If you’ve ever thought of visiting the crocodile-shaped island of Cuba, or run into someone recently returned from sultry nights in the country’s salsa halls, there’s a good chance you’ll have heard the phrase “See it before it changes.” And I don’t mean because of Hurricane Melissa. The idea is that the centrally planned communist state, one of the last on Earth, will soon morph into America and a balmy Brigadoon full of people unencumbered by money, modern cars or Alexa will evaporate. I think most people, if they knew what Cubans have endured, wouldn’t use that phrase, which is...