The precursors to rum date back to antiquity. Development of fermented drinks produced from sugarcane juice is believed to have first occurred either in ancient India or in China, and to have spread from there. An example of such an early drink is brum. Produced by the Malay people, brum dates back thousands of years. Marco Polo also recorded a 14th-century account of a "very good wine of sugar" that was offered to him in the area that became modern-day Iran.
The first distillation of rum took place on the sugarcane plantations of the Caribbean in the 17th century. Plantation slaves first discovered molasses, a byproduct of the sugar refining process, could be fermented into alcohol. Later, distillation of these alcoholic byproducts concentrated the alcohol and removed impurities, producing the first true rums. Tradition suggests rum first originated on the island of Barbados. However, in the decade of the 1620s, rum production was recorded in Brazil. A liquid identified as rum has been found in a tin bottle found on the Swedish warship Vasa, which sank in 1628.
A 1651 document from Barbados stated, "The chief fuddling they make in the island is Rumbullion, alias Kill-Divil, and this is made of sugar canes distilled, a hot, hellish, and terrible liquor."