There was widespread support for socialism in Ireland during the revolutionary period - and the potential for socialist revolution existed in this country at the time.
You had People's Democracy which was led by people like Michael Farrell, Eamonn McCann & Bernie Devlin. You had the Officials & the National Liberation Front, you had the Irish Republican Socialist Movement which included the IRSP & INLA. The Repubican Socialist Collective & Irish People's Liberation Organization.
The Provos even tho they were not a Socialist movment per say, their main objective was the establishment of Democratic Socialist Republic.