In the first part, it criticizes at length the concept of "Renaissance" historical epoch "invented" by the later periods (the Enlightenment, Revolution, republic), the better to castigate the Middle Ages and justify the "benefits" of modernism.
A sledgehammer blows of arguments, the author catapult off all the clichés, platitudes or cartoons about the medieval period (which are too often encountered in the history books, film or some literature).
On the merits, it is smoothly conducted. It is rather about the form that the fishing book reading is sometimes difficult even arid, and the text lacks picturesque anecdotes. If we really do not mind, we have to do a little violence because it is often difficult to read a chapter of a trait.
I also find that the author focuses on the supposed end of the Middle Ages (XIV and XV century) and the whole period from the end (always assumed) of the Roman Empire in the year one thousand (including terror would have never existed) is well covered. Jacques Heers is also very hard on the ins historians and writers of the "old Middle Age", it tends to repeat his charges too and get a little too forward.