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.
Temperance movement in the United States
The last wave of temperance in the United States saw the rise of the Anti-Saloon League (ASL), which successfully pushed for National Prohibition from its enactment in 1920 to its repeal in 1933. This heavily prohibitionist wave attracted a diverse coalition: doctors, pastors, and eugenicists; Klansmen and liberal internationalists; business leaders and labor radicals; conservative evangelicals and liberal theologians.