"A study of the history of opinion is a necessary preliminary to the emancipation of the mind." ― John Maynard Keynes From John Maynard Keynes Economist Added on 1/31/2026 About John Maynard Keynes John Maynard Keynes was a British economist whose ideas transformed modern macroeconomics and public policy. His work during the Great Depression helped establish demand-side economic theory. Born: 1883-06-05 Died: 1946-04-21 View all quotes from John Maynard Keynes