Alfred Richard Orage (1873-1934) was an influential British Editor best known for the magazine New Age. He began attending Ouspensky's London talks in 1921 then met Gurdjieff when the latter first visited London early in 1922. Shortly thereafter, Orage sold New Age and relocated to Gurdjieff's institute at the Prieré and in 1924 was appointed by Gurdjieff to lead the institute's branch in New York. After Gurdjieff’s nearly fatal automobile accident in July 1924 and because of his prolonged recuperation during 1924 and intense writing period for several years, Orage continued in New York until 1931. During this period, Orage was responsible for editing the English typescript of Beelzebub's Tales (1931) and Meetings with Remarkable Men (1963) as Gurdjieff' assistant. This period is described in some detail by Paul Beekman Tayloy in his Gurdjieff and Orage: Brothers in Elysium (2001).

Gurdjieff (Russian: Гео́ргий Ива́нович Гурджи́ев, Greek: Γεώργιος Γεωργιάδης, Armenian: Գեորգի Գյուրջիև) was born to a Caucasus Greek father, Ἰωάνης Γεωργιάδης (Yiannis Georgiades), and an Armenian mother, Evdokia (according to biographer Paul Beekman Taylor), in Alexandropol (now Gyumri), Armenia, then part of the Russian Empire in the Transcaucasus. The name Gurdjieff represents a Russified form of the Pontic Greek surname "Georgiades" (Greek: Γεωργιάδης). The exact year of his birth remains unknown; conjectures range from 1866 to 1877. Some authors (such as Moore) argue for 1866. Both Olga de Hartmann, the woman Gurdjieff called "the first friend of my inner life", and Louise Goepfert March, Gurdjieff's secretary in the early 1930s, believed that Gurdjieff was born in 1872. A passport gave a birthdate of November 28, 1877, but he once stated that he was born at the stroke of midnight at the beginning of New Year's Day (Julian calendar). Although the dates of his birth vary, the year of 1872 is inscribed in a plate on the gravemarker in the cemetery of Avon, Seine-et-Marne, where his body was buried.[1]

Peter D. Ouspensky (1878-1947) was a Russian Journalist, author and Philosopher. He met Gurdjieff in 1915 and spent the next five years studying with him, then formed his own independent groups at London in 1921. Ouspensky became the first "career" Gurdjieffian and led independent Fourth Way groups in London and New York for his remaining years. He wrote In Search of the Miraculous about his encounters with Gurdjieff and it remains the best known and most widely read account of Gurdjeff's early experiments with groups.

Kenneth Macfarlane Walker (1882–1966) was a prominent British surgeon and prolific author. He was a member of Ouspensky's London group for decades and after the latter's death in 1947 visited Gurdjieff in Paris many times. As well as many accessible medical books for lay readers, he wrote some of the earliest informed accounts of Gurdjieff's ideas, Venture with Ideas (1951) and A Study of Gurdjieff's Teaching (1957).

Jane Heap (1883-1964) was an American Writer, Editor, Artist, and publisher. She met Gurdjieff during his 1924 visit to New York, and set up a Gurdjieff study group at her apartment in Greenwich Village. In 1925, she moved to Paris to study at Gurdjieff’s Institute, re-established her group in Paris until 1935 when Gurdjieff sent her to London to lead the group C. S. Nott had established and which she continued to lead until her death. Jane Heap's Paris group became Gurdjieff's 'Rope' group after her departure and contained several notable Writers including, Margaret Anderson, Solita Solano, Kathryn Hulme and others who proved helpful to Gurdjieff while he was editing his first two books.

Maurice Nicoll (1884-1953) was a Harley Street Psychiatrist and Carl Jung's delegate in London. Along with Orage he attended Ouspensky's 1921 London talks where he met Gurdjieff. With his wife Catherine and their new-born daughter, he spent almost a year at Gurdjieff's Prieuré institute. A year later, when they returned to London, Nicoll rejoined Ouspensky's group. In 1931, on Ouspensky's advice he started his own Fourth Way groups in England. He is best known for the encyclopedic six volume series of articles in Psychological Commentaries on the Teaching of Gurdjieff and Ouspensky (Boston: Shambhala, 1996, and Samuel Weiser Inc., 1996).

