An idée fixe is a preoccupation of mind believed to be firmly resistant to any attempt to modify it, a fixation. The name originates from the French idée [i.de], "idea" and fixe [fiks], "fixed."
Background
The initial introduction of the term idée fixe, according to intellectual historian Jan E. Goldstein, was as a medical term around 1812 in connection with monomania. As originally employed in the nineteenth and early twentieth centuries, idée fixe was "a single pathology of the intellect", distinct from monomania, a broader term that included idée fixe, but also a wider range of pathologies that did not stem from "a single compelling idea or from an emotional excess". A second difference is that the victim of idée fixe was understood to be unaware of the unreality of their frame of mind, while the victim of monomania might be aware. At that time, idée fixe was discussed as a form of neurosis or monomania.
The meaning of monomania in the technical medical sense in which it was first used, was very close to the popular meaning it would soon acquire. It denoted an idée fixe, a single pathological preoccupation in an otherwise sound mind.
— Jan E. Goldstein, Console and Classify, p. 155
The idea of monomania was developed by Jean-Étienne Dominique Esquirol as a diagnostic category in his work Des Malades Mentales (1839) and related to the idée fixe by Wilhelm Griesinger (1845) who viewed "every single idée fixe [as] the expression of a deeply deranged psychic individuality and probably an indicator of an incipient form of mania".
The "pathologicalization" of political convictions was used to discredit political anarchists. The further historical evolution of idée fixe was much entangled with the introduction of psychologists into legal matters such as the insanity defense, and is found in a number of texts.
Legal implications
Possibly the best example of the role of idée fixe in an insanity defense today is its use in identifying the paranoid personality disorder.
A frequent manifestation of ... paranoid personality is the presence of an overvalued idea ... a fixed idea (idée fixe) ... which might seem reasonable both to the patient and to other people. However, it comes to dominate completely the person's thinking and life. ... It is quite distinct phenomenologically from both delusion and obsessional idea.
— Femi Oyebode, The expression of disordered personality
The development of the notion
The concept of idées fixes has been expanded and refined by Emil Kraepelin (1904), Carl Wernicke (1906), and Karl Jaspers (1963), evolving into a concept of overvalued ideas. An overvalued idea is a false or exaggerated and sustained belief that is maintained with much less than delusional intensity (i.e., the individual is able to acknowledge the possibility that the ideas may not be true).
In literature
An example of an idée fixe is in Cervantes's Don Quixote:
Don Quixote reveals his kinship to the most commonly encountered of Cervantes's character types: the head-in-clouds fantasist, obsessed by his idée fixe.
— Anthony J Close, Miguel de Cervantes, Don Quixote
Molière also used the idée fixe repeatedly:
Molière's more celebrated comic characters, Arnolphe, Orgon, Alceste, Harpagon, Monsieur Jourdain, Argan: each of them displays to the very end the obsession or idée fixe which colors his outlook on life. It is a characteristic of Molière's heroes that they are never ‘converted’: in every case the dénouement, far from curing them of their folly, merely confirms them in it.
— William Driver Howarth, Molière, a playwright and his audience'
Although Melville's Captain Ahab may come to mind as another famous example of idée fixe, and it is sometimes referred to this way, more often Ahab's obsession is referred to as monomania (the more inclusive term), and Melville himself does that. It would seem from the description of Ahab's possession that idée fixe applies quite accurately, as the following description suggests:
"Not one jot of his great natural intellect had perished." ... "Yielding up all his thoughts and fancies to his one supreme purpose", Ahab has let his mind's guiding and directing power be usurped by the "sheer inveteracy" of a will driven by "one unachieved revengeful desire"
— Quotes from Moby-Dick, pp. 990, 1007, Thomas Cooley, The ivory leg in the ebony cabinet: madness, race, and gender in Victorian America
However, what makes monomania the better term is that "Captain Ahab ... has an inkling of his true state of mind: 'my means are sane, my motive and my object mad.'"
The words idée fixe also occur explicitly: for example, in Arthur Conan Doyle's Sherlock Holmes:
There is the condition which the modern French psychologists have called the 'idée fixe', which may be trifling in character, and accompanied by complete sanity in every other way. A man might form such an idée fixe... and under its influence be capable of any fantastic outrage.
— Arthur Conan Doyle, The return of Sherlock Holmes
and in Abraham B. Yehoshua's novel about the Mani family through six generations:
...I had begun to despair of his accursed idée fixe which devoured every other idée that it encountered...
— Abraham B. Yehoshua, Mr. Mani
and in the account of the war on terror by George Bush's counter-terrorism chief Richard A. Clarke:
Iraq was portrayed as the most dangerous thing in national security. It was an idée fixe, a rigid belief, received wisdom, a decision already made and one that no fact or event could derail.
— Richard A Clarke, Against All Enemies: Inside America's War on Terror
Today's usage
As an everyday term, idée fixe may indicate a mindset akin to prejudice or stereotyping:
However, idée fixe has also a pathological dimension, denoting serious psychological issues, as in this account of Japanese culture for a popular audience:
Although her husband did not reproach her, she became like a woman possessed, continually begging for his forgiveness. This he readily gave, but her guilt—and his imagined umbrage—had become for her an idée fixe. Unable to stomach food, she went into a decline and died soon thereafter.
— Jack Seward, The Japanese
The pathology is what is denoted in psychology and in the law, as in this technical article about anorexia nervosa:
The idée fixe—staying thin—becomes at its furthest extreme so powerful as to render any other ideas or life projects meaningless. ... "I felt all inner development was ceasing, that all becoming and growing were being choked, because a single idea was filling my entire soul"
— Susan Bordo, Toward a new psychology of gender
Idée fixe began as a parent category of obsession, and as a preoccupation of mind the idée fixe resembles today's obsessive-compulsive disorder: although the afflicted person can think, reason and act like other people, they are unable to stop a particular train of thought or action. However, in obsessive-compulsive disorder, the victim recognizes the absurdity of the obsession or compulsion, not necessarily the case with an idée fixe, which normally is a delusion. Today, the term idée fixe does not denote a specific disorder in psychology, and does not appear as a technical designation in the Diagnostic and statistical manual of mental disorders. Nonetheless, idée fixe is used still as a descriptive term,[10] and appears in dictionaries of psychology.
