The last time Miami was relevant, it wasn’t important. In the 1980s, Miami provided nothing more than drugs, clubs, pastel blazers, jai alai gambling and, most notably, a hit TV show about all four.
But now Miami is the most important city in America. Not because Miami stopped being a frivolous, regulation-free, climate-doomed tax haven dominated by hot microcelebrities. It became the most important city in America because...