There are a number of political parties in the Republic of Ireland, and coalition governments are common. The state is unusual as a developed nation in that politics is not primarily characterised by the left-right political divide. This is because the two largest political parties Fianna Fáil and Fine Gael do not identify themselves first and foremost as either centre-right or centre-left parties. Rather, both parties arose from the great split that occurred in Irish politics at the time of the 1922–1923 Civil War, that followed the foundation of the state. Both descended from factions of the original Sinn Féin party: Fine Gael from the faction that supported the 1921 Anglo-Irish Treaty and Fianna Fáil from the anti-Treaty faction. This enduring characteristic of the Irish party system is sometimes pejoratively referred to as "Civil War politics".