Popular comic book writer Grant Morrison is on record as saying that Metropolis (home city of archetypal do-gooder Superman) is New York City by day, and Gotham City is New York by night. A physical impossibility, of course, and DC Comics have clearly placed them in physically different parts of the United States, but the intention is clear. This Jekyll-and-Hyde difference between the two metropolii is emphasized in the different approaches that Superman and Batman have regarding crime-fighting.