Jeffrey Moussaieff Masson (; born March 28, 1941, as Jeffrey Lloyd Masson) is an American author. Masson is best known for his conclusions about Sigmund Freud and psychoanalysis. In his The Assault on Truth (1984), Masson argues that Freud may have abandoned his seduction theory because he feared that granting the truth of his female patients' claims that they had been sexually abused as children would hinder the acceptance of his psychoanalytic methods. Masson is a veganism advocate and has written about animal rights.
Early life Jeffrey Masson is the son of Jacques Masson, a Frenchman of Bukharian Jewish ancestry, and Diana (Dina) Zeiger from an Ashkenazi Orthodox Jewish family. Masson's great-grandfather Shlomo Moussaieff was a kabbalist and founder of the Bukharian Quarter in Jerusalem. His grandfather Henry Mousaieff changed his family name from Moussaieff to Masson. Masson changed his middle name from Lloyd to Moussaieff. Both of his parents were followers of the guru Paul Brunton. Masson's mother later became a follower of mystic and philosopher John Levy. During the 1940s and 1950s, Brunton often lived with them, eventually designating Masson as his heir apparent. In 1956, Diana and Jacques Masson moved to Uruguay because Brunton believed that a third world war was imminent. Jeffrey and his sister Linda followed in 1959.
Studies At Brunton's urging, Masson went to Harvard University to study Sanskrit. While at Harvard, Masson became disillusioned with Brunton. Brunton and his influence on the Masson family form the subject of Masson's autobiographical book My Father's Guru: A Journey Through Spirituality and Disillusion. Harvard University granted Masson a B.A. magna cum laude in 1964 and a PhD with Honors in 1970. His degrees were in Sanskrit and Indian Studies. While undertaking his PhD, Masson also studied, supported by fellowships, at the École Normale Supérieure in Paris, the University of Calcutta, and the University of Poona.
Career Masson taught Sanskrit and Indian Studies at the University of Toronto, 1969–80, reaching the rank of Professor. From 1981 to 1992, he was a Research Associate, Department of South and Southeast Asian Studies, at the University of California, Berkeley. He was an Honorary Fellow in the Department of Philosophy at the University of Auckland. He later became Projects Director of the Sigmund Freud Archives and the author of numerous books, many about animals.
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