It began with the best of intentions. Worried about the effects of alcohol on American families, mothers and civic leaders started a movement to outlaw drinking in public places. Over time, their protests, petitions, and activism paid off--when a Constitional Amendment banning the sale and consumption of alcohol was ratified, it was hailed as the end of public drunkenness, alcoholism, and a host of other social ills related to booze. Instead, it began...