Cities are our destiny. Visions of a non- or de-urbanizing world, while interesting and important intellectual creations of the 20th century, arIn a world where the number of young people has become the largest in history relative to the adult population, the need to take urgent and ever more innovative approaches to the problems facing them is greater than ever.e no longer credible.

Cities are our destiny. Visions of a non- or de-urbanizing world, while interesting and important intellectual creations of the 20th century, are no longer credible.