““Once thing I’m convinced of is that cities are always shaped by what is the state of the art transportation device at the time,” Garreau told me in a phone interview. “If the transportation is shoe leather and donkey like at the time of Jesus, what you get is Jerusalem.” Ocean-going sails and wagons brought us cities like Boston and Amsterdam. Railroads created places like Chicago. The car got us Detroit and Los Angeles. And jet passenger planes brought us “world cities” like Atlanta, Dallas, Houston, and eventually Sydney and Beijing—as well as business-centered “edge cities” like Tysons.”