Abstract. The article examines the history and development of the concept of possible worlds, originating from G. Leibniz, and fictionality, which is an analytical tool of logic and other branches of philosophy today. The author analyses how attitudes towards fictionality have changed in philosophy and literary criticism, and how this has influenced the emergence of possible worlds as an interdisciplinary problem. Particular attention is paid to the types of fiction that emerged as a result of interdisciplinary dialogue between philosophy and literary studies.

Keywords: possible worlds, fictionality, culture of intellectual leisure, fiction, fictional text,

literature discourse