Claim: The Irish Marxist Society resulted from a split in the Communist Party of Ireland, which was founded in 1933.
Evidence: The IMS was the result of a split in the Communist Party of Ireland. The Communist Party of Ireland (CPI; Irish: Páirtí Cumannach na hÉireann) is an all-Ireland Marxist–Leninist party, founded in 1933. 
3–4 June 1933 (3–4 June 1933) The IMS was the result of a split in the Communist Party of Ireland. 
Minor splits from the CPI included the Eurocommunist-inspired Irish Marxist Society. 3–4 June 1933 (3–4 June 1933)