Adam Smith

Smith matters in the Hume story because he took several of Hume’s psychological and social insights and gave them a more elaborate theory of moral life and commercial society. The two men were friends, and their friendship itself belongs to the intellectual atmosphere of the Scottish Enlightenment: a world of conversation in which philosophy, history, economics, and moral judgment interpenetrated. Yet the friendship was not merely affectionate; it was also an apprenticeship, and in some respects a test. Smith admired Hume’s clarity and courage, but he also felt the burden of being the younger man who had to turn a brilliant skeptic into a usable social philosophy.

In The Theory of Moral Sentiments, Smith makes sympathy central to moral life. That is not Hume’s doctrine exactly, but it grows from the same soil. Hume had insisted that reason is not the source of moral approval; Smith develops a more detailed account of how we come to judge ourselves and others through an imagined spectator. The psychological engine here is revealing: Smith does not trust naked impulse, nor does he trust abstract law. He assumes human beings crave recognition, impartiality, and social standing, and he builds morality from that craving. His moral theory is not a celebration of innocence but an anatomy of self-command. Beneath its balance lies a deep anxiety about vanity, partiality, and the humiliations of dependency. Smith understood that people often do good not because they are pure, but because they fear being seen as contemptible.

That makes his work look warmer than Hume’s, yet also more exacting. Smith’s ideal observer is not a comforting companion but a stern internal witness. He gives the self a courtroom inside the mind. Publicly, Smith appears humane, moderate, almost placid; privately, his intellectual project is severe. He wants to discipline appetite without denying it, to explain social peace without pretending virtue is natural abundance. In this way he is less sentimental than later admirers sometimes assume. His concern is not simply that people be kind, but that their self-regard be made socially useful.

Smith also extends Hume’s attention to convention and unintended order. In the Wealth of Nations, markets emerge not from design but from countless ordinary adjustments, much as Hume saw practices like justice and property arising from human needs rather than sacred command. Smith’s work therefore shows how Humean themes could migrate into political economy. But here the cost becomes visible. Commercial society promises abundance, yet it also fragments life into specializations, makes labor repetitive, and teaches people to value one another through price and usefulness. Smith does not ignore these injuries; he tries to justify them as the price of prosperity and political stability. That justification is the moral tension at the center of his career.

Smith’s contradiction is that he is both warmer and more system-building than Hume. He wants to explain social order without reducing it to mechanism, and he retains a stronger confidence in benevolent spectatorship than Hume’s cooler psychology sometimes allows. But precisely because he revised Hume, he helps reveal Hume’s lasting power: Hume opened a path along which later thinkers could travel without repeating him. Smith’s legacy is therefore double. He enlarged moral philosophy and political economy, but he also normalized a world in which character, conscience, and commerce are inseparable—and in which the human cost of social order is quietly absorbed into the theory that explains it.