 He suffered a brain haemorrhage early in July 2010 and died on 22 July 2010 in a St. John's hospital at the age of 46.Hart published several books on what he termed the "Irish Revolution" of 1916–1923, arguing that events like the Easter Rising (1916), the Irish War of Independence (1920–21) and the Irish Civil War (1922–23) were parts of a greater whole.The first was published in 1998 entitled "The IRA and Its Enemies, Violence and Community in Cork, 1916–1923", being a study of the organisation's social composition and activity in County Cork during the War of Independence.