A study of the history of opinion Posted on August 3, 2017August 3, 2012 by admin “A study of the history of opinion is a necessary preliminary to the emancipation of the mind.” — John Maynard Keynes Author: John Maynard Keynes Category: history Tags: history, John Maynard Keynes Spread the love Related posts: Ideas shape the course of history. The history of liberty is a history Black History Month must be more than History is everything that has ever happened.