In November 1966 Seán Lemass announced his decision to resign as Taoiseach and leader of the Fianna Fáil party.

Seán Lemass answers questions from reporters about his future, the future of the Fianna Fáil party and his successor.

I'm convinced that it's in the interests of the country and of the government and of the Fianna Fáil party that responsibility should now pass to a younger man.

Lemass believes that a change in the leadership of the Fianna Fáil party will help to secure the success of the party in future elections. Seán Lemass was succeeded by Jack Lynch who became leader of the party and Taoiseach on 10 November 1966.

Seán Lemass was a veteran of the 1916 Easter Rising, the War of Independence and the Civil War in Ireland. In 1924 he was first elected as a Sinn Féin TD for the Dublin South constituency and later re-elected for Dublin South–Central Constituency. He was a founder-member of Fianna Fáil in 1926, and served as Minister for Industry and Commerce, Minister for Supplies and Tánaiste in successive Fianna Fáil governments. He served as Taoiseach from 1959 until 1966. He died in the Mater Hospital in Dublin, on 11 May 1971 aged 71. 

An RTÉ News report broadcast on 8 November 1966.