Prohibition may not have created Capone. But instead of being just a street thug and petty criminal, Prohibition allowed Capone to become CEO of a Fortune 500 company.
.......along with a little help from old family friend Johnny Torrio.
Prohibition did for Al Capone what the wheel did for humanity. To say otherwise is to ignore history. Prohibition made criminal out of one in forty Americans and in the city of Chicago, law and order broke down completly with the city government and the police were in league with the boot leggers.
Capone had blood on his hands years before Prohibition. Crime in many states fell dramatically too during Prohibition. There were far bigger criminals before and after him though, but some libertarians always have an excuse for criminals. They need to mother them. Its maternal.