… is from page 289 of Frank Knight’s January 1948 Philosophical Review paper, “Free Society: Its Basic Nature and Problem,” as this paper is reprinted in Knight’s 1956 collection, On the History and Method of Economics:
The establishment of freedom, rooted in the liberation of the mind from traditional dogma and mythology, enforced by ecclesiastical and political authority, is the greatest revolution of all time or since the dawn of conscious life.


The establishment of freedom, rooted in the liberation of the mind from traditional dogma and mythology, enforced by ecclesiastical and political authority, is the greatest revolution of all time or since the dawn of conscious life.
