Dugald Stewart was a Scottish philosopher and mathematician. Today regarded as one of the most important figures of the later Scottish Enlightenment, he was renowned as a populariser of the work of Francis Hutcheson and of Adam Smith. Trained in mathematics, medicine and philosophy, his lectures at the University of Edinburgh were widely disseminated by his many influential students. In 1783 he was a joint founder of the Royal Society of Edinburgh. In most contemporary documents he is referred to as Prof Dougal Stewart.

The Scottish Enlightenment was the period in 18th- and early-19th-century Scotland characterised by an outpouring of intellectual and scientific accomplishments. By the eighteenth century, Scotland had a network of parish schools in the Scottish Lowlands and five universities. The Enlightenment culture was based on close readings of new books, and intense discussions which took place daily at such intellectual gathering places in Edinburgh as The Select Society and, later, The Poker Club, as well as within Scotland's ancient universities.