Keywords: diversity, inequality, segregation, flight, asylum, development, interculture, urban networks, integration, district work, city as political actor, utopia, mobility, migration, economic relations
No city without migration. One of the paradoxes of the theme is that migration has to do with urban utopias as well as with the perceived threats to an intact world, with urban nightmares that are probably of similar age. The industrialisation of the 19th century created a historically new type of settlement characterised by migration. Global migration, as we have experienced it since the 1990s, is becoming a fundamentally new challenge, particularly because of its diversity. The global growth of urban centres is the result of migration. Today, 55% of the world's population live in cities, by 2050 it will be 68%. Internal migration (rural depopulation) generally exceeds cross-border migration (232 million vs. 740 million UN/UNEP 2009/2013). Migration "from outside" poses greater challenges due to increased diversity, but also greater opportunities for growth and innovation.