Answer
The Lanka Sama Samaja Party (LSSP), the first Marxist party in Sri Lanka, was instrumental in galvanizing the working class and the emerging intelligentsia. Founded by a group of intellectuals, including N.M. Perera and Philip Gunawardena, it advocated for social and economic equality, workers' rights, and the abolition of colonialism. The LSSP played a significant role in Sri Lanka's independence movement and subsequent political landscape.