Prohibition was bad for the world

From the God of Knowledge Wikipedia

"In the 1890s, ethanol (grain alcohol) was the first fuel used by American cars. Alcohol powered engines were used in farm machines, train locomotives, and cars in Europe and the United States. In 1919, Prohibition police destroyed corn-alcohol stills which many farmers made their low cost ethanol fuel with. Prohibition taxes slowed the use of ethanol as a fuel. This increased farmers' expenses and forced them to rely on oil, which was cheap then."

And prohibition arguably set up the drug industry. When alcohol could no longer be bought legals, gangsters filled the hole in the market. When prohibition ended they had competition from cheap, legal alcohol producers, so they turned to illegal drugs to make their money.