A FOUNDING member of the IRSP has been described as a "dedicated republican socialist".
Jim Daly died peacefully in hospital on Tuesday surrounded by his family.
The noted academic was the former husband of Miriam Daly, a former IRSP chairperson, who was murdered by loyalists in her west Belfast home in 1980.
Both were both founding members of the party.
A former lecturer in scholastic philosophy at Queen's University, Mr Daly was known as a committed Marxist and dedicated Catholic.
In a Facebook statement the IRSP said it was saddened to learn of his death.
"Jim was a dedicated republican socialist activist who held senior roles within the IRSP," it said.
"He was held in continuously high esteem throughout
republican and socialist circles for his political intellectual abilities."
"Our thoughts are with the entire Daly family at this time."
Requiem Mass for Mr Daly will take place today at St Agnes' Church in west Belfast at 1pm with burial following at Milltown Cemetery.
