One of the greatest dividends of the revival in cocktail culture that began in the 1990s has been the relentless innovation. More new cocktails—and good ones—have been invented in the past thirty years than during any period since the first golden age of cocktails, which lasted from roughly the 1870s until the arrival of Prohibition in 1920 and included the birth of the Martini, Manhattan, Daiquiri, and Tom Collins.   Just as that first bar-world zenith produced a half-century of classic recipes before Prohibition, the eruption of talent over the past three decades has handily delivered its share of drinks that have found favor with arbiters on both sides of the bar. Among them are the Espresso Martini, White Negroni, Death Flip, Old Cuban, Paper Plane, Siesta, and many more, all included here along with each drink's recipe origin story.   What elevates a modern cocktail into the echelon of a modern classic? A host of reasons, all delin