Abstract
Epidemiological studies of the last decade have shown a low prevalence of hypomania and bipolar I disorder in Western societies while pointing to a prevalence of unipolar mania in non-Western societies. This work seeks to investigate the explanatory role of the Stimmung concept to understand these differences, as much as the increase in the number of cases of mania in the West in the last two decades. It attempts to explore the relationship between the phenomenology of hypomania and its adaptation to the atmosphere of its environment. Our hypothesis is that the experience of hypomania would be in harmony with the narrative of Western societies and with Stimmung (in the sense of the term used by Spitzer and Heidegger) of these societies. Finally, we will present a clinical case and analyzes of business leadership manuals that will illustrate the phenomenological relationship of Stimmung and mania, as well as its transformation in the sphere of work.