"Commerce and manufactures gradually introduced order and good government, and with them the liberty and security of individuals, among the inhabitants of the country, who had before lived almost in a continual state of war with their neighbors, and of servile dependency upon their superiors. This, though it has been the least observed, is by far the most important of all their effects. Mr. Hume is the only writer who, so far as I know, has hitherto taken notice of it."
- Adam Smith's "The Wealth of Nations," Book III, Chapter IV
Most people today have never heard of the Scottish 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 his fellow Scotsman 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 leave the coverage of his empiricism - and his other contributions to the philosophy of science - to others.
Adam Smith