The Story of Rum

What It Covers

Rum's evolution from a Caribbean sugar-refining waste product into a global economic force that drove Atlantic slave trade networks, shaped Royal Navy operations, and produced 400,000 metric tons of sugar annually by 1800.

Key Questions Answered

• •Sugar-to-rum ratio: Sugar refining converts only 10% of raw cane sap into crystallized sugar, leaving massive molasses surpluses — Caribbean plantations discarded roughly 50,000,000 gallons of molasses annually before distillers discovered fermentation could convert it into rum.
• •Enslaved knowledge transfer: Rum production depended directly on fermentation techniques brought by enslaved Africans, who contributed millennia-old knowledge of fermenting grains and palm sap. Two specific additives — scummings (nutrient-rich foam) and dunder (acidic distillation residue) — were essential to the process.
• •Triangle trade currency: Rum functioned as the primary currency across the Atlantic triangle trade, used to purchase enslaved Africans, who then cultivated sugar, which yielded molasses to distill more rum — a self-reinforcing economic loop spanning three continents.
• •Naval medicine origin: British Admiral Edward Vernon mixed Caribbean lime juice, rum, and water aboard HMS Burford to combat scurvy, creating what became known as Old Grog — arguably the world's first cocktail, later standardized across the entire Royal Navy.