To Lévi-Strauss's anthropological eye, comparison with others is the condition for discovering one own's identity; but only by avoiding the two extremes of total closure or indiscriminate openness does it become a positive element of growth and inner evolution. In this essay I consider how this assumption could help us today in dealing with the delicate topic of the relation between human rights culture (which is indeed universalist in character, but developed in the West), and Islamic culture (geographically and historically relative, and yet to a certain extent also universalist).