Second are the emerging peaks that use established ideas, often imported, to produce goods and services. Some of these cities, such as Dublin and Seoul, are transitioning into places that generate innovation, but most, from Guadalajara to Shanghai, function primarily as the manufacturing and service centers of the 21st-century global economy.

The two remaining types of places are being left behind: third-world megacities distinguished by large-scale "global slums," with high levels of social and political unrest and little meaningful economic activity; and the huge valleys of the spiky world, rural areas with little concentration of population or economic activity.
Image: Silicon Valley's capital city San Jose, California. | Photograph: Helene Labriet-Gross/AFP/Getty Images Also read: Steve Case's new gig

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