In 19th-century psychiatry, monomania (from Greek monos, one, and mania, meaning "madness" or "frenzy") was a form of partial insanity conceived as single pathological preoccupation in an otherwise sound mind. Partial insanity, variations of which enjoyed a long pre-history in jurisprudence, was in contrast to the traditional notion of total insanity, exemplified in the diagnosis of mania, as a global condition affecting all aspects of understanding and which reflected the position that the mind or soul was an indivisible entity. Coined by the French psychiatrist Jean-Étienne Dominique Esquirol (1772–1840) around 1810, monomania was a new disease-concept characterised by the presence of an expansive idée fixe in which the mind was diseased and deranged in some facets but otherwise normal