Coffee started as a food, not a drink. Early East African tribes mixed coffee cherries with animal fat to create portable energy balls, something like a primitive protein bar for long journeys. From there, coffee’s role expanded dramatically across centuries and civilizations, serving purposes that went far beyond a morning pick-me-up.
An Energy Food for Travel
The earliest known use of coffee had nothing to do with brewing. In East Africa, tribes took the whole coffee cherry (the fruit surrounding what we now call the bean) and combined it with animal fat to form dense, calorie-rich balls they could carry on long treks. The natural caffeine in the fruit provided alertness, while the fat delivered sustained energy. Coffee was fuel in the most literal sense.
A Tool for All-Night Prayer
By the 15th century, Sufi mystics in Yemen had discovered that brewed coffee could keep them awake during dhikr, a practice of rhythmic chanting and remembrance of God that stretched deep into the night. In the candlelit chambers of Sufi lodges, coffee became part of the ritual itself. It kept the body engaged while practitioners pursued hours of sustained spiritual focus. This religious use was one of the main reasons coffee drinking spread so quickly across the Islamic world.
A Sober Alternative to Alcohol
In England, coffee arrived as a healthier and cheaper substitute for gin, beer, and ale, which dominated daily life and fueled widespread social problems. Coffeehouses reflected the values of the emerging middle class: discussion, sobriety, and refined sociability. The logic was straightforward. Continued coffee drinking in one sitting sharpened the mind and improved conversation, while continued drinking of alcohol only increased the risk of drowsiness and violence.
The temperance movement later picked up on this same idea. Organizations like the Salvation Army opened coffeehouses specifically to provide alcohol-free gathering places. Coffee gave people a social ritual that didn’t revolve around getting drunk.
The Center of Political Life
Coffeehouses quickly became more than places to drink. In the Ottoman Empire, they served as the center of social life outside mosques and workplaces, spaces where men of different social classes could sit together and exchange ideas freely. That openness made rulers nervous.
In 1511, the Governor of Mecca banned coffee after hearing that unfavorable opinions about him were circulating in coffeehouses. He argued that coffee, like wine, was a dangerous substance that distorted perception and led to radical thoughts. The Grand Vizier of Constantinople later shut down the city’s coffeehouses during wartime for similar reasons. The Ottoman Sultan Murad IV went furthest of all, declaring coffee drinking a capital offense in 1633 and threatening execution for anyone caught with a cup. The pattern repeated across centuries: coffeehouses bred conversation, conversation bred dissent, and rulers responded by trying to eliminate both.
A Place to Build Businesses
In 17th-century London, coffeehouses doubled as offices. After the Great Fire of 1666 destroyed much of the city, coffee shops became gathering places where merchants and entrepreneurs could resume business while London rebuilt. By 1688, there were more than 80 coffeehouses in the city, each one a hub for a different trade or interest group.
The most famous example is Edward Lloyd’s Coffee House on Tower Street, which specialized in shipping information and attracted ship owners and captains returning from overseas voyages. Lloyd’s began renting out tables (called “boxes”) where businessmen sold insurance to ship owners in case their vessels never returned. That coffeehouse eventually became Lloyd’s of London, one of the world’s largest insurance markets. The London Stock Exchange has similar coffeehouse roots. Coffee didn’t just fuel these industries. The social space it created made them possible.
A Military Staple
During the American Civil War, coffee became essential military supply. Union soldiers received 36 pounds of coffee per year as part of their official rations, and the 1863 Quartermaster Guide included detailed instructions for how coffee should be transported alongside other freight. Soldiers relied on it to stay alert during long marches and overnight watches, but its importance went deeper than caffeine.
A tired soldier would drop out of the marching column, build a small campfire, brew his coffee, nap behind the nearest shelter, then hurry to catch up with his company. In letters and diaries from the war, soldiers wrote about coffee more than almost any other subject. Historian Jon Grinspan, who studied these firsthand accounts, described it as “the one constant, the one consolation in what’s otherwise an incredibly hard experience.” Coffee was so prevalent in Civil War writing that it was almost unnoticed precisely because it was everywhere.
Modern Industrial and Cosmetic Uses
Today, coffee serves purposes that have nothing to do with drinking. Spent coffee grounds, the waste left after brewing, are being repurposed across several industries. They can be converted into biofuels, bioplastics, and natural fertilizers. In cosmetics, the compounds found in coffee byproducts are valued for their antioxidant properties and their ability to reduce the appearance of enlarged pores. Spent grounds show up in facial scrubs, body exfoliants, emulsions, hydrogels, and even sunscreens, providing both functional performance and a natural fragrance that consumers respond to.
The scale of this repurposing matters because the coffee industry generates enormous amounts of waste. Converting those grounds into cosmetic ingredients or renewable energy sources turns a disposal problem into a resource, supporting what researchers call circular business models where nothing gets thrown away if it still has value.