Prohibition and the Collapse of American Brewing
In 1916, the United States had approximately 1,300 commercial breweries producing a rich variety of regional styles shaped by waves of German, Czech, British, and Irish immigration. By 1935, two years after Prohibition ended, fewer than 160 survived. The fourteen-year gap not only destroyed businesses; it erased recipes, broke supply chains, disbanded experienced workforces, and accelerated the consolidation that would reduce American brewing to a handful of national brands producing a single homogenized style by the 1970s. Understanding Prohibition means understanding why American craft beer had to reinvent traditions that should never have been lost.
The 18th Amendment
The National Prohibition Act — more commonly called the Volstead Act after its principal legislative sponsor — took effect on January 17, 1920, implementing the 18th Amendment to the Constitution, ratified in 1919. The amendment prohibited the manufacture, sale, and transportation of intoxicating liquors. It did not prohibit personal possession or consumption of liquor acquired before the amendment took effect, a loophole that allowed wealthy Americans to cellar existing stocks. It also did not initially prohibit home production of fermented cider and "non-intoxicating" beverages — a provision that was gradually tightened but never fully closed.
The temperance movement that produced Prohibition had been building since the 1830s. The Women's Christian Temperance Union, founded in 1874, and the Anti-Saloon League, founded in 1893, were remarkably effective single-issue political organizations that built coalition support across Protestant denominations, rural communities, and progressive reformers who genuinely believed that alcohol was the primary driver of urban poverty, domestic violence, and immigrant criminality. The argument was not entirely wrong — the nineteenth-century American saloon had genuine social pathologies — but the cure proved worse than the disease.
The Scale of Destruction
American brewing in 1916 was not simply large; it was geographically and stylistically diverse in ways that are difficult to reconstruct from surviving records. German immigrant communities in Milwaukee, Cincinnati, St. Louis, and Chicago had built breweries producing Munich-style lagers, Märzen, Bock, and Weizen alongside the American light lager that was becoming the commercial mainstream. Bohemian immigrants in Chicago and New York had brought Czech Pilsner traditions. English and Irish immigrants had established porter and stout breweries in eastern cities. Each region had developed house character through local water, grain, and yeast cultures refined over generations.
When the act took effect, most breweries simply stopped production. Some converted to legal businesses: Anheuser-Busch, the largest American brewer before Prohibition, diversified into baker's yeast, malt syrup, refrigerated trucks, soft drinks (including a grape soda), and ice cream. They survived and returned to brewing in 1933 in stronger competitive position than before. Yuengling, America's oldest brewery (founded 1829 in Pottsville, Pennsylvania), survived by producing near-beer (de-alcoholized beer below 0.5% ABV) and converting part of its operation to a dairy producing Yuengling ice cream. The dairy side of the business continues today.
Miller, Pabst, and Schlitz survived through similar diversification. Smaller regional and local breweries, lacking capital for diversification and facing the permanent loss of their operating licenses, simply closed. The specific yeasts, hop varieties in cultivation, water adjustment protocols, and recipes associated with those breweries disappeared with them.
Illegal Production and the Speakeasy
Prohibition did not end alcohol consumption; it redirected it into illegal channels. Speakeasies — unlicensed drinking establishments — proliferated across American cities, supplied by bootleggers importing spirits from Canada and the Caribbean or distilling domestically. Fermented beverages were harder to bootleg than spirits because of volume: a barrel of beer weighs over 160 kg and is difficult to transport covertly. The practical consequence was that spirits gained market share relative to beer during Prohibition, reversing the pre-Prohibition trend of beer displacing whiskey. When Prohibition ended, American drinkers had developed a lighter-alcohol preference and a suspicion of heavy beer that persisted for decades.
The quality of speakeasy beer was often poor — rapidly produced by brewers working with inferior ingredients under time pressure, consumed from venues with no quality control. This reinforced a market preference for lighter, safer-tasting beer that advantaged the surviving large breweries when legitimate production resumed.
Repeal and the Recovery
The 21st Amendment, ratified on December 5, 1933, repealed national Prohibition but left each state the authority to regulate alcohol within its borders. Many states retained partial Prohibition for years — Kansas had county-level prohibitions as late as 1948, and Mississippi maintained state Prohibition until 1966. The patchwork of state and local regulations that survives today — dry counties, Sunday closing laws, grocery store beer sales restrictions, tied house prohibitions — is largely Prohibition's legacy.
The 160 or so surviving breweries that could quickly return to production in 1933 were overwhelmingly the large, nationally oriented companies that had the capital to survive. They produced a single style — American lager, lighter and lower in bitterness than most pre-Prohibition examples — and spent the next four decades consolidating market share through advertising, refrigeration infrastructure, and predatory pricing. By 1979, the number of American brewing companies had fallen further to 44, and the five largest controlled roughly 75% of national production. Fritz Maytag's acquisition of the failing Anchor Brewing in 1965 and Ken Grossman's founding of Sierra Nevada in 1979 are the foundational acts of the reaction against this consolidation.
What Was Lost
The specific losses from Prohibition are impossible to fully enumerate. The Cream Ale tradition — a distinctly American style blending ale and lager techniques, light-colored and lightly hopped — largely disappeared and was not meaningfully revived until the 1980s. American porter and stout brewing, which had genuine depth in cities like Philadelphia and Baltimore, vanished almost entirely. The German-American regional lager traditions of Cincinnati, Milwaukee, and St. Louis — which had developed house characters distinct from the national brands — were not recovered. The specific yeast strains that produced characteristic flavors in pre-Prohibition American ales are gone; craft brewers attempting historical reconstruction work from newspaper accounts, patent filings, and recipe books of questionable accuracy.
What survived was partly accidental. The Anchor Steam style — a hybrid fermentation process unique to San Francisco — was preserved only because Fritz Maytag bought the brewery before it could close. The Yuengling Lager recipe was maintained through the near-beer years and is a plausible (if uncertain) connection to pre-Prohibition American lager.
Explore on the map
Anchor Brewing in San Francisco (now closed but historically significant) and Yuengling in Pottsville, Pennsylvania are both on the interactive map as monuments to the pre- and post-Prohibition story. Open the map to find them alongside the craft breweries that rebuilt what was lost.