Most people today have never heard of the philosopher David Hume, a great figure of the Scottish Enlightenment. But many people today have heard of the man who was probably his best friend - a man who was greatly influenced by his philosophy (political, economic, and otherwise), and influenced him in his turn. That man was Adam Smith.
Statues of David Hume and Adam Smith
This is not to say that Mr. Hume's accomplishments were just in economics, or that Adam Smith was the only person that he influenced - he influenced many people, in the natural sciences and elsewhere. However, I shall focus this post on economics, and his influence on Adam Smith; and will leave the coverage of his empiricism - and his other contributions to the philosophy of science - to others.