Beer in the United States
On January 16, 1919, the Eighteenth Amendment to the United States Constitution was enacted into law, creating the Prohibition era, wherein the production, sale and transportation of alcoholic beverages was made illegal. All legal American brewing came to a halt when prohibition was imposed, though the earlier temperance movement had already reduced the number of breweries significantly. Only a few breweries, mainly the largest, were able to stay in business by manufacturing near beer, malt syrup, or other non-alcohol grain products, in addition to soft drinks such as colas and root beers. Production and shipping of alcohol was largely confined to illegal operations that could deliver compact distilled beverages—smuggled rum and domestic moonshine—more efficiently and reliably than bulkier products such as beer.
Prohibition in the United States
The historian Kenneth D. Rose corroborates historian John Burnham's assertion that during the 1920s "there is no firm evidence of this supposed upsurge in lawlessness" as "no statistics from this period dealing with crime are of any value whatsoever". Rose writes:
During the Prohibition era, rates of absenteeism decreased from 10% to 3%. In Michigan, the Ford Motor Company documented "a decrease in absenteeism from 2,620 in April 1918 to 1,628 in May 1918."