The Eighteenth—or, as it was popularly known, the Prohibition Amendment—made no restriction on drinking or possessing liquor, or on serving it to friends, or even to mere acquaintances. Nor was the purchase of alcoholic beverages declared illegal. All it prohibited was “the manufacture, sale, or transportation of intoxicating liquors” used for “beverage purposes.” Under the amendment, it was illegal to sell liquor but not against the law to buy it or own it.

