"The Internet, which I think of as a sort of meta-city, has made it possible for people who don’t live in cities to master areas of expertise that previously required residence in a city, but I think it’s still a faith in concentrated choice that drives migration to cities.
Migration to cities is now so powerful, so universal, that people will create cities, of sorts, simply through migration—cities that literally consist mainly of the people who inhabit them on a given day."