14 Big Government Programs That Failed to Achieve Their Goals
” Prohibition was instituted with ratification of the Eighteenth Amendment to the United States Constitution on January 16, 1919, which prohibited the “…manufacture, sale, or transportation of intoxicating liquors within, the importation thereof into, or the exportation thereof from the United States…”
Congress passed the “Volstead Act” on October 28, 1919, to enforce the law, but most large cities simply ignored the law and bootlegged alcohol to meet demand, creating a huge black market rife with crime and corruption. Prohibition was repealed by the Twenty-First Amendment in 1933, essentially acknowledging the exercise had been pointless and counter-productive.”
YouViewed/Editorial 
legalizing it and taxing it sure did repair the economy
Reduced the bloodshed considerably too .
they could almost do another thing like that and get the same results