How did a simple commodity, once the prized monopoly of kings and princes, become an essential ingredient in the lives of millions, before mutating yet again into the cause of a global health epidemic? Prior to 1600, sugar was a costly luxury, the domain of the rich. But with the rise of the sugar colonies in the New World over the following century, sugar became cheap, ubiquitous and an everyday necessity. Less than fifty years ago, few people suggested...