Ireland's Sinn Fein is a left-wing political party in Ireland that was founded in 1905. It is the largest Irish republican party in the country and has been a major force in Irish politics since the early 20th century. The party advocates for a united Ireland and has been involved in the peace process in Northern Ireland. The name Sinn Fein translates to 'ourselves alone' in Irish, and the party is committed to achieving its goals through peaceful means.