A study of the history of opinion is a necessary preliminary to the emancipation of the mind.

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Original Citation

Keynes, John Maynard. The End of Laissez-Faire. Hogarth Press, 1926, ch. 1.

Current Citation

Keynes, John Maynard. "The End of Laissaz-faire." The Essential Keynes. Penguin, edited by Robert Skidelsky, 2016, ch. 1.