Bourbon is so tied to Kentucky that the two have become almost inseparable in the public imagination. Yet nothing in federal law requires the spirit to be made there. The law only says it must be produced in the United States, from a mash of at least 51 percent corn, aged in new charred oak barrels, and bottled without added flavor or color. In theory, a distillery in Alaska could produce legal bourbon.
In practice, 95 percent of it is made in Kentucky. The reasons for that concentration reach back more than two centuries, to a tax revolt, a happy accident of geology, and a legend about a preacher who may have charred a barrel by mistake. The story does not begin in Kentucky at all. In the late eighteenth century, Scottish, Irish, and German settlers along the eastern coast of the future United States brought with them generations of knowledge about distilling grain into strong liquor.
In Europe, they had worked with barley. In the New World, they found corn in abundance, and they adapted. In Pennsylvania and Virginia, a tradition was born of turning the local crop into whiskey. Farms without a still were rare.
A bushel of grain could be hauled to town and sold for a pittance, and the price could drop by half along the road. Turning that grain into whiskey made far better economic sense. The whiskey was more valuable, easier to transport, and could be stored in barrels almost indefinitely. In the western colonies, where coins and paper money were scarce, whiskey became a medium of exchange.
Settlers used it to pay taxes and buy goods, and the local economy depended on it. Then, in 1791, the young American government under Treasury Secretary Alexander Hamilton imposed an excise tax on distilled spirits to help pay off the national debt. For the small farmers of western Pennsylvania, whiskey was their main source of income, and the tax fell on them far more heavily than on the large commercial distilleries of the East. The result was the Whiskey Rebellion.
Farmers attacked tax collectors and burned warehouses, and the uprising grew large enough that President George Washington personally led an army of roughly 13,000 soldiers into western Pennsylvania to put it down. The tax remained in place, but its consequences were lasting. Discontented distillers, unwilling to pay the levy, packed up and moved west, into what was then the edge of the frontier. There, in the future state of Kentucky, they built new distilleries.
The tax was repealed by President Thomas Jefferson in 1802, but by then the center of American whiskey production had already shifted. The distillers who had left did not return. A new generation of whiskey makers was now at work in Kentucky, and the state turned out to be extraordinarily well suited to their craft. Nature had set the stage.
Kentucky sat on vast limestone deposits, and the groundwater that filtered through them had its iron removed, preventing the bitter, cloudy quality that plagued other spirits. The water was enriched with calcium, which would later prove essential for fermenting corn mash. The locals knew none of the chemistry. They only knew the water produced a finer whiskey than anything they had made before.
The climate was equally fortunate. Kentucky summers could push warehouse temperatures past forty degrees Celsius, while winters dropped well below freezing. Barrels of young whiskey expanded and contracted through dozens of cycles each year, forcing the spirit to breathe and draw out the sweet, woody flavors of the oak. It was a process that could never have happened in the more moderate climate of Scotland, where Scotch was developing along a very different path.
The most surprising element of bourbon’s rise, however, was something entirely trivial: the barrel itself. The most popular story credits a Baptist preacher named Elijah Craig with accidentally burning the inside of several barrels in the late eighteenth century. Rather than discard them, he used them to hold whiskey anyway. Months later, according to the legend, he opened the barrels to find a liquid of beautiful amber color and a delightful caramel taste unlike anything he had ever encountered.
Historians, however, have found no documents proving Craig was the first to char a barrel. Burning wood to remove the smell of salted fish or tar from a barrel was actually common practice at the time, and the charred wood acted as an absorbent for unpleasant odors. It would have been only a matter of time before someone realized the liquid stored inside such a barrel picked up a delicious flavor along the way. Yet the legend has endured, partly because it makes for a good story and partly because a single heroic inventor is far more marketable for a whiskey label than dozens of anonymous distillers stumbling onto the same trick.
One modern brand has even built its entire identity around the Elijah Craig myth, and most of the people who buy its product will never hear the more complicated truth. By the middle of the nineteenth century, bourbon was firmly associated with whiskey made from corn and aged in charred oak. Historians have never fully agreed on where the name came from. One theory holds that it comes from Bourbon County, Kentucky, itself named after the French royal family, a nod to France being among the first nations to recognize American independence.
Another claims it came from Bourbon Street in New Orleans, where the whiskey was shipped down the Mississippi River. It was not until 1964 that the United States government officially resolved the matter of what bourbon was. Congress declared it a distinctive type of American whiskey, setting out the requirements that still define it today. Notably absent from the resolution was any requirement that bourbon be made in Kentucky.
