As the end of the eighteenth century approached, Britain experienced many changes in power and prestige: the American colonies had broken away; the philosophy of expansionism and imperial domination was being attacked from within and without, and the primacy of the British fleet and trade organizations was fast becoming a thing of the past. All of these factors, and others, forced a mood of re-evaluation upon the British government and people. Throughout the empire and its colonies the discussion of the merits and morality of the slave trade, for example, reached previously unheard of proportions, as the newly-rediscovered sciences of free-trade economics, moral philosophy, and cultivation technology turned towards the examination of slavery. Nowhere was this more active and adamant than in the Scottish university cities, which had become the centers of intellectual and scientific thought and practice. Thus it is no surprise to find this thematic focus upon the newly strengthened and emboldened Scottish stage. One manifestation was Archibald MacLaren's The Negro Slaves, a play in which can be found the seeds and fruits of the Scottish Enlightenment as it relates to the British abolitionist movement, the economic shift in overseas trade, and the overall milieu of colonial perception.