David Thornley

David Andrew Thornley (31 July 1935 – 18 June 1978) was an Irish Labour Party politician and university professor at Trinity College Dublin.

He received a BA and PhD at Trinity College Dublin. His PhD was entitled "Isaac Butt and the creation of an Irish parliamentary party (1868–1879)" and was written under the supervision of Theodore William Moody. He was appointed Associate professor of Trinity in 1968. by then he had been working as a presenter on 7 Days since 1963. In 1964 he published the book Isaac Butt and Home Rule.

After joining Labour in 1969 he was elected to Dáil Éireann as a Labour Party Teachta Dála (TD) for the Dublin North-West constituency at the 1969 general election.

In December 1972 he called for the immediate release of Seán Mac Stíofáin, then leader of the Provisional IRA. In April 1976, he lost the Labour party whip after appearing on Sinn Féin platform during Easter Rising commemorations. In September 1976, he voted for the Criminal Justice (Jurisdiction) Bill despite misgivings. He told The Irish Times: "When I get very depressed I drink too much. When I voted for the Criminal Justice (Jurisdiction Bill) I went on the batter for a forthnight [sic]." In February 1977, he was re-admitted to the Labour Parliamentary party. He lost his seat at the 1977 general election.

In 1978 he joined the newly formed Socialist Labour Party stating that he had done so because: "There is no man in politics that I respect more than Noël Browne, despite our occasional differences. If the SLP is good for him, it's good enough for me".

Death and legacy On 12 June 1978 Thornley was admitted, with an illness of the liver and kidney, to Jervis Street Hospital. He died on 18 June 1978 in County Dublin, aged 42, of kidney disease. He is buried in Bohernabreen Cemetery in Dublin. The Trinity College Labour Branch was formerly named the David Thornley Branch in his honour.