Any megalopolis reflects its multifaceted social and cultural diversity, which is simultan Leading Analysteously a unique resource and a vulnerability of urban development. More and more often, the dynamic of formation and evolution of ethnic communities in global cities is taking on a spontaneous character, which renders such communities unpredictable and difficult to manage. ? What risks are inherent in the social diversity of agglomerations and cities? ? What working models with social and cultural diversity exist in the world? ? What urban planning tools make it possible to uncover the potential inherent in socially and culturally diverse megalopolises?