Thomas de Hartmann (1885-1956) was a Russian Composer. He and his wife Olga first met Gurdjieff in 1916 at Saint Petersburg. They remained Gurdjieff's close students until 1929. During that time they lived at Gurdjieff's Institute for the Harmonious Development of Man near Paris. Between July 1925 and May 1927 Thomas de Hartmann transcribed and co-wrote some of the music that Gurdjieff collected and used for his Movements exercises. They collaborated on hundreds of pieces of concert music arranged for the piano. This concert music was first recorded and published privately from the 1950s to 1980s; then first issued publicly as the Music of Gurdjieff / de Hartmann, Thomas de Hartmann, piano by Triangle Records, with 49 tracks on 4 vinyl disks in 1998, then reissued as a 3-CD set in containing 56 tracks in 1989. A more extensive compilation was later issued as the Gurdjieff / de Hartmann Music for the Piano in 4 printed volumes by Schott between 1996 and 2005, and as audio CDs under the same title in four volumes with nine discs recorded with three concert Pianists, by Schott/Wergo between 1997 and 2001. Olga de Hartmann (née Arkadievna, 1885-1987) was Gurdjieff's personal secretary during their Prieuré years and took most of the original dictations of his writings during that period. She also authenticated Gurdjieff's early talks in the book Views from the Real World (1973). The de Hartmann's memoir, Our Life with Mr Gurdjieff (1st ed, 1964, 2nd ed, 1983, 3rd ed 1992), records their Gurdjieff years in great detail. Their Montreal Gurdjieff group, literary and musical estate is represented by retired Canadian National Film Board Producer Tom Daly.

Willem Nyland (1890-1975) was a Dutch-American Chemist who first met Gurdjieff early in 1924 during the latter's first visit to the US. He was a charter member of the NY branch of Gurdjieff's Institute, participated in Orage's meetings between 1924 and 1931 and was a charter member of the Gurdjieff Foundation from 1953 and through its formative years. In the early 1960s he established an independent group in Warwick NY, where he began making reel-to-reel audio recordings of his meetings which became archived in a private library of some 2600, 90 minute audio tapes. Many of these tapes have also been transcribed and indexed, but remain unpublished. Gurdjieff Group Work with Wilhem (sic-Willem) Nyland (1983) by Irmis B. Popoff, sketches Nyland's group work.

John G. Bennett (1897-1974) was a British intelligence officer, polyglot (fluent in English, French, Turkish and Russian), technologist, industrial research Director and author best known for his many books on psychology and spirituality, particularly the teachings of Gurdjieff. Bennett met both Ouspensky and then Gurdjeiff at Istanbul in 1921, spent August 1922 at Gurdjieff's institute, became Ouspensky's pupil between 1922 and 1941 and, after learning that Gurdjieff was still alive, was one of Gurdjieff's frequent visitors in Paris during 1949. See Witness: the Autobiography of John Bennett (1974), Gurdjieff: the Making of a New World(1974), Idiots in Paris: diaries of J. G. Bennett and Elizabeth Bennett, 1949 (1991).

Jeanne de Salzmann (1899-1990). Alexander and Jeanne de Salzmann met Gurdjieff in Tiflis in 1919. She was originally a Dancer, Dalcroze Eurythmics Teacher. She was, along with Jessmin Howarth and Rose Mary Nott, responsible for transmitting Gurdjieff's choreographed movements exercises and institutionalizing Gurdjieff's teachings through the Gurdjieff Foundation of New York, the Gurdjieff Institute of Paris, London's Gurdjieff Society Inc and other groups, she established in 1953. She also established Triangle Editions in the US, which imprint claims copyright on all Gurdjieff's posthumous writings.

Henry John Sinclair, 2nd Baron Pentland (1907-1984) was a pupil of Ouspensky's during the 1930s and 1940s. He visited Gurdjieff regularly in Paris in 1949, then was appointed as President of the Gurdjieff Foundation of America by Jeanne de Salzmann when she founded that institution at New York in 1953. He established the Gurdjieff Foundation of California in the mid 1950s and remained President of the US Foundation branches until his death. Pentland also became President of Triangle Editions when it was established in 1974.

