Objective. The purpose of this article is to present the issues related to monomania in the clinical and socio-legal context, with a focus on Polish literature.
Views. Monomania was a diagnostic term, especially popular in France in the nineteenth century, which appeared in the first clinical classifications of mental illness. On the one hand, the concept of monomania, gave rise to the isolation of depression and mania in the modern sense, and on the other, it contributed to the development of knowledge about delusional, anxiety and personality disorders. Apart from its clinical significance, monomania occurred in a broader social and legal context, initiating a discussion on diminished responsibility. Monomania was also broadly discussed in the Polish psychiatric literature of the second half of the nineteenth century, which followed its development and defined its conceptual changes. In the first half of the twentieth century monomania appeared in Polish psychiatric literature mostly in the context of the discussion about diminished responsibility. Polish psychiatrists participated in the creation of legislation concerning diminished responsibility, which was adopted in Poland adopted in 1932.