Social Sciences and History / Unit 12 SSH 1122 short lesson, about 20 seconds
Megacity, Megalopolis, World City
Captions available
The idea
A megacity is a very large city with primacy and high centrality; Finlayson's threshold is ten million. A megalopolis is a chain of metropolitan areas: Boswash; the Blue Banana, northwest England to northern Italy. A world city conducts a disproportionate share of the world's business.
In practice
Mexico City, twenty-two million.
Where people slip
Gateway cities link regions; shock cities change fast.
Your place on the trail
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Unlocks
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