In early adulthood, according to his own account Gurdjieff's curiosity led him to travel to Central Asia, Egypt, Iran, India, Tibet and Rome before he returned to Russia for a few years in 1912. He was always unforthcoming about the source of his teachings. The only account of his wanderings appears in his book Meetings with Remarkable Men. Most commentators leave his background unexplained, and it is not generally considered to be a reliable or straightforward autobiography. Each chapter is named after an individual "remarkable man"; many are putatively members of a society of "seekers of truth".

From 1913 to 1949, the chronology appears to be based on material that can be confirmed by primary documents, independent witnesses, cross-references and reasonable inference. On New Year's Day in 1912, Gurdjieff arrived in Moscow and attracted his first students, including his cousin, the Sculptor Sergey Merkurov, and the eccentric Rachmilievitch. In the same year, he married the Polish Julia Ostrowska in Saint Petersburg. In 1914, Gurdjieff advertised his ballet, The Struggle of the Magicians, and he supervised his pupils' writing of the Sketch Glimpses of Truth. In 1915, Gurdjieff accepted P. D. Ouspensky as a pupil, and in 1916, he accepted the Composer Thomas de Hartmann and his wife, Olga, as students. Then, he had about 30 pupils. Ouspensky already had a reputation as a Writer on mystical subjects and had conducted his own, ultimately disappointing, search for wisdom in the East. The Fourth Way "system" taught during this period was complex and metaphysical, partly expressed in scientific terminology.

In the midst of revolutionary upheaval in Russia, Gurdjieff left Petrograd in 1917 to return to his family home in Alexandropol. During the Bolshevik Revolution, he set up temporary study communities in Essentuki in the Caucasus, then in Tuapse, Maikop, Sochi and Poti, all on the Black Sea coast of southern Russia, where he worked intensively with many of his Russian pupils. Gurdjieff said, "Begin in Russia, End in Russia".

Gurdjieff's music divides into three distinct periods. The "first period" is the early music, including music from the ballet Struggle of the Magicians and music for early movements dating to the years around 1918.

In 1919, Gurdjieff and his closest pupils moved to Tbilisi. There, Gurdjieff's wife Julia Ostrowska, the Stjoernvals, the Hartmanns, and the de Salzmanns gathered the fundamentals of his teaching. Gurdjieff concentrated on his still unstaged ballet, The Struggle of the Magicians. Thomas de Hartmann (who had made his debut years ago, before Czar Nicholas II of Russia) worked on the music for the ballet, and Olga Ivanovna Hinzenberg (who years later wed the American Architect Frank Lloyd Wright) practiced the ballet dances. In 1919, Gurdjieff established his first Institute for the Harmonious Development of Man.

The "second period" music, for which Gurdjieff arguably became best known, written in collaboration with Russian Composer Thomas de Hartmann, is described as the Gurdjieff-de Hartmann music. Dating to the mid-1920s, it offers a rich repertory with roots in Caucasian and Central Asian folk and religious music, Russian Orthodox liturgical music, and other sources. This music was often first heard in the salon at the Prieuré, where much was composed. Since the publication of four volumes of this piano repertory by Schott, recently completed, there has been a wealth of new recordings, including orchestral versions of music prepared by Gurdjieff and de Hartmann for the Movements demonstrations of 1923–24. Solo piano versions of these works have been recorded by Cecil Lytle, Keith Jarrett , Frederic Chiu.

In August 1921 and 1922, Gurdjieff travelled around western Europe, lecturing and giving demonstrations of his work in various cities, such as Berlin and London. He attracted the allegiance of Ouspensky's many prominent pupils (notably the Editor A. R. Orage). After an unsuccessful attempt to gain British citizenship, Gurdjieff established the Institute for the Harmonious Development of Man south of Paris at the Prieuré des Basses Loges in Avon near the famous Château de Fontainebleau. The once-impressive but somewhat crumbling mansion set in extensive grounds housed an entourage of several dozen, including some of Gurdjieff's remaining relatives and some White Russian refugees.

