Éamon e Valera (IPA: /ˈeɪmən dɛvəˈlɛrə/) (born Edward George de Valera) 14 October 1882 – 29 August 1975) was one of the dominant political figures in 20th century Ireland. Co-owner of one of the Irish Press Newspapers, he served in public office from 1917 to 1973, holding the various Irish prime ministerial and presidential offices. He was a significant leader of Ireland's struggle for independence from the United Kingdom of Great Britain and Ireland in the early 20th century, and the Republican anti-Treaty opposition in the ensuing Irish Civil War. After the formation of Fianna Fáil, his militant republicanism moderated towards conservatism. De Valera is also often cited as the principal author of Bunreacht na hÉireann (the Constitution of Ireland).