Founded on 21 September, 1947 in Kozhikode, the Kerala Socialist Party (KSP) is a political party in India established under the leadership of Mathai Manjooran. Initially a small entity, the KSP gained significant public attention due to the efforts of its front-line leaders. The party became part of the coalition that formed the first democratically elected communist government in the world after San Marino. Within its first two-and-a-half decades, the KSP significantly influenced the Kerala state's post-independence political landscape.