Catholic Church in Ireland
In the 2016 Irish census 78.3% of the population identified as Catholic in Ireland; numbering approximately 3.7 million people. Unlike Catholics in the United States, Ireland has seen a significant decline from the 84.2% who identified as Catholic in the 2011 census.
Irish Australians
Irish Catholics comprised a quarter of Australia's population in the early 20th century. They were largely working-class and voted for the Labor Party. The referendum on conscription in 1917, following the Easter Uprising in Dublin, caused an identification between the Irish, Sinn Féin, and the anti-conscription section of Labor. Pro-conscription forces exploited this, denouncing outspoken anti-conscription Catholics, such as Archbishop Mannix, and T. J. Ryan, the Premier of Queensland, for disloyalty. In general, Protestants, armed with the authority of tradition, championed the idea of Australia as an integral part of the Empire; and Catholics, freed from that authority by their Irish origins and their working-class affiliations, looked to the future by placing Australia first and the Empire second. There was no simple correlation between Catholicism, Protestantism and conscription, but the idea of an anti-conscription Catholic-Labor alliance stuck for many years.