| Honorific-Prefix: | The Right Honourable |
| Lord Stanley | |
| Order1: | Secretary of State for Dominion Affairs |
| Term Start1: | 16 May 1938 |
| Term End1: | 16 October 1938 |
| Monarch1: | George VI |
| Primeminister1: | Neville Chamberlain |
| Predecessor1: | Malcolm MacDonald |
| Successor1: | Malcolm MacDonald |
| Constituency Mp2: | Fylde |
| Term Start2: | 15 November 1922 |
| Term End2: | 16 October 1938 |
| Predecessor2: | Wilfrid Ashley |
| Successor2: | Claude Lancaster |
| Constituency Mp3: | Liverpool Abercromby |
| Term Start3: | 28 June 1917 |
| Term End3: | 25 November 1918 |
| Predecessor3: | Richard Chaloner |
| Successor3: | Constituency abolished |
| Birth Date: | 1894 7, df=yes |
| Birth Place: | Marylebone, London |
| Death Place: | Marylebone, London |
| Spouse: | Hon. Sibyl Cadogan (1893–1969) |
| Children: | 3 |
| Parents: | Edward Stanley, 17th Earl of Derby Lady Alice Montagu |
Edward Montagu Cavendish Stanley, Lord Stanley, (9 July 1894 – 16 October 1938) was a British Conservative politician. The eldest son of the 17th Earl of Derby, he held minor political office before being appointed Secretary of State for Dominion Affairs in 1938, sitting in the cabinet alongside his brother Oliver Stanley. However, Stanley died only five months after this appointment, aged 44; his eldest son, Edward John Stanley, later succeeded to the earldom in his stead.
Stanley was born in Marylebone, London, the eldest son and heir apparent of Edward Stanley, later to become 17th Earl of Derby, by Lady Alice Montagu. He was spectacularly well-connected to leading political families.
His father was at the time of Stanley's birth Conservative MP for Westhoughton, Lancashire, and went on to serve as Secretary of State for War from 1916 to 1918 and from 1922 to 1924. His paternal grandfather, the 16th Earl of Derby, was a former Lancashire MP, Colonial Secretary, and Governor-General of Canada. His great-uncle, the 15th Earl, twice served as Foreign Secretary and was Prime Minister Lord Salisbury's stepfather, while his best-known ancestor was his great-grandfather, the 14th Earl, who was Leader of the Conservative Party for 22 years (1846–1868; the longest tenure in that office) and Prime Minister three times (1852, 1858–59, and 1866–68). His paternal grandmother, Lady Constance Villiers, was daughter of Lord Clarendon, who himself served on three occasions as Foreign Secretary. Lord Stanley's paternal uncles Sir Arthur and Sir George also served as Conservative MPs.
His maternal grandfather was William Montagu, 7th Duke of Manchester, also a Conservative peer and MP. His maternal grandmother Louisa von Alten married after the death of the Duke of Manchester, Spencer, Duke of Devonshire, also known as Lord Hartington, who for a time (before inheriting his peerage) was Leader of the Liberal Party in the House of Commons.
His sister Victoria married Neil Primrose, the son of Liberal Prime Minister Lord Rosebery. Oliver Stanley was his younger brother, and his son Richard became an MP.
He became known by the courtesy title Lord Stanley in 1908, when his father succeeded in the earldom of Derby. He was educated at Eton and Magdalen College, Oxford.
Lord Stanley was commissioned a second lieutenant on 2 July 1914. He was promoted to temporary lieutenant in the Grenadier Guards on 15 November 1914, later with seniority from 3 November 1914, and became a substantive lieutenant on 11 November 1914.
On 29 January 1916, he was made a supernumerary temporary captain with the Guards, relinquishing the rank on 12 May 1916. Lord Stanley was appointed adjutant of the newly formed Household Battalion on 9 September 1916, again as a temporary captain. He received a substantive captaincy on 26 September 1916 and served as adjutant until 12 January 1917.
He was appointed a staff captain and seconded on 13 August 1917, and made a brigade major on 22 January 1918, a post he held until 11 March 1918. He served as a general staff officer, 3rd grade, from 6 May 1918 to 8 October 1918. On 9 October 1918, he was again appointed a brigade major, serving in that capacity until 2 November 1919. Lord Stanley was awarded the Military Cross on 3 June 1919, for his service in Italy during the First World War. On 27 November 1920, he retired from the Army and entered the reserve of officers as a captain.
Lord Stanley was first elected to Parliament on 28 June 1917 in a by-election in Liverpool Abercromby. He left Parliament the following year, when the seat was abolished for the 1918 general election. During this time, he was the Baby of the House. He returned to Parliament in the 1922 general election when he was elected for Fylde. He served under Stanley Baldwin as a Junior Lord of the Treasury from 1924 to 1927 and was a Deputy Chairman of the Conservative Party from 1927 to 1929.
On the formation of the National Government after the 1931, Stanley was made Parliamentary and Financial Secretary to the Admiralty under Ramsay MacDonald. On 26 February 1934, he was admitted to the Privy Council. In 1935 he was made Under-Secretary of State for Dominion Affairs by Baldwin, and later that year was made Parliamentary and Financial Secretary to the Admiralty. Two years later, Lord Stanley became Under-Secretary of State for India and Burma.
On 16 May 1938 he entered the cabinet as Secretary of State for Dominion Affairs. His brother, Oliver, was also in the Cabinet as President of the Board of Trade. However, in October 1938, five months after being appointed to the cabinet, Lord Stanley died in Marylebone, aged 44. Neville Chamberlain paid tribute to him in the House of Commons:
Lord Stanley married the Honourable Sibyl Louise Beatrix Cadogan, daughter of Henry Cadogan, Viscount Chelsea, in 1917; they had three sons. He died in Marylebone, London, in October 1938, aged 44, predeceasing his father by ten years. His eldest son Edward succeeded his grandfather in the earldom in 1948. The second son, Richard, later became MP for Fylde North, and third son Hugh Henry Stanley (1926-1971) was the father of Edward Stanley, 19th Earl of Derby.[1] Lady Stanley died in June 1969, aged 76.