In 600 BC, the Maya were drinking something they believed had psychedelic properties and was connected to the human heart: chocolate made from cacao seeds. The cacao tree had been domesticated over 5,000 years earlier in present-day Ecuador, then introduced to Mesoamerica, where it became far more than a beverage. The Aztecs and Maya treated cacao as a divine gift, using it as currency, medicine, and in sacred ceremonies. Early cacao drinks were sometimes fermented from the pulp around the seeds to create something alcoholic, though exactly when a drink we'd recognize as chocolate first emerged remains unclear.

Everything changed in 1519 when Spanish conquistadors encountered cacao and brought it back to Spain, where it was reframed as medicine. Over the next three centuries, chocolate spread through Europe's elite circles, debated passionately for its supposed medicinal and aphrodisiac properties. The real transformation came in the 19th century: Swiss and British innovators developed technological processes that turned chocolate from an elite drink into solid bars that anyone could consume. Suddenly the production could be industrialized, scaled, democratized.

Today chocolate is unrecognizable from its ceremonial origins. Since World War I, manufacturers introduced white chocolate, couverture varieties, and cheaper substitutes like lecithin and alternative fats. By the 20th century, the chocolate trade exploded across Asia and Africa, and as of 2018, the global market exceeded $100 billion, though it remains concentrated in just a handful of cocoa processors and chocolate makers. What once was sacred currency is now a commodity, though awareness of child labor in cocoa production has begun reshaping how we think about those dark, sweet squares.