During this period, Gurdjieff acquired notoriety as "the man who killed Katherine Mansfield" after Katherine Mansfield died there of tuberculosis under his care on 9 January 1923. However, James Moore and Ouspensky convincingly show that Mansfield knew she would soon die and that Gurdjieff made her last days happy and fulfilling.

In parallel with other spiritual traditions, Gurdjieff taught that a person must expend considerable effort to effect the transformation that leads to awakening. The effort that is put into practice Gurdjieff referred to as "The Work" or "Work on oneself". According to Gurdjieff, "...Working on oneself is not so difficult as wishing to work, taking the decision." Though Gurdjieff never put major significance on the term "Fourth Way" and never used the term in his writings, his pupil P.D. Ouspensky from 1924 to 1947 made the term and its use central to his own teaching of Gurdjieff's ideas. After Ouspensky's death, his students published a book titled The Fourth Way based on his lectures.

Gurdjieff's mother died in 1925 and his wife developed cancer and died in June 1926. Ouspensky attended her funeral. According to Fritz Peters, Gurdjieff was in New York from November 1925 to the spring of 1926, when he succeeded in raising over $100,000. He was to make six or seven trips to the US, where he alienated a number of people with his brash and impudent demands for money. Some have interpreted that in terms of his following the Malamatiyya technique of the Sufis, he was deliberately attracting disapproval.

Pauwels claimed that Karl Haushofer, the father of geopolitics whose protegee was Deputy Reich Führer Rudolf Hess, was one of the real "seekers after truth" described by Gurdjieff. According to Rom Landau, a Journalist in the 1930s, Achmed Abdullah told him at the beginning of the 20th century that Gurdjieff was a Russian secret agent in Tibet who went by the name of "Hambro Akuan Dorzhieff" (i.e. Agvan Dorjiev), a tutor to the Dalai Lama. However, the actual Dorzhieff went to live in the Buddhist temple erected in St. Petersburg and after the revolution was imprisoned by Stalin. James Webb conjectured that Gurdjieff might have been Dorzhieff's assistant Ushe Narzunoff (i.e. Ovshe Norzunov).

Despite his fund-raising efforts in America, the Prieuré operation ran into debt and was shut down in 1932. Gurdjieff constituted a new teaching group in Paris. Known as The Rope, it was composed of only women, many of them Writers, and several lesbians. Members included Kathryn Hulme, Jane Heap, Margaret Anderson and Enrico Caruso's widow, Dorothy. Gurdjieff became acquainted with Gertrude Stein through Rope members, but she was never a follower.

In 1935, Gurdjieff stopped work on All and Everything. He had completed the first two parts of the planned trilogy but only started on the Third Series. (It was later published under the title Life Is Real Only Then, When 'I Am'.) In 1936, he settled in a flat at 6, Rue des Colonels-Renard in Paris, where he was to stay for the rest of his life. In 1937, his brother Dmitry died, and The Rope disbanded.

Gurdjieff's former students who have criticized him argue that, despite his seeming total lack of pretension to any kind of "guru holiness," in many anecdotes his behavior displays the unsavory and impure character of a man who was a cynical manipulator of his followers. Gurdjieff's own pupils wrestled to understand him. For Example, in a written exchange between Luc Dietrich and Henri Tracol dating to 1943: "L.D.: How do you know that Gurdjieff wishes you well? H.T.: I feel sometimes how little I interest him—and how strongly he takes an interest in me. By that I measure the strength of an intentional feeling."

After the war, Gurdjieff tried to reconnect with his former pupils. Ouspensky was reluctant, but after his death (October 1947), his widow advised his remaining pupils to see Gurdjieff in Paris. J. G. Bennett also visited from England, the first meeting for 25 years. Ouspensky's pupils in England had all thought that Gurdjieff was dead. They discovered he was alive only after the death of Ouspensky, who had not told them that Gurdjieff was still living. They were overjoyed to hear so, and many of Ouspensky's pupils including Rina Hands, Basil Tilley and Catherine Murphy visited Gurdjieff in Paris. Hands and Murphy worked on the typing and retyping of the forthcoming book All and Everything.

