Augustine Mary Moore Stack, Irish republican and politician who serves as Minister for Home Affairs from 1921 to 1922, is born on December 7, 1879, in Ballymullen, Tralee, County Kerry. He is a Teachta Dála (TD) from 1918 to 1927.

Stack is born to William Stack, an attorney’s clerk, and Nanette O’Neill. He is educated at the Christian Brothers School in Tralee. At the age of fourteen, he leaves school and becomes a clerk in a solicitor‘s office. A gifted Gaelic footballer, he captains the Kerry team to All-Ireland victory in 1904. He also serves as President of the Kerry Gaelic Athletic Association County Board.

Stack becomes politically active in 1908 when he joins the Irish Republican Brotherhood (IRB). In 1916, as commandant of the Kerry Brigade of the Irish Volunteers, he makes preparations for the landing of arms by Roger Casement. He is made aware that Casement was arrested on Easter Saturday and was being held in Tralee. He makes no attempt to rescue him from Ballymullen Barracks.

Stack is arrested and sentenced to death for his involvement in the Easter Rising, however, this is later commuted to penal servitude for life. He is released under general amnesty in June 1917 and is elected as an abstentionist Sinn Féin MP for West Kerry at the 1918 Irish general election, becoming a member of the First Dáil. He is elected unopposed as an abstentionist member of the House of Commons of Southern Ireland and a member of the Second Dáil as a Sinn Féin TD for Kerry–Limerick West at the 1921 Irish elections.

Stack, as part of his role as Minister for Home Affairs, is widely credited with the creation and administration of the Dáil Courts. These are courts run by the Irish Republican Army (IRA) in parallel and opposition to the judicial system being run by the British government. The IRA and Sinn Féin are highly successful in both getting the civilian population of Ireland to use the courts and accept their rulings. The success of this initiative gives Sinn Féin a large boost in legitimacy and supports their goals in creating a “counter-state” within Ireland as part of their overarching goals in the Irish War of Independence.

Stack opposes the Anglo-Irish Treaty of 1921 and takes part in the subsequent Irish Civil War. He is captured in 1923 and goes on hunger strike for forty-one days before being released in July 1924.

Stack is elected to the Third Dáil at the 1922 Irish general election and subsequent elections as an Anti-Treaty Sinn Féin TD for the Kerry constituency. When Éamon de Valera founds Fianna Fáil in 1926, Stack remains with Sinn Féin, being re-elected to the Dáil at the June 1927 Irish general election. He does not contest the September 1927 Irish general election.

In 1925, Stack marries Winifred (Una) Gordon, (née Cassidy), the widow of a Royal Irish Constabulary (RIC) district inspector, Patrick Gordon.

Stack’s health never recovers following his hunger strike and he dies at the age of 49 in a Dublin hospital on April 27, 1929.

Austin Stack Park in his hometown of Tralee, one of the Gaelic Athletic Association’s stadiums, is named in his honour, as is the Austin Stacks GAA hurling and Gaelic football club.