How, if at all, did the great books idea contribute to the idea of Manufacturing Consent for the 20th century?

One of the primary goals of The Great Books, was to make some of the (especially ancient writers) more accessible to modern audiences with respect to ready availability of their works which were otherwise much more expensive.

This certainly says something about both publishing and reading practices of the early 20th century.

While the Syntopicon ultimately appears in book form, one must recall that it started life as a paper slip-based card index (Life v24, issue 4, 1948). This index can be queried in some of the ways one might have queried a library card catalog or more specifically the way in which Niklas Luhmann indicated that he queried his zettelkasten (Luhmann,1981). Unlike a library card catalog, The Syntopicon would not only provide a variety of entry places within the Western canon to begin their search for answers, but would provide specific page numbers and passages rather than references to entire books.

The Syntopicon invites the reader to make on the set whatever demands arise from his own problems and interests. It is constructed to enable the reader, no matter what the stages of his reading in other ways, to find that part of the Great Conversation in which any topic that interests him is being discussed. (p. 85)

While the search space for the Syntopicon wasn't as large as the corpus covered by larger search engines of the 21st century, the work that went into making it and the depth and focus of the sources make it a much more valuable search tool from a humanistic perspective. This work and value can also be seen in a personal zettelkasten. Some of the value appears in the form of having previously built a store of contextualized knowledge, particularly in cases where some ideas have been forgotten or not easily called to mind, which serves as a context ratchet upon which to continue exploring and building.

Google translation:

The sheer quantity exceeds the possibilities of book publication, the complex, multidimensional structure of a networked information base cannot be reproduced in print, and finally the dynamic of a constantly growing and constantly correcting material does not fit into the rigid rhythm of book production, in which each expanded and corrected new edition is associated with an incalculable amount of effort. A book publication could only offer a snapshot of such a database, reduced to a specific perspective. This too can be very useful from time to time, but it does not solve the problem of publishing the entire material.

While the writing criticism of "dumping out one's zettelkasten" into a paper, journal article, chapter, book, etc. has been reasonably frequent in the 20th century, often as a means of attempting to create a linear book-bound context in a local neighborhood of ideas, are there other more complex networks of ideas which we're not communicating because they don't neatly fit into linear narrative forms? Is it possible that there is a non-linear form(s) based on network theory in which more complex ideas ought to better be embedded for understanding?

Some of Niklas Luhmann's writing may show some of this complexity and local or even regional circularity, but perhaps it's a necessary means of communication to get these ideas across as they can't be placed into linear forms.

One can analogize this to Lie groups and algebras in which our reading and thinking experiences are limited only to local regions which appear on smaller scales to be Euclidean, when, in fact, looking at larger portions of the region become dramatically non-Euclidean. How are we to appropriately relate these more complex ideas?

What are the second and third order effects of this phenomenon?

An example of this sort of non-linear examination can be seen in attempting to translate the complexity inherent in the Wb (Wörterbuch der ägyptischen Sprache) into a simple, linear dictionary of the Egyptian language. While the simplicity can be handy on one level, the complexity of transforming the entirety of the complexity of the network of potential meanings is tremendously difficult.