[3] The council of SNDP Yogam decided to form a political party on 1974 November, on the basis of that decision the party was formed and declared in 1975 March 13 with the blessings of the SNDP Yogam,[4][5] with an intention of the upliftment of backwards, dalits and minorities to establish social justice by providing Democratic, Socialist, Casteless and Classless and Secular pattern of Society.
The party had entered into the agitation for the implementation of Mandal commission report for the establishment of communal reservation.
N. Sreenivasan, renowned leader of SRP and SNDP, become the minister for excise representing party in the ministry headed by Karunakaran.
N. Sreenivasan became elected to the Kerala Legislative Assembly in 1982 from Kottayam constituency, held the portfolio of excise minister in the ministry headed by K Karunakaran.
(which is now known as the "dark era of SRP") the party is kept idle by the Ranjith in order to protect the interests of SNDP yogam general secretary Vellapally Nadesan and his son Thushar Vellappaly In 2011, A group of socialists under the leadership of O V Sreedath, who had been the former state secretary of Kerala State Committee of Janatha Dal (S), joined the party.