But I would do less than justice to Mr. Adler's achieve-ment if I left the matter there. The Syntopicon is, in additionto all this, and in addition to being a monument to the indus-try, devotion, and intelligence of Mr. Adler and his staff, astep forward in the thought of the West. It indicates wherewe are: where the agreements and disagreements lie; wherethe problems are; where the work has to be done. It thushelps to keep us from wasting our time through misunder-standing and points to the issues that must be attacked.When the history of the intellectual life of this century iswritten, the Syntopicon will be regarded as one of the land-marks in it.
p xxvi
Hutchins closes his preface to his grand project with Mortimer J. Adler by giving pride of place to Adler's Syntopicon.
Adler's Syntopicon isn't just an index compiled into two books which were volumes 2 and 3 of The Great Books of the Western World, it's physically a topically indexed card index of data (a grand zettelkasten surveying Western culture if you will). It's value to readers and users is immeasurable and it stands as a fascinating example of what a well-constructed card index might allow one to do even when they don't have their own yet.
Adler spoke of practicing syntopical reading, but anyone who compiles their own card index (in either analog or digital form) will realize the ultimate value in creating their own syntopical writing or what Robert Hutchins calls participating in "The Great Conversation" across twenty-five centuries of documented human communication.
See also: https://hypothes.is/a/WF4THtUNEe2dZTdlQCbmXw
The way Hutchins presents the idea of "Adler's achievement" here seems to indicate that Hutchins didn't have a direct hand in compiling or working on it directly.