Gurdjieff suffered a second car accident in 1948 but again made an unexpected recovery.

The "last musical period" is the improvised harmonium music which often followed the dinners Gurdjieff held at his Paris apartment during the Occupation and immediate post-war years to his death in 1949. In all, Gurdjieff in collaboration with de Hartmann composed some 200 pieces. In May 2010, 38 minutes of unreleased solo piano music on acetate was purchased by Neil Kempfer Stocker from the estate of his late step-daughter, Dushka Howarth. In 2009, Pianist Elan Sicroff released Laudamus: The Music of Georges Ivanovitch Gurdjieff and Thomas de Hartmann, consisting of a selection of Gurdjieff/de Hartmann collaborations (as well as three early romantic works composed by de Hartmann in his teens). In 1998 Alessandra Celletti released "Hidden Sources" (Kha Records) with 18 tracks by Gurdjieff/de Hartmann.

Three books by Gurdjieff were published in the English language in the United States after his death: Beelzebub's Tales to His Grandson published in 1950 by E. P. Dutton & Co. Inc., Meetings with Remarkable Men, published in 1963 by E. P. Dutton & Co. Inc., and Life is Real Only Then, When 'I Am', printed privately by E. P. Dutton & Co. and published in 1978 by Triangle Editions Inc. for private distribution only. This trilogy is Gurdjieff's legominism, known collectively as All and Everything. A legominism is, according to Gurdjieff, "one of the means of transmitting information about certain events of long-past ages through initiates". A book of his early talks was also collected by his student and personal secretary, Olga de Hartmann, and published in 1973 as Views from the Real World: Early Talks in Moscow, Essentuki, Tiflis, Berlin, London, Paris, New York, and Chicago, as recollected by his pupils.

Louis Pauwels wrote Monsieur Gurdjieff (first edition published in Paris, France in 1954 by Editions du Seuil). In an interview, Pauwels said of the Gurdjieff work: "... After two years of exercises which both enlightened and burned me, I found myself in a hospital bed with a thrombosed central vein in my left eye and weighing ninety-nine pounds... Horrible anguish and abysses opened up for me. But it was my fault."

Colin Wilson writes about "Gurdjieff's reputation for seducing his female students. (In Providence, Rhode Island, in 1960, a man was pointed out to me as one of Gurdjieff's illegitimate children. The professor who told me this also assured me that Gurdjieff had left many children around America)."

The posthumous second series, edited by Jeanne de Salzmann is titled Meetings with Remarkable Men(1963) and is written in a seemingly accessible manner as a memoir of his early years, but also contains some 'Arabian Nights' embellishments and allegorical statements. His posthumous Third Series, written as if unfinished and also edited by Jeanne de Salzmann (Life Is Real Only Then, When 'I Am') contains an intimate account of Gurdjieff's inner struggles during his later years, as well as transcripts of some of his lectures. There is an enormous and growing amount written about Gurdjieff's ideas and methods but his own challenging writings remain the primary sources.

The feature film Meetings with Remarkable Men (1979), loosely based on Gurdjieff's book by the same name, ends with performances of Gurdjieff's dances taught known simply as the "exercises" but later promoted as movements. Jeanne de Salzmann and Peter Brook wrote the film, Brook directed, and Dragan Maksimovic and Terence Stamp star, as does South African Playwright and actor, Athol Fugard.

In Beelzebub's Tales to His Grandson (see bibliography), Gurdjieff expresses his reverence for the founders of the mainstream religions of East and West and his contempt (by and large) for what successive generations of believers have made of those religious teachings. His discussions of "orthodoxhydooraki" and "heterodoxhydooraki"—orthodox fools and heterodox fools, from the Russian word durak (fool)—position him as a critic of religious distortion and, in turn, as a target for criticism from some within those traditions. Gurdjieff has been interpreted by some, Ouspensky among others, to have had a total disregard for the value of mainstream religion, philanthropic work and the value of doing right or wrong in general.