Adam Smith (1723-90) taught both logic and moral philosophy at Glasgow University. His Wealth of Nations revolutionised the economic theories of the time. Andrew Skinner teaches at the Adam Smith Institute and is an expert on the author's work.
"Adam Smith's enormous authority resides, in the end, in the same
property that we discover in Marx: not in any ideology, but in an
effort to see to the bottom of things."
--Robert L. Heilbroner