Fitzgerald portrays the 1920s as an era of decayed social and moral values, evidenced in its overarching cynicism, greed, and empty pursuit of pleasure. The reckless jubilance that led to decadent parties and wild jazz music—epitomized in The Great Gatsby by the opulent parties that Gatsby throws every Saturday night—resulted ultimately in the corruption of the American dream, as the unrestrained desire for money and pleasure surpassed more noble goals. When World War I ended in 1918, the generation of young Americans who had fought the war became intensely disillusioned, as the brutal carnage that they had just faced made the Victorian social morality of early-twentieth-century America seem like stuffy, empty hypocrisy. The dizzying rise of the stock market in the aftermath of the war led to a sudden, sustained increase in the national wealth and a newfound materialism, as people began to spend and consume at unprecedented levels. A person from any social background could, potentially, make a fortune, but the American aristocracy—families with old wealth—scorned the newly rich industrialists and speculators. Additionally, the passage of the Eighteenth Amendment in 1919, which banned the sale of alcohol, created a thriving underworld designed to satisfy the massive demand for bootleg liquor among rich and poor alike.