The law allowed it to be produced in any state. But the combination of limestone water, extreme climate, and generations of accumulated know-how made it almost certain that no other state could compete. One clause in the law, however, was not accidental. The requirement that bourbon be aged in new charred oak barrels was fought for at the legislative level for years, and the reason was simple business.
If every barrel could be used only once, bourbon producers would always need a fresh supply. The spent barrels could then be sold to makers of sherry, Scotch, Irish whiskey, rye, tequila, and rum, producers for whom used barrels were perfectly acceptable. The law created a thriving market for spent barrels from which both sides profited. But before bourbon producers could enjoy the fruits of their success, they had to survive a crisis that nearly destroyed them.
In January 1920, nationwide Prohibition made the production and sale of alcohol illegal. Hundreds of distilleries closed within months, and thousands of workers lost their jobs. Decades of accumulated skill were locked away. Yet bourbon never fully disappeared, because the law contained a loophole.
Whiskey could still be produced and sold for medicinal purposes, under the strict supervision of pharmacies. The government allowed six distilleries to remain open, and doctors prescribed whiskey for almost every imaginable ailment, from the common cold to neurosis. Among the survivors was National Distillers, which grew into a major player in the national market by the time Prohibition ended in 1933. The loophole also shaped the future of American retail.
Networks of pharmacies that sold medicinal liquors flourished during the Dry years, and one of the most notable was Walgreens, which historians generally agree expanded rapidly through the sale of prescription alcohol, though they continue to debate how significant that factor truly was. Prohibition was barely over when the next threat arrived. When the United States entered World War II in 1941, the military faced an acute shortage of industrial alcohol, a vital ingredient in gunpowder, synthetic rubber, and the newly developed penicillin. Kentucky’s distilleries, capable of producing millions of gallons of high-proof spirits, were the obvious solution.
The government compelled most bourbon producers to halt civilian production and turn their facilities to the war effort. For several years, the bourbon that did exist came overwhelmingly from whatever pre-war stock had been set aside. When the war ended and the distilleries reopened, the supply of aged whiskey was severely diminished, and what remained was of noticeably lower quality. Some distilleries had been forced even further afield, switching to synthetic rubber production after the Japanese conquest of Southeast Asia cut off the supply of natural rubber.
Industry historians point to the late 1940s and early 1950s as a period of decline, barely remembered today. Only a handful of independent brands managed to maintain any supply of pre-war whiskey for their most loyal customers, and bottles from that era have since become prized collectibles. The industry recovered, but its next major upheaval came not from government regulation or war, but from the peculiarities of human desire. In the decades since, bourbon has experienced an explosion of popularity, and at the center of it stands a single whiskey.
Once a small product of a family-owned distillery, Pappy Van Winkle combined relative scarcity, extreme aging, and a devoted following to achieve legendary status. A bottle that sold for $150 upon release can now fetch five thousand or even ten thousand dollars on the resale market. Because the supply is so limited, many distilleries hold lotteries to decide who gets the privilege of buying the whiskey at its much lower official price. The demand became so intense that in 2013 thieves stole several barrels worth more than $26,000, a crime that became known as the Pappy Heist.
The brand’s popularity also spawned a market full of forgeries, forcing genuine bottles to be carefully examined for serial numbers and other distinguishing features. Restaurants and bars will buy a single bottle just to advertise it for tasting at inflated prices, since most customers could never afford an entire bottle. The frenzy around this one brand has turned into an entire industry of speculation, and many other distilleries now employ the same strategy of limited releases and artificial scarcity to drive their prices several times higher than usual. The journey of bourbon began with pioneers who had no barley and made whiskey from local corn.
It was shaped by a tax that drove farmers to armed rebellion, by Kentucky’s limestone-filtered water discovered before anyone understood chemistry, by a legend of a preacher and a charred barrel whose authenticity may never be settled, and by a law that nearly killed the industry but was saved by its own loophole in the form of pharmacy scripts. It was saved again by a world war that turned whiskey distilleries into factories for penicillin and smokeless powder. And finally, it was transformed by a cult of scarcity that turned a common bottle into an object of five-figure speculation. Time and again, the industry seemed to face an insurmountable challenge, and time and again it found a way through, adapting its production when necessary and adopting better versions of itself when it had to.
Even the cult of scarcity was a response to the fear that the product might not be valuable enough to survive. In that way, each threat gave bourbon a new lease on life, and every glass poured today carries the history of an industry that has faced three near-fatal accidents and come through them all.