Moscow is the big one I missed, and would place them instead of Cairo or Tehran. I included Cairo because I couldn't decide between it and Tehran. Chicago is on there because of the global influence made on finance (creation of modern commodity exchange, stock yards), architecture and planning (first skyscrapers, Burnham's master plan, Mies), culture (electric blues, 20th century novels), manufacturing (railroad hub, most steel mills anywhere in the world til 1970s), political culture (the en vogue slur "Chicago style politics"), social activity (Chicago School of sociology, Jane Addams, labor stuff like Pullman and Haymarket Riot), etc.