How Marcus Aurelius Influenced Adam Smith (No, Really)

A Roman emperor seems like an unlikely intellectual influence for a classical liberal thinker such as Adam Smith. Upon closer inspection, however, Smith and Aurelius are like two peas in a pod: both men believed that the root of morality lies within the self-scrutiny of one's conscience; both believe in the primacy of the virtue of self-control; and both believe in the importance of sympathy as a tool for cooperation and the betterment of civilized society.