"In wartime they attack a part of the body that other weapons cannot reach in an attempt to affect the way which participants perform on the field of battle." (
Therefore the demonstrated tools refer to political propaganda in the two World Wars.
Propaganda has the ability to change a war, a natural evil, into a so-called "just" war. Violence then is supposedly defense, no more aggression.
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The first of the great medieval universities was established at Bologna. At the beginning, universities predominantly offered a kind of do-it-yourself publishing service.
Books still had to be copied by hand and were so rare that a copy of a widely desired book qualified for being invited to a university. Holding a lecture equaled to reading a book aloud, like a priest read from the Bible during services. Attending a lecture equaled to copy a lecture word by word, so you had your own copy of a book, thus enabling you to hold a lecture, too.
For further details see History of the Idea of a University,