Mob Involvement with Prohibition In 1917 Congress passed the Eighteenth Amendment to the Constitution which prohibited the export, import, manufacture, sale, and transportation of alcoholic beverages in the United States. This new law is believed to have had the greatest effect on the twenties creating a feeling of rebellion and wild behavior. Many people thought this law violated there right to live by their own standards and have a good time. The Volstead Act passed by Congress set up penalties to all violators of the Eighteenth Amendment. Prohibition is one of the best things ever done by the United States Government. It single-handedly created new business opportunities a