James Connolly was an Irish socialist and revolutionary leader known for his role in the Easter Rising of 1916 against British rule in Ireland. He was a key figure in advocating for workers' rights and socialism in Ireland, emphasizing the need for a revolutionary movement that united both nationalist and socialist ideals. Connolly's beliefs and actions during World War I positioned him as an important figure in the struggle for Irish independence and influenced the post-war political landscape in Ireland.