Recent sociological research has shown that the ideology of multiculturalism, after having been adopted as official policy in many countries, has generated more negative than positive effects (fragmentation of society, separation of minorities, cultural relativism). This article discusses the possible alternatives to multiculturalism, asking whether the path of interculturality can be a solution or not. The idea of interculturality has the advantage of stressing the inter, namely what lies in between different cultures. But it does not yet possess a conceptual and effective means to understand and handle the problems of the public sphere. To go over the failures of multiculturalism and the fragilities of interculturality, a lay approach to the coexistence of cultures is required, which is able to give strength back to Reason, through a new semantics of inter-human diversity. The author suggests the development of ‘relational reason’, beyond the forms of rationality already known. To make human reason rela...