Yale professor Iván Szelényi traces a line from Adam Smith to John Stuart Mill in this lecture from Foundations of Modern Social Theory (SOCY 151). He opens with the so called two Smiths problem, weighing the sympathy-centered ethics of The Theory of Moral Sentiments against the self-interest reading of The Wealth of Nations, and suggests the two cohere once you see benevolence itself as socially self-interested. He covers the labor theory of value and the invisible hand before turning to Mill, Bentham's student from childhood, and how Mill's utilitarianism tries to humanize Bentham's calculus of pleasure and pain. The lecture closes on Mill's argument that individual liberty must never be sacrificed for expediency, laying out why that principle became his most lasting contribution. Chapter markers divide the session into six segments moving from Smith's historical context through Mill's core themes.