Briffault was born in either France or London, likely in 1874, the son of a French diplomat, Charles Frédéric Briffault, and the Scottish Margaret Mann (née Stewart). He later cited his year of birth as 1876, likely to be young enough to enter the army in the First World War.
He spent time in France and elsewhere in Europe following his father. After the death of his father in 1887, Briffault and his mother moved to New Zealand. Briffault received his MB and ChB from the University of Otago in New Zealand and commenced medical practice. After service on the Western Front during the war, (where he was twice awarded the Military Cross)), he settled in England where he turned to the study of sociology and anthropology. He also lived for some time in the USA, and later Paris.
Briffault is known for what is called Briffault's law:
The female, not the male, determines all the conditions of the animal family. Where the female can derive no benefit from association with the male, no such association takes place. — Robert Briffault, The Mothers. The matriarcal Theory of social origins, p21
It is a common argument used to demonstrate that in modern society, women tend to choose a sexual partner with the highest possible income. Actually, that sentence comes from the chapter Social relations among animals. Briffault never quoted it as a law, nor related directly to human behaviour.
Commentary on works
Primitive society, like many savage societies of our own time, was probably strictly matriarchal. The mother was the head of the family. ...What masculine authority there was resided in the mother's brother. He was the man of the family, and to him the children yielded respect and obedience. Their father, at best, was simply a pleasant friend who fed them and played with them; at worst, he was an indecent loafer who sponged on the mother. They belonged, not to his family, but to their mother's. As they grew up they joined their uncle's group of hunters, not their father's. This matriarchal organisation of the primitive tribe, though it finds obvious evidential support in the habits of higher animals, has been questioned by many anthropologists, but of late one of them, Briffault, demonstrated its high probability in three immense volumes [The Mothers: A Study of the Origins of Sentiments and Institutions]. It is hard to escape the cogency of his arguments, for they are based upon an almost overwhelming accumulation of facts. They not only show that, in what we may plausibly assume about the institutions of early man and in what we know positively about the institutions of savages today, the concepts inseparable from a matriarchate colour every custom and every idea: they show also that those primeval concepts still condition our own ways of thinking and doing things, so that "the societal characters of the human mind" all seem to go back "to the functions of the female and not to those of the male." Thus it appears that man, in his remote infancy, was by no means the lord of creation that he has since become."
- The Making of Humanity (1919)
- Psyche's Lamp: A Re-evaluation of Psychological Principles as a Foundation of All Thought (1921)
- The Mothers: A Study of the Origins of Sentiments and Institutions, Vol. II, Vol. III, (1927)
- Rational Evolution (1930)
- Sin and Sex (1931)
- Breakdown: The Collapse of Traditional Civilization (1932)
- Reasons for Anger: Selected Essays (1937)
- The Decline and Fall of the British Empire (1938)
- Marriage Past and Present (1956) edited radio debate between Briffault and Bronislaw Malinowski, originally published as a series in The Listener
- Les Troubadours et le Sentiment Romanesque (1945)
- The Troubadours (1965)
- Europa: A Novel of the Days of Ignorance (1935)
- "Europa." In Modern Women in Love: Sixty Twentieth-century Masterpieces of Fiction, The Dryden Press, 1945.
- Europa in Limbo (1937)
- The Ambassadress (1939)
- Fandango (1940)
- New Life of Mr. Martin (1947)
- "The Downfall of Old Europe," Part II, The English Review, February/March 1920.
- "Nemesis," The English Review, October 1920.
- "We," The English Review, November 1920.
- “Aristocracy,” The English Review, December 1920.
- "Inpersonality," The English Review, May 1921.
- "The Wail of Grub Street," The English Review, July 1921.
- "Will Monogamy Die Out?" In Ernest R. Groves and Lee M. Brooks, ed., Readings in the Family, J. B. Lippincott Company, 1934.
- "Birth Customs." In Edwin R. A. Seligman, ed., Encyclopedia of the Social Sciences, Vol. II, The Macmillan Company, 1930.
- "Mr. Robert Briffault". The Times. The Times Digital Archive. 15 December 1948. p. 7.
- Funk & Wagnell's New Encyclopedia 2006
- Time Sept 27, 1937 Book Review
- Passerini, Luisa (1999). Europe in Love, Love in Europe: Imagination and Politics in Britain Between the Wars. p. 150. Retrieved 18 March 2016.
- "England Births and Christenings, 1538–1975," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NFK9-J5T : accessed 18 March 2016), Robert Stephen Briffault, 8 November 1874; citing Kirkdale, Lancashire, England, reference yr 1874–1876 p 68; FHL microfilm 1,545,931.
- McMaster University Archives Archived 12 March 2007 at the Wayback Machine Briffault, Robert]
- Physician Writers Archived 31 August 2006 at the Wayback Machine A-C
- Time Magazine, July 18, 1932 People
- Marriage Past and Present: A debate between Robert Briffault and Bronislaw Malinowski (1956) edited by Ashley Montagu
- American Anthropologist, New Series, Vol. 51, No. 2 (Apr. – Jun. 1949), p. 341
- Charles Earle Funk, What's the Name, Please?, Funk & Wagnalls, 1936
- H. L. Mencken, Treatise on the Gods, Blue Ribbon Books, 1930, p. 84.
- L. H. Dudley Buxton, "The Mothers: A Study of the Origins of Sentiments and Institutions," Eugenics Review, Vol. XX, No. 2, July 1928.
- Suzanne Keller, "Does the Family Have a Future?," Journal of Comparative Family Studies, Vol. 2, No. 1, 1971.
- Katz, Edward A. (1976). The Social Philosophy of Robert Briffault: An Appraisal of His Writings, New York University, Graduate School, 1976.
- Sloan, Pat (1962). "An 'Unknown Soldier' in the Battle of Ideas," Marxism Today, Vol. VI, No. 5.
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