The Theory of Moral Sentiments) is a philosophical book by Adam Smith, published in 1759. The work provided the ethical, philosophical, psychological, and methodological underpinnings of Smith’s later works,

In the Theory of the Moral Sentiments, Smith tries to explore which emotions a person is subject to, how these emotions relate to each other and how these emotions can be categorized. The reason he does this is that he wants to investigate how these emotions play a role in the formation of our moral judgments.