Many groups in the USA feared what alcohol was doing.
The temperance movement argued that childrens health was at danger.
The prohibition movement had powerful support, a national ban was introduced by the volstead act of 1920
It became easy to find speakeasies in cities, these were supplied by bootleggers who smuggled alcohol into the US
Rival gangs ran this illegal but profitable trade, gang warfare was common, in chicago there was 130 murders and no arrests in 1926-27
The most famous gangster was Al Capone. In 1929 he organised the st valentines day massacre
The act was repealed by Roosevelt in 1933.
Prohibition failed because it didnt stop people drinking, instead it made them drink more dangerous things like moonshine which caused blindness or death