Sassoon was a member of the prominent
Jewish Sassoon family and
Rothschild family. He was born in his mother's mansion on Avenue de Marigny,
Paris. His father was
Sir Edward Albert Sassoon, 2nd Baronet, MP, son of
Albert Abdullah David Sassoon; his mother was
Aline Caroline, daughter of Gustave Samuel de Rothschild. His sister was
Sybil Sassoon, who married the
Marquess of Cholmondeley. He was a cousin of the war poet
Siegfried Sassoon. He was descended from the banking family of Frankfurt. When aged only nineteen years old his great-grandfather,
James Rothschild was sent to Paris to set up the family business in France. James became wealthy. When he died in 1868 he was buried in
Père Lachaise Cemetery. His branch of the Sassoon-Rothschild family kept the Jewish faith, donated to Jewish charities and founded synagogues. His great-grandfather
David Sassoon had been imprisoned in Baghdad in 1828, and in 1832 he established his business
David Sassoon & Co. at Bombay. He took advantage of British rule to return to Baghdad to trade. The family eventually established a Head Office at 12, Leadenhall Street, London and a company branch in Manchester. The Sassoons became assimilated Jews, dressing, acting and thinking like Englishmen. The Sassoon brothers, David and Albert, were friends of the Prince of Wales, and built the 'Black Horse' brand. The business came with a baronetcy of Kensington Gore. His father bought Shorncliffe Lodge, in Sandgate Kent, where his cousin
Mayer Rothschild was the MP. His father was not a successful backbencher, but the political influences had a profound effect on young Philip. He was educated at Farnborough Prep school and
Eton before going up to Oxford. At Eton, Sassoon made friends such as
Denys Finch-Hatton. Old Etonian
Arthur Balfour recommended the Debating Society to him. His father was also friendly with
Frances Horner, wife of
Sir John Horner, a longtime friend of
Gladstone who lived at Mells Manor in Somerset. His house master was a member of the secret society of liberals, the Young Apostles. Also a near contemporary was
Osbert Sitwell, the Yorkshireman and author. A French scholar, he learned the language doing classes at Windsor Castle. Sassoon was taught aesthetics by Henry Luxmoore giving an insight into philosophy and social realism. However he chose to read Modern History at
Christ Church, Oxford. He was one of only 25 Jewish undergraduates, but was invited to join the
Bullingdon Club. He joined the
East Kent Yeomanry while still at Oxford and was commissioned as a second lieutenant. Philip Sassoon entered Parliament in 1912. After the death of his relative David Gubbay (1865–1928), Sassoon became
chairman of his family's company, David Sassoon & Co., although his participation in the management of it was only nominal. However, he continued to be a shareholder. A 2016 biography,
Charmed Life: The Phenomenal World of Philip Sassoon by
Damian Collins, his successor as Member of Parliament for Hythe, provides a great deal of additional information about Sassoon. A summary by
The Guardian includes this comment:Sassoon enjoyed witty gossip, but was never spiteful. He spoke with a clipped sibilant lisp, and liked to relax in a blue silk smoking jacket with slippers of zebra hide. He had fickle, moody fascinations with young men with whom he soon grew bored, but was loyally appreciative of female friends and kept an inner court of elderly, cultivated, ironical bachelors. His sexuality was central to his character and activities, but there is never any hint of sexual activity in the many memories of him. One hates to think that he was as sublimated as he sounds. His restlessness and fatalism, which were notorious among his friends, killed him at the age of 50 in 1939: although his physicians ordered bed rest after a viral infection, he hurtled about in unnecessary gaieties until his body was beyond recovery. ==First World War==