title_body: Has Prohibition ever worked?
upvoted_answer: Prohibition was an Era in American history from 1920-1933 - and - it failed miserably. If anything, it made alcohol more popular.  
  
  Prohibition, in general, also means to prohibit something via law or religion though. The religious aspect is the only case that one can see prohibition working. ::Insert Mormonism/Islamic religion/et cetera here::