, and propounded revolutionary violence as the means for ending British rule in India. The organisation arose from a conglomeration of local youth groups and gyms ("Akhara") in Bengal in 1902. It had two prominent, if somewhat independent, arms in East and West Bengal identified as Dhaka Anushilan Samiti centred in Dhaka (modern day Bangladesh), and the Jugantar group (centred at Calcutta) respectively.
Anushilan Samiti
Through the 1920s and 1930s, many Anushilan members began identifying with Communism and leftist ideologies. Many of them studying Marxist–Leninist literature whilst serving long jail sentences. A minority section broke away from the Anushilan movement and joined the Communist Consolidation, and later the Communist Party of India. Former Jugantar leader Narendranath Bhattacharya, now known as M. N. Roy, became an influential member of the Communist International, helping to find the Communist Party of India. The majority of the Anushilanite Marxists, whilst having adopted Marxist–Leninist thinking, felt hesitant over joining the Communist Party. Holding sharp differences with the CPI and Royist ideologies, the Anushilan marxists decided to join Congress Socialist Party (CSP), but keeping a separate identity within the party. The RSP, which derived from the "Samiti", held a strong influence in parts of Bengal. The psrty sent two parliamentarians in the 1952 Lok Sabha elections, both previously "Samiti" members. In 1969 RSP sympathizers in East Pakistan formed the Shramik Krishak Samajbadi Dal (SKSD). RSP and SKSD have maintained close ties since. The RSP is a minor partner in the Left Front which ruled the Indian state of West Bengal for 34 uninterrupted years. It also holds influence in South India, notably in parts of Kerala. The SUCI, another left wing party with a presence in Bengal, was founded in 1948 by Anushilan members.