John Michael Kerr (January 31, 1950 – July 18, 2016) was an American author raised in New York City and best known for his nonfiction book A Most Dangerous Method, which examined the relationship between Sigmund Freud, Carl Jung, and Sabina Spielrein.
A Most Dangerous Method is the result of an eight-year examination of the relationship between Sigmund Freud, Carl Jung and Sabina Spielrein, and creates a new narrative of the birth of psychoanalysis. John Kerr not only gives Spielrein her proper recognition for contributions to analytic theory, but gives fresh perspective on the Freud-Jung stalemate that resulted in the two parting ways.
Random House published A Most Dangerous Method in 1993, to the outrage of the psychoanalytical community. In November 1993 Frederick Crews wrote "The Unknown Freud", an essay published in the New York Review of Books, which used Kerr's book review as a platform to attack Freud's methods and practices. The essay would result in the largest influx of letters to the editor in the history of the New York Review of Books.