This article examines how debates about multiculturalism evolved in western societies. In the first part, it presents the different meanings of the term \u2018multiculturalism\u2019 when it applies to diverse types of cultural difference within society: native and sub-state national groups, discriminated groups within society and immigrants. Highlighting the polysemy of the term, three theoretical approaches to multicultural issues are introduced and critically discussed: multiculturalism as a normative issue, as an (anti) ideology and as a feature of current societies. In its central part, the article considers the different criticisms that, since the beginning of the 21st century, have called for a retreat from multiculturalism, which is ...