On October 5, 1977, Seamus Costello, aged 38, leader of the Irish Republican Socialist Party (IRSP), was shot dead in Dublin. His assassination marked a significant and tragic event in Irish political history, as he was the first Irish party leader to be killed. Costello was a prominent figure in republican politics, having been involved in both the Official Irish Republican Army and the Irish National Liberation Army before co-founding the IRSP. His death was a result of internal republican feuds during a turbulent period.
