Seán Lemass was an Irish politician who served as the Taoiseach (Prime Minister) of Ireland from 1959 to 1966. He was a member of the Fianna Fáil party and played a significant role in modernizing the Irish economy. Lemass focused on attracting foreign investment and promoting industrial development, which helped to transform Ireland's economic landscape. Born on July 6, 1899, in Dublin, Lemass was involved in the Irish War of Independence and later became a prominent figure in the Irish government. His leadership style emphasized pragmatism and collaboration, contributing to his reputation as a key architect of Ireland's post-war economic policies.