Mass foreign-culture immigration sharply increases the heterogeneity of the population of developed regions of the world, generating both serious risks and new possibilities for their development. To withstand challenges and use the advantages of diversity, host states look for more adequate models of managing plural societies. An alternative to the existing approaches to integrating immigrants and their descendants is interculturalism, which implies establishing positive intercultural interaction between people, which would be based on the commonalities of their needs and interests. This concept is embodied in intercultural practices of several cities; there have been positive results. However, such practices have not been adapted for use at a higher territorial level thus far.