To write an excellent monograph is a challenge, but to write a polyvalent work of simultaneously broad and erudite scholarship is an astounding feat. Ong's book pinpoints the humanist pedagogical "reforms" of Peter Ramus as the nexus of several crucial historical developments that intersect in the program of this one man.
The birth of methodology: Ramus' anti-Aristotelian polemics rendered him a controversial figure in his day, and his attempts to reconfigure the educational curricula employed by the Scholastic universities led his critics to decry him for a weak methodus (at this point understood as the way through one which one proceeds through their subject matter). Ong contends that Ramus unintentionally spawned the question of method which would become central for Descartes and haunt the natural and human sciences ever since.
Print and pedagogical reform: Ong also argues that Ramus works on rhetoric and dialectic were among the first to make full of use of print technology. By creating clear diagrams and charts on the page, by simplifying the abstruse concatenations of medieval logic, by constantly revising his works to respond to critics, and by harnessing the productive capacities of the printing press, Ramus was able to disseminate his educational program across Europe, becoming the central figure for groups such as the Puritans of New England. Ong stresses that Ramus' reform of method and pedagogy was not motivated by philosophical reasons as much as the need to reform the inefficiencies of scholastic educational practices.
Debunking the myth of Thomism: While Ong's preference for Catholicism is apparent throughout the book (he was a Jesuit priest after all), he has no sympathy for the 20th century nostalgia for Thomism that characterized neo-scholasticism (Maritain and MacIntyre later on). Ong clearly shows that the idea that Thomism reigned supreme before Scotus or the Reformation has zero historical grounding. When Aquinas died, the University of Paris decided they only wanted to preserve a few his commentaries and his treatise on building aqueducts. The vast majority of scholastic institutions consisted of logicians. (Theologians constituted a significantly smaller number of virtually every faculty and their voice generally remained unheard in scholastic educational programmes.) In terms of educational dissemination, Thomism was at best a marginal doctrine. Ong also rejects the traditional realist-nominalist distinction often used to bifurcate the Western philosophical tradition between Scotus and Ockham. He provides a compelling argument for how these two categories are unhelpful for understanding medieval and Renaissance thought.
Visual space, media ecology and restructuring the mind: Ong is very well known for his contributions to media ecology, and he argues in this work that the technology of the print book was part of a larger process of constructing and defining knowledge almost exclusively in visual and spatial terms. Charts and diagrams are visual ways we contain and delineate knowledge, and philosophical vocabulary became increasingly visualist in how it described its processes. For example, to define is to set a limit or boundary on a space. For Ramus, the nature of things was not conveyed through oral dialogue but through the written word and its containment in visual spaces. Scholastic pedagogy featured the oral monologue of the professor while humanist pedagogy featured the text as the primary instrument for truth and understanding. The humanists engaged in oral dialogue for the sake of discerning the more real truth contained (note this is also a spatial concept) within the written/printed text.
Literary and philosophical impact of Ramist pedagogy: Ong also draws fascinating attention to a variety of ways that Ramism gave birth to the greatest minds of the Renaissance. He argues that it was only because education shifted from listening-only to dialogue and exercises that required the students to think and imagine more, that great thinkers and writers of the later Renaissance like Shakespeare were possible. He argues that the visualist typology of Ramus' works were an important precursor to the highly visual style of the metaphysical poets among others.
There are a wide variety of other historical, etymological, pedagogical, and philosophical arguments that Ong convincingly weaves into his narrative, and it is truly remarkable that he could cover so much ground in his studies (especially since he personally tracked down thousands of various copies and editions of Ramus' works). This is truly a landmark study, a classic which is essential for anyone interested in intellectual history, methodology, media ecology, or the history of the book.