Forster was born into an Anglo - Irish and Welsh middle class family at 6 Melcombe Place, Dorset Square, London NW1, in a building that no longer exists. He was the only child of Edward Morgan Llewellyn Forster and Alice Clara "Lily" (née Whichelo). His father, an architect, died of tuberculosis on 30 October 1880. Among Forster's ancestors were members of the Clapham Sect. He inherited £8,000 (£659,300 as of 2011), from his paternal great - aunt Marianne Thornton (daughter of the abolitionist Henry Thornton), who died on 5 November 1887. The money was enough to live on and enabled him to become a writer. He attended the famous public school Tonbridge School in Kent as a day boy. The theatre at the school is named after him.

At King's College, Cambridge, between 1897 and 1901, he became a member of a discussion society known as the Apostles (formally named the Cambridge Conversazione Society). Many of its members went on to constitute what came to be known as the Bloomsbury Group, of which Forster was a peripheral member in the 1910s and 1920s. There is a famous recreation of Forster's Cambridge at the beginning of The Longest Journey.

After leaving university he travelled in continental Europe with his mother. He visited Egypt, Germany and India with the classicist Goldsworthy Lowes Dickinson in 1914. By that time, Forster had written all but one of his novels. In the First World War, as a conscientious objector, he volunteered for the International Red Cross, travelling to Alexandria, Egypt.

Forster spent a second spell in India in the early 1920s as the private secretary to Tukojirao III, the Maharajah of Dewas. The Hill of Devi is his non-fictional account of this trip. After returning from India, he completed his last novel, A Passage to India (1924), for which he won the James Tait Black Memorial Prize for fiction. He also edited the graphic letters from India of Eliza Fay (1756 - 1816).

In the 1930s and 1940s Forster became a successful broadcaster on BBC Radio and a public figure associated with the British Humanist Association. He was awarded a Benson Medal in 1937.

Forster developed a long term loving relationship with Bob Buckingham, a married policeman (his wife's name was May), and included the couple in his circle, which also included the writer and arts editor of The Listener, J.R. Ackerley, the psychologist W.J.H. Sprott, and, for a time, the composer Benjamin Britten. Other writers with whom Forster associated included the poet Siegfried Sassoon and the Belfast based novelist Forrest Reid.

From 1925 until her death at age 90 on 11 March 1945, the novelist lived with his mother in West Hackhurst, Abinger Hammer, finally leaving on or around 23 September 1946. His London base was 26 Brunswick Square from 1930 to 1939, after which he rented 9 Arlington Park Mansions in Chiswick until at least 1961.

Forster was elected an honorary fellow of King's College, Cambridge, in January 1946, and lived for the most part in the college, doing relatively little. He declined a knighthood in 1949 and was made a Companion of Honour in 1953. In 1969 he was made a member of the Order of Merit. Forster died of a stroke in Coventry on 7 June 1970 at the age of 91, at the home of the Buckinghams. Forster was a humanist, homosexual, lifelong bachelor.

Forster had five novels published in his lifetime. Although Maurice appeared shortly after his death, it had been written nearly sixty years earlier. A seventh novel, Arctic Summer, was never finished.

His first novel, Where Angels Fear to Tread (1905), is the story of Lilia, a young English widow who falls in love with an Italian man, and of the efforts of her bourgeois relatives to get her back from Monteriano (based on San Gimignano). The mission of Philip Herriton to retrieve her from Italy has features in common with that of Lambert Strether in Henry James's The Ambassadors, a work Forster discussed ironically and somewhat disapprovingly in his book Aspects of the Novel (1927). Where Angels Fear to Tread was adapted into a film by Charles Sturridge in 1991.

Next, Forster published The Longest Journey (1907), an inverted bildungsroman following the lame Rickie Elliott from Cambridge to a career as a struggling writer and then to a post as a schoolmaster, married to the unappetising Agnes Pembroke. In a series of scenes on the hills of Wiltshire which introduce Rickie's wild half - brother Stephen Wonham, Forster attempts a kind of sublime related to those of Thomas Hardy and D.H. Lawrence.

Forster's third novel, A Room with a View (1908), is his lightest and most optimistic. It was started before any of his others, as early as 1901, and exists in earlier forms referred to as "Lucy". The book is the story of young Lucy Honeychurch's trip to Italy with her cousin, and the choice she must make between the free - thinking George Emerson and the repressed aesthete Cecil Vyse. George's father Mr Emerson quotes thinkers who influenced Forster, including Samuel Butler. A Room with a View was filmed by Merchant - Ivory in 1985.

Where Angels Fear to Tread and A Room with a View can be seen collectively as Forster's Italian novels. Both include references to the famous Baedeker guidebooks and concern narrow minded middle class English tourists abroad. The books share many themes with short stories collected in The Celestial Omnibus and The Eternal Moment.

Howards End (1910) is an ambitious "condition - of - England" novel concerned with different groups within the Edwardian middle classes represented by the Schlegels (bohemian intellectuals), the Wilcoxes (thoughtless plutocrats) and the Basts (struggling lower middle class aspirants).

It is frequently observed that characters in Forster's novels die suddenly. This is true of Where Angels Fear to Tread, Howards End and, most particularly, The Longest Journey.

Forster achieved his greatest success with A Passage to India (1924). The novel takes as its subject the relationship between East and West, seen through the lens of India in the later days of the British Raj. Forster connects personal relationships with the politics of colonialism through the story of the Englishwoman Adela Quested, the Indian Dr. Aziz, and the question of what did or did not happen between them in the Marabar Caves. Forster makes special mention of Ahmed Ali and his Twilight in Delhi in his Preface to its Everyman's Library Edition.

Maurice (1971) was published posthumously. It is a homosexual love story which also returns to matters familiar from Forster's first three novels, such as the suburbs of London in the English home counties, the experience of attending Cambridge, and the wild landscape of Wiltshire. The novel was controversial, given that Forster's sexuality had not been previously known or widely acknowledged. Today's critics continue to argue over the extent to which Forster's sexuality, even his personal activities, influenced his writing.

In the United States, interest in, and appreciation for, Forster was spurred by Lionel Trilling's E.M. Forster: A Study, which began:

E. M. Forster is for me the only living novelist who can be read again and again and who, after each reading, gives me what few writers can give us after our first days of novel reading, the sensation of